[udp] Eliminate per-loop heap allocation using std::span (#13838)

Co-authored-by: Clyde Stubbs <2366188+clydebarrow@users.noreply.github.com>

.clang-tidy.hash

@@ -1 +1 @@
-cf3d341206b4184ec8b7fe85141aef4fe4696aa720c3f8a06d4e57930574bdab
+37ec8d5a343c8d0a485fd2118cbdabcbccd7b9bca197e4a392be75087974dced

.github/actions/restore-python/action.yml

@@ -22,7 +22,7 @@ runs:
         python-version: ${{ inputs.python-version }}
     - name: Restore Python virtual environment
       id: cache-venv
-      uses: actions/cache/restore@8b402f58fbc84540c8b491a91e594a4576fec3d7 # v5.0.2
+      uses: actions/cache/restore@cdf6c1fa76f9f475f3d7449005a359c84ca0f306 # v5.0.3
       with:
         path: venv
         # yamllint disable-line rule:line-length

.github/workflows/ci.yml

@@ -47,7 +47,7 @@ jobs:
           python-version: ${{ env.DEFAULT_PYTHON }}
       - name: Restore Python virtual environment
         id: cache-venv
-        uses: actions/cache@8b402f58fbc84540c8b491a91e594a4576fec3d7 # v5.0.2
+        uses: actions/cache@cdf6c1fa76f9f475f3d7449005a359c84ca0f306 # v5.0.3
         with:
           path: venv
           # yamllint disable-line rule:line-length
@@ -157,7 +157,7 @@ jobs:
           token: ${{ secrets.CODECOV_TOKEN }}
       - name: Save Python virtual environment cache
         if: github.ref == 'refs/heads/dev'
-        uses: actions/cache/save@8b402f58fbc84540c8b491a91e594a4576fec3d7 # v5.0.2
+        uses: actions/cache/save@cdf6c1fa76f9f475f3d7449005a359c84ca0f306 # v5.0.3
         with:
           path: venv
           key: ${{ runner.os }}-${{ steps.restore-python.outputs.python-version }}-venv-${{ needs.common.outputs.cache-key }}
@@ -193,7 +193,7 @@ jobs:
           python-version: ${{ env.DEFAULT_PYTHON }}
           cache-key: ${{ needs.common.outputs.cache-key }}
       - name: Restore components graph cache
-        uses: actions/cache/restore@8b402f58fbc84540c8b491a91e594a4576fec3d7 # v5.0.2
+        uses: actions/cache/restore@cdf6c1fa76f9f475f3d7449005a359c84ca0f306 # v5.0.3
         with:
           path: .temp/components_graph.json
           key: components-graph-${{ hashFiles('esphome/components/**/*.py') }}
@@ -223,7 +223,7 @@ jobs:
           echo "component-test-batches=$(echo "$output" | jq -c '.component_test_batches')" >> $GITHUB_OUTPUT
       - name: Save components graph cache
         if: github.ref == 'refs/heads/dev'
-        uses: actions/cache/save@8b402f58fbc84540c8b491a91e594a4576fec3d7 # v5.0.2
+        uses: actions/cache/save@cdf6c1fa76f9f475f3d7449005a359c84ca0f306 # v5.0.3
         with:
           path: .temp/components_graph.json
           key: components-graph-${{ hashFiles('esphome/components/**/*.py') }}
@@ -245,7 +245,7 @@ jobs:
           python-version: "3.13"
       - name: Restore Python virtual environment
         id: cache-venv
-        uses: actions/cache@8b402f58fbc84540c8b491a91e594a4576fec3d7 # v5.0.2
+        uses: actions/cache@cdf6c1fa76f9f475f3d7449005a359c84ca0f306 # v5.0.3
         with:
           path: venv
           key: ${{ runner.os }}-${{ steps.python.outputs.python-version }}-venv-${{ needs.common.outputs.cache-key }}
@@ -334,14 +334,14 @@ jobs:
 
       - name: Cache platformio
         if: github.ref == 'refs/heads/dev'
-        uses: actions/cache@8b402f58fbc84540c8b491a91e594a4576fec3d7 # v5.0.2
+        uses: actions/cache@cdf6c1fa76f9f475f3d7449005a359c84ca0f306 # v5.0.3
         with:
           path: ~/.platformio
           key: platformio-${{ matrix.pio_cache_key }}-${{ hashFiles('platformio.ini') }}
 
       - name: Cache platformio
         if: github.ref != 'refs/heads/dev'
-        uses: actions/cache/restore@8b402f58fbc84540c8b491a91e594a4576fec3d7 # v5.0.2
+        uses: actions/cache/restore@cdf6c1fa76f9f475f3d7449005a359c84ca0f306 # v5.0.3
         with:
           path: ~/.platformio
           key: platformio-${{ matrix.pio_cache_key }}-${{ hashFiles('platformio.ini') }}
@@ -413,14 +413,14 @@ jobs:
 
       - name: Cache platformio
         if: github.ref == 'refs/heads/dev'
-        uses: actions/cache@8b402f58fbc84540c8b491a91e594a4576fec3d7 # v5.0.2
+        uses: actions/cache@cdf6c1fa76f9f475f3d7449005a359c84ca0f306 # v5.0.3
         with:
           path: ~/.platformio
           key: platformio-tidyesp32-${{ hashFiles('platformio.ini') }}
 
       - name: Cache platformio
         if: github.ref != 'refs/heads/dev'
-        uses: actions/cache/restore@8b402f58fbc84540c8b491a91e594a4576fec3d7 # v5.0.2
+        uses: actions/cache/restore@cdf6c1fa76f9f475f3d7449005a359c84ca0f306 # v5.0.3
         with:
           path: ~/.platformio
           key: platformio-tidyesp32-${{ hashFiles('platformio.ini') }}
@@ -502,14 +502,14 @@ jobs:
 
       - name: Cache platformio
         if: github.ref == 'refs/heads/dev'
-        uses: actions/cache@8b402f58fbc84540c8b491a91e594a4576fec3d7 # v5.0.2
+        uses: actions/cache@cdf6c1fa76f9f475f3d7449005a359c84ca0f306 # v5.0.3
         with:
           path: ~/.platformio
           key: platformio-tidyesp32-${{ hashFiles('platformio.ini') }}
 
       - name: Cache platformio
         if: github.ref != 'refs/heads/dev'
-        uses: actions/cache/restore@8b402f58fbc84540c8b491a91e594a4576fec3d7 # v5.0.2
+        uses: actions/cache/restore@cdf6c1fa76f9f475f3d7449005a359c84ca0f306 # v5.0.3
         with:
           path: ~/.platformio
           key: platformio-tidyesp32-${{ hashFiles('platformio.ini') }}
@@ -735,7 +735,7 @@ jobs:
       - name: Restore cached memory analysis
         id: cache-memory-analysis
         if: steps.check-script.outputs.skip != 'true'
-        uses: actions/cache/restore@8b402f58fbc84540c8b491a91e594a4576fec3d7 # v5.0.2
+        uses: actions/cache/restore@cdf6c1fa76f9f475f3d7449005a359c84ca0f306 # v5.0.3
         with:
           path: memory-analysis-target.json
           key: ${{ steps.cache-key.outputs.cache-key }}
@@ -759,7 +759,7 @@ jobs:
 
       - name: Cache platformio
         if: steps.check-script.outputs.skip != 'true' && steps.cache-memory-analysis.outputs.cache-hit != 'true'
-        uses: actions/cache/restore@8b402f58fbc84540c8b491a91e594a4576fec3d7 # v5.0.2
+        uses: actions/cache/restore@cdf6c1fa76f9f475f3d7449005a359c84ca0f306 # v5.0.3
         with:
           path: ~/.platformio
           key: platformio-memory-${{ fromJSON(needs.determine-jobs.outputs.memory_impact).platform }}-${{ hashFiles('platformio.ini') }}
@@ -800,7 +800,7 @@ jobs:
 
       - name: Save memory analysis to cache
         if: steps.check-script.outputs.skip != 'true' && steps.cache-memory-analysis.outputs.cache-hit != 'true' && steps.build.outcome == 'success'
-        uses: actions/cache/save@8b402f58fbc84540c8b491a91e594a4576fec3d7 # v5.0.2
+        uses: actions/cache/save@cdf6c1fa76f9f475f3d7449005a359c84ca0f306 # v5.0.3
         with:
           path: memory-analysis-target.json
           key: ${{ steps.cache-key.outputs.cache-key }}
@@ -847,7 +847,7 @@ jobs:
           python-version: ${{ env.DEFAULT_PYTHON }}
           cache-key: ${{ needs.common.outputs.cache-key }}
       - name: Cache platformio
-        uses: actions/cache/restore@8b402f58fbc84540c8b491a91e594a4576fec3d7 # v5.0.2
+        uses: actions/cache/restore@cdf6c1fa76f9f475f3d7449005a359c84ca0f306 # v5.0.3
         with:
           path: ~/.platformio
           key: platformio-memory-${{ fromJSON(needs.determine-jobs.outputs.memory_impact).platform }}-${{ hashFiles('platformio.ini') }}

.github/workflows/codeql.yml

@@ -58,7 +58,7 @@ jobs:
 
       # Initializes the CodeQL tools for scanning.
       - name: Initialize CodeQL
-        uses: github/codeql-action/init@b20883b0cd1f46c72ae0ba6d1090936928f9fa30 # v4.32.0
+        uses: github/codeql-action/init@45cbd0c69e560cd9e7cd7f8c32362050c9b7ded2 # v4.32.2
         with:
           languages: ${{ matrix.language }}
           build-mode: ${{ matrix.build-mode }}
@@ -86,6 +86,6 @@ jobs:
           exit 1
 
       - name: Perform CodeQL Analysis
-        uses: github/codeql-action/analyze@b20883b0cd1f46c72ae0ba6d1090936928f9fa30 # v4.32.0
+        uses: github/codeql-action/analyze@45cbd0c69e560cd9e7cd7f8c32362050c9b7ded2 # v4.32.2
         with:
           category: "/language:${{matrix.language}}"

.pre-commit-config.yaml

@@ -11,7 +11,7 @@ ci:
 repos:
   - repo: https://github.com/astral-sh/ruff-pre-commit
     # Ruff version.
-    rev: v0.14.14
+    rev: v0.15.0
     hooks:
       # Run the linter.
       - id: ruff

CODEOWNERS

@@ -104,6 +104,7 @@ esphome/components/cc1101/* @gabest11 @lygris
 esphome/components/ccs811/* @habbie
 esphome/components/cd74hc4067/* @asoehlke
 esphome/components/ch422g/* @clydebarrow @jesterret
+esphome/components/ch423/* @dwmw2
 esphome/components/chsc6x/* @kkosik20
 esphome/components/climate/* @esphome/core
 esphome/components/climate_ir/* @glmnet
@@ -133,6 +134,7 @@ esphome/components/dfplayer/* @glmnet
 esphome/components/dfrobot_sen0395/* @niklasweber
 esphome/components/dht/* @OttoWinter
 esphome/components/display_menu_base/* @numo68
+esphome/components/dlms_meter/* @SimonFischer04
 esphome/components/dps310/* @kbx81
 esphome/components/ds1307/* @badbadc0ffee
 esphome/components/ds2484/* @mrk-its
@@ -530,7 +532,7 @@ esphome/components/uart/packet_transport/* @clydebarrow
 esphome/components/udp/* @clydebarrow
 esphome/components/ufire_ec/* @pvizeli
 esphome/components/ufire_ise/* @pvizeli
-esphome/components/ultrasonic/* @OttoWinter
+esphome/components/ultrasonic/* @ssieb @swoboda1337
 esphome/components/update/* @jesserockz
 esphome/components/uponor_smatrix/* @kroimon
 esphome/components/usb_cdc_acm/* @kbx81

esphome/__main__.py

@@ -294,8 +294,13 @@ def has_api() -> bool:
 
 
 def has_ota() -> bool:
-    """Check if OTA is available."""
+    """Check if OTA upload is available (requires platform: esphome)."""
-    return CONF_OTA in CORE.config
+    if CONF_OTA not in CORE.config:
+        return False
+    return any(
+        ota_item.get(CONF_PLATFORM) == CONF_ESPHOME
+        for ota_item in CORE.config[CONF_OTA]
+    )
 
 
 def has_mqtt_ip_lookup() -> bool:

esphome/analyze_memory/__init__.py

@@ -12,7 +12,6 @@ from .const import (
     CORE_SUBCATEGORY_PATTERNS,
     DEMANGLED_PATTERNS,
     ESPHOME_COMPONENT_PATTERN,
-    SECTION_TO_ATTR,
     SYMBOL_PATTERNS,
 )
 from .demangle import batch_demangle
@@ -91,6 +90,17 @@ class ComponentMemory:
     bss_size: int = 0  # Uninitialized data (ram only)
     symbol_count: int = 0
 
+    def add_section_size(self, section_name: str, size: int) -> None:
+        """Add size to the appropriate attribute for a section."""
+        if section_name == ".text":
+            self.text_size += size
+        elif section_name == ".rodata":
+            self.rodata_size += size
+        elif section_name == ".data":
+            self.data_size += size
+        elif section_name == ".bss":
+            self.bss_size += size
+
     @property
     def flash_total(self) -> int:
         """Total flash usage (text + rodata + data)."""
@@ -167,12 +177,15 @@ class MemoryAnalyzer:
         self._elf_symbol_names: set[str] = set()
         # SDK symbols not in ELF (static/local symbols from closed-source libs)
         self._sdk_symbols: list[SDKSymbol] = []
+        # CSWTCH symbols: list of (name, size, source_file, component)
+        self._cswtch_symbols: list[tuple[str, int, str, str]] = []
 
     def analyze(self) -> dict[str, ComponentMemory]:
         """Analyze the ELF file and return component memory usage."""
         self._parse_sections()
         self._parse_symbols()
         self._categorize_symbols()
+        self._analyze_cswtch_symbols()
         self._analyze_sdk_libraries()
         return dict(self.components)
 
@@ -255,8 +268,7 @@ class MemoryAnalyzer:
                 comp_mem.symbol_count += 1
 
                 # Update the appropriate size attribute based on section
-                if attr_name := SECTION_TO_ATTR.get(section_name):
+                comp_mem.add_section_size(section_name, size)
-                    setattr(comp_mem, attr_name, getattr(comp_mem, attr_name) + size)
 
                 # Track uncategorized symbols
                 if component == "other" and size > 0:
@@ -372,6 +384,205 @@ class MemoryAnalyzer:
 
         return "Other Core"
 
+    def _find_object_files_dir(self) -> Path | None:
+        """Find the directory containing object files for this build.
+
+        Returns:
+            Path to the directory containing .o files, or None if not found.
+        """
+        # The ELF is typically at .pioenvs/<env>/firmware.elf
+        # Object files are in .pioenvs/<env>/src/ and .pioenvs/<env>/lib*/
+        pioenvs_dir = self.elf_path.parent
+        if pioenvs_dir.exists() and any(pioenvs_dir.glob("src/*.o")):
+            return pioenvs_dir
+        return None
+
+    def _scan_cswtch_in_objects(
+        self, obj_dir: Path
+    ) -> dict[str, list[tuple[str, int]]]:
+        """Scan object files for CSWTCH symbols using a single nm invocation.
+
+        Uses ``nm --print-file-name -S`` on all ``.o`` files at once.
+        Output format: ``/path/to/file.o:address size type name``
+
+        Args:
+            obj_dir: Directory containing object files (.pioenvs/<env>/)
+
+        Returns:
+            Dict mapping "CSWTCH$NNN:size" to list of (source_file, size) tuples.
+        """
+        cswtch_map: dict[str, list[tuple[str, int]]] = defaultdict(list)
+
+        if not self.nm_path:
+            return cswtch_map
+
+        # Find all .o files recursively, sorted for deterministic output
+        obj_files = sorted(obj_dir.rglob("*.o"))
+        if not obj_files:
+            return cswtch_map
+
+        _LOGGER.debug("Scanning %d object files for CSWTCH symbols", len(obj_files))
+
+        # Single nm call with --print-file-name for all object files
+        result = run_tool(
+            [self.nm_path, "--print-file-name", "-S"] + [str(f) for f in obj_files],
+            timeout=30,
+        )
+        if result is None or result.returncode != 0:
+            return cswtch_map
+
+        for line in result.stdout.splitlines():
+            if "CSWTCH$" not in line:
+                continue
+
+            # Split on last ":" that precedes a hex address.
+            # nm --print-file-name format: filepath:hex_addr hex_size type name
+            # We split from the right: find the last colon followed by hex digits.
+            parts_after_colon = line.rsplit(":", 1)
+            if len(parts_after_colon) != 2:
+                continue
+
+            file_path = parts_after_colon[0]
+            fields = parts_after_colon[1].split()
+            # fields: [address, size, type, name]
+            if len(fields) < 4:
+                continue
+
+            sym_name = fields[3]
+            if not sym_name.startswith("CSWTCH$"):
+                continue
+
+            try:
+                size = int(fields[1], 16)
+            except ValueError:
+                continue
+
+            # Get relative path from obj_dir for readability
+            try:
+                rel_path = str(Path(file_path).relative_to(obj_dir))
+            except ValueError:
+                rel_path = file_path
+
+            key = f"{sym_name}:{size}"
+            cswtch_map[key].append((rel_path, size))
+
+        return cswtch_map
+
+    def _source_file_to_component(self, source_file: str) -> str:
+        """Map a source object file path to its component name.
+
+        Args:
+            source_file: Relative path like 'src/esphome/components/wifi/wifi_component.cpp.o'
+
+        Returns:
+            Component name like '[esphome]wifi' or the source file if unknown.
+        """
+        parts = Path(source_file).parts
+
+        # ESPHome component: src/esphome/components/<name>/...
+        if "components" in parts:
+            idx = parts.index("components")
+            if idx + 1 < len(parts):
+                component_name = parts[idx + 1]
+                if component_name in get_esphome_components():
+                    return f"{_COMPONENT_PREFIX_ESPHOME}{component_name}"
+                if component_name in self.external_components:
+                    return f"{_COMPONENT_PREFIX_EXTERNAL}{component_name}"
+
+        # ESPHome core: src/esphome/core/... or src/esphome/...
+        if "core" in parts and "esphome" in parts:
+            return _COMPONENT_CORE
+        if "esphome" in parts and "components" not in parts:
+            return _COMPONENT_CORE
+
+        # Framework/library files - return the first path component
+        # e.g., lib65b/ESPAsyncTCP/... -> lib65b
+        #        FrameworkArduino/... -> FrameworkArduino
+        return parts[0] if parts else source_file
+
+    def _analyze_cswtch_symbols(self) -> None:
+        """Analyze CSWTCH (GCC switch table) symbols by tracing to source objects.
+
+        CSWTCH symbols are compiler-generated lookup tables for switch statements.
+        They are local symbols, so the same name can appear in different object files.
+        This method scans .o files to attribute them to their source components.
+        """
+        obj_dir = self._find_object_files_dir()
+        if obj_dir is None:
+            _LOGGER.debug("No object files directory found, skipping CSWTCH analysis")
+            return
+
+        # Scan object files for CSWTCH symbols
+        cswtch_map = self._scan_cswtch_in_objects(obj_dir)
+        if not cswtch_map:
+            _LOGGER.debug("No CSWTCH symbols found in object files")
+            return
+
+        # Collect CSWTCH symbols from the ELF (already parsed in sections)
+        # Include section_name for re-attribution of component totals
+        elf_cswtch = [
+            (symbol_name, size, section_name)
+            for section_name, section in self.sections.items()
+            for symbol_name, size, _ in section.symbols
+            if symbol_name.startswith("CSWTCH$")
+        ]
+
+        _LOGGER.debug(
+            "Found %d CSWTCH symbols in ELF, %d unique in object files",
+            len(elf_cswtch),
+            len(cswtch_map),
+        )
+
+        # Match ELF CSWTCH symbols to source files and re-attribute component totals.
+        # _categorize_symbols() already ran and put these into "other" since CSWTCH$
+        # names don't match any component pattern. We move the bytes to the correct
+        # component based on the object file mapping.
+        other_mem = self.components.get("other")
+
+        for sym_name, size, section_name in elf_cswtch:
+            key = f"{sym_name}:{size}"
+            sources = cswtch_map.get(key, [])
+
+            if len(sources) == 1:
+                source_file = sources[0][0]
+                component = self._source_file_to_component(source_file)
+            elif len(sources) > 1:
+                # Ambiguous - multiple object files have same CSWTCH name+size
+                source_file = "ambiguous"
+                component = "ambiguous"
+                _LOGGER.debug(
+                    "Ambiguous CSWTCH %s (%d B) found in %d files: %s",
+                    sym_name,
+                    size,
+                    len(sources),
+                    ", ".join(src for src, _ in sources),
+                )
+            else:
+                source_file = "unknown"
+                component = "unknown"
+
+            self._cswtch_symbols.append((sym_name, size, source_file, component))
+
+            # Re-attribute from "other" to the correct component
+            if (
+                component not in ("other", "unknown", "ambiguous")
+                and other_mem is not None
+            ):
+                other_mem.add_section_size(section_name, -size)
+                if component not in self.components:
+                    self.components[component] = ComponentMemory(component)
+                self.components[component].add_section_size(section_name, size)
+
+        # Sort by size descending
+        self._cswtch_symbols.sort(key=lambda x: x[1], reverse=True)
+
+        total_size = sum(size for _, size, _, _ in self._cswtch_symbols)
+        _LOGGER.debug(
+            "CSWTCH analysis: %d symbols, %d bytes total",
+            len(self._cswtch_symbols),
+            total_size,
+        )
+
     def get_unattributed_ram(self) -> tuple[int, int, int]:
         """Get unattributed RAM sizes (SDK/framework overhead).
 

esphome/analyze_memory/cli.py

@@ -4,6 +4,8 @@ from __future__ import annotations
 
 from collections import defaultdict
 from collections.abc import Callable
+import heapq
+from operator import itemgetter
 import sys
 from typing import TYPE_CHECKING
 
@@ -29,6 +31,10 @@ class MemoryAnalyzerCLI(MemoryAnalyzer):
     )
     # Lower threshold for RAM symbols (RAM is more constrained)
     RAM_SYMBOL_SIZE_THRESHOLD: int = 24
+    # Number of top symbols to show in the largest symbols report
+    TOP_SYMBOLS_LIMIT: int = 30
+    # Width for symbol name display in top symbols report
+    COL_TOP_SYMBOL_NAME: int = 55
 
     # Column width constants
     COL_COMPONENT: int = 29
@@ -147,6 +153,83 @@ class MemoryAnalyzerCLI(MemoryAnalyzer):
             section_label = f" [{section[1:]}]"  # .data -> [data], .bss -> [bss]
         return f"{demangled} ({size:,} B){section_label}"
 
+    def _add_top_symbols(self, lines: list[str]) -> None:
+        """Add a section showing the top largest symbols in the binary."""
+        # Collect all symbols from all components: (symbol, demangled, size, section, component)
+        all_symbols = [
+            (symbol, demangled, size, section, component)
+            for component, symbols in self._component_symbols.items()
+            for symbol, demangled, size, section in symbols
+        ]
+
+        # Get top N symbols by size using heapq for efficiency
+        top_symbols = heapq.nlargest(
+            self.TOP_SYMBOLS_LIMIT, all_symbols, key=itemgetter(2)
+        )
+
+        lines.append("")
+        lines.append(f"Top {self.TOP_SYMBOLS_LIMIT} Largest Symbols:")
+        # Calculate truncation limit from column width (leaving room for "...")
+        truncate_limit = self.COL_TOP_SYMBOL_NAME - 3
+        for i, (_, demangled, size, section, component) in enumerate(top_symbols):
+            # Format section label
+            section_label = f"[{section[1:]}]" if section else ""
+            # Truncate demangled name if too long
+            demangled_display = (
+                f"{demangled[:truncate_limit]}..."
+                if len(demangled) > self.COL_TOP_SYMBOL_NAME
+                else demangled
+            )
+            lines.append(
+                f"{i + 1:>2}. {size:>7,} B {section_label:<8} {demangled_display:<{self.COL_TOP_SYMBOL_NAME}} {component}"
+            )
+
+    def _add_cswtch_analysis(self, lines: list[str]) -> None:
+        """Add CSWTCH (GCC switch table lookup) analysis section."""
+        self._add_section_header(lines, "CSWTCH Analysis (GCC Switch Table Lookups)")
+
+        total_size = sum(size for _, size, _, _ in self._cswtch_symbols)
+        lines.append(
+            f"Total: {len(self._cswtch_symbols)} switch table(s), {total_size:,} B"
+        )
+        lines.append("")
+
+        # Group by component
+        by_component: dict[str, list[tuple[str, int, str]]] = defaultdict(list)
+        for sym_name, size, source_file, component in self._cswtch_symbols:
+            by_component[component].append((sym_name, size, source_file))
+
+        # Sort components by total size descending
+        sorted_components = sorted(
+            by_component.items(),
+            key=lambda x: sum(s[1] for s in x[1]),
+            reverse=True,
+        )
+
+        for component, symbols in sorted_components:
+            comp_total = sum(s[1] for s in symbols)
+            lines.append(f"{component} ({comp_total:,} B, {len(symbols)} tables):")
+
+            # Group by source file within component
+            by_file: dict[str, list[tuple[str, int]]] = defaultdict(list)
+            for sym_name, size, source_file in symbols:
+                by_file[source_file].append((sym_name, size))
+
+            for source_file, file_symbols in sorted(
+                by_file.items(),
+                key=lambda x: sum(s[1] for s in x[1]),
+                reverse=True,
+            ):
+                file_total = sum(s[1] for s in file_symbols)
+                lines.append(
+                    f"  {source_file} ({file_total:,} B, {len(file_symbols)} tables)"
+                )
+                for sym_name, size in sorted(
+                    file_symbols, key=lambda x: x[1], reverse=True
+                ):
+                    lines.append(f"    {size:>6,} B  {sym_name}")
+            lines.append("")
+
     def generate_report(self, detailed: bool = False) -> str:
         """Generate a formatted memory report."""
         components = sorted(
@@ -248,6 +331,9 @@ class MemoryAnalyzerCLI(MemoryAnalyzer):
             "RAM",
         )
 
+        # Top largest symbols in the binary
+        self._add_top_symbols(lines)
+
         # Add ESPHome core detailed analysis if there are core symbols
         if self._esphome_core_symbols:
             self._add_section_header(lines, f"{_COMPONENT_CORE} Detailed Analysis")
@@ -431,6 +517,10 @@ class MemoryAnalyzerCLI(MemoryAnalyzer):
                     lines.append(f"    ... and {len(large_ram_syms) - 10} more")
             lines.append("")
 
+        # CSWTCH (GCC switch table) analysis
+        if self._cswtch_symbols:
+            self._add_cswtch_analysis(lines)
+
         lines.append(
             "Note: This analysis covers symbols in the ELF file. Some runtime allocations may not be included."
         )

esphome/analyze_memory/const.py

@@ -66,15 +66,6 @@ SECTION_MAPPING = {
     ),
 }
 
-# Section to ComponentMemory attribute mapping
-# Maps section names to the attribute name in ComponentMemory dataclass
-SECTION_TO_ATTR = {
-    ".text": "text_size",
-    ".rodata": "rodata_size",
-    ".data": "data_size",
-    ".bss": "bss_size",
-}
-
 # Component identification rules
 # Symbol patterns: patterns found in raw symbol names
 SYMBOL_PATTERNS = {
@@ -513,7 +504,9 @@ SYMBOL_PATTERNS = {
         "__FUNCTION__$",
         "DAYS_IN_MONTH",
         "_DAYS_BEFORE_MONTH",
-        "CSWTCH$",
+        # Note: CSWTCH$ symbols are GCC switch table lookup tables.
+        # They are attributed to their source object files via _analyze_cswtch_symbols()
+        # rather than being lumped into libc.
         "dst$",
         "sulp",
         "_strtol_l",  # String to long with locale

esphome/codegen.py

@@ -87,6 +87,7 @@ from esphome.cpp_types import (  # noqa: F401
     size_t,
     std_ns,
     std_shared_ptr,
+    std_span,
     std_string,
     std_string_ref,
     std_vector,

esphome/components/absolute_humidity/absolute_humidity.cpp

@@ -45,8 +45,6 @@ void AbsoluteHumidityComponent::dump_config() {
                 this->temperature_sensor_->get_name().c_str(), this->humidity_sensor_->get_name().c_str());
 }
 
-float AbsoluteHumidityComponent::get_setup_priority() const { return setup_priority::DATA; }
-
 void AbsoluteHumidityComponent::loop() {
   if (!this->next_update_) {
     return;

esphome/components/absolute_humidity/absolute_humidity.h

@@ -24,7 +24,6 @@ class AbsoluteHumidityComponent : public sensor::Sensor, public Component {
 
   void setup() override;
   void dump_config() override;
-  float get_setup_priority() const override;
   void loop() override;
 
  protected:

esphome/components/adc/adc_sensor.h

@@ -68,11 +68,6 @@ class ADCSensor : public sensor::Sensor, public PollingComponent, public voltage
   /// This method is called during the ESPHome setup process to log the configuration.
   void dump_config() override;
 
-  /// Return the setup priority for this component.
-  /// Components with higher priority are initialized earlier during setup.
-  /// @return A float representing the setup priority.
-  float get_setup_priority() const override;
-
 #ifdef USE_ZEPHYR
   /// Set the ADC channel to be used by the ADC sensor.
   /// @param channel Pointer to an adc_dt_spec structure representing the ADC channel.

esphome/components/adc/adc_sensor_common.cpp

@@ -79,7 +79,5 @@ void ADCSensor::set_sample_count(uint8_t sample_count) {
 
 void ADCSensor::set_sampling_mode(SamplingMode sampling_mode) { this->sampling_mode_ = sampling_mode; }
 
-float ADCSensor::get_setup_priority() const { return setup_priority::DATA; }
-
 }  // namespace adc
 }  // namespace esphome

esphome/components/adc/adc_sensor_esp32.cpp

@@ -42,11 +42,11 @@ void ADCSensor::setup() {
     adc_oneshot_unit_init_cfg_t init_config = {};  // Zero initialize
     init_config.unit_id = this->adc_unit_;
     init_config.ulp_mode = ADC_ULP_MODE_DISABLE;
-#if USE_ESP32_VARIANT_ESP32C3 || USE_ESP32_VARIANT_ESP32C5 || USE_ESP32_VARIANT_ESP32C6 || \
+#if USE_ESP32_VARIANT_ESP32C2 || USE_ESP32_VARIANT_ESP32C3 || USE_ESP32_VARIANT_ESP32C5 || \
-    USE_ESP32_VARIANT_ESP32C61 || USE_ESP32_VARIANT_ESP32H2
+    USE_ESP32_VARIANT_ESP32C6 || USE_ESP32_VARIANT_ESP32C61 || USE_ESP32_VARIANT_ESP32H2
     init_config.clk_src = ADC_DIGI_CLK_SRC_DEFAULT;
-#endif  // USE_ESP32_VARIANT_ESP32C3 || USE_ESP32_VARIANT_ESP32C5 || USE_ESP32_VARIANT_ESP32C6 ||
+#endif  // USE_ESP32_VARIANT_ESP32C2 || USE_ESP32_VARIANT_ESP32C3 || USE_ESP32_VARIANT_ESP32C5 ||
-        // USE_ESP32_VARIANT_ESP32C61 || USE_ESP32_VARIANT_ESP32H2
+        // USE_ESP32_VARIANT_ESP32C6 || USE_ESP32_VARIANT_ESP32C61 || USE_ESP32_VARIANT_ESP32H2
     esp_err_t err = adc_oneshot_new_unit(&init_config, &ADCSensor::shared_adc_handles[this->adc_unit_]);
     if (err != ESP_OK) {
       ESP_LOGE(TAG, "Error initializing %s: %d", LOG_STR_ARG(adc_unit_to_str(this->adc_unit_)), err);
@@ -76,7 +76,7 @@ void ADCSensor::setup() {
 
 #if USE_ESP32_VARIANT_ESP32C3 || USE_ESP32_VARIANT_ESP32C5 || USE_ESP32_VARIANT_ESP32C6 || \
     USE_ESP32_VARIANT_ESP32C61 || USE_ESP32_VARIANT_ESP32H2 || USE_ESP32_VARIANT_ESP32P4 || USE_ESP32_VARIANT_ESP32S3
-    // RISC-V variants and S3 use curve fitting calibration
+    // RISC-V variants (except C2) and S3 use curve fitting calibration
     adc_cali_curve_fitting_config_t cali_config = {};  // Zero initialize first
 #if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5, 3, 0)
     cali_config.chan = this->channel_;
@@ -94,14 +94,14 @@ void ADCSensor::setup() {
       ESP_LOGW(TAG, "Curve fitting calibration failed with error %d, will use uncalibrated readings", err);
       this->setup_flags_.calibration_complete = false;
     }
-#else  // Other ESP32 variants use line fitting calibration
+#else  // ESP32, ESP32-S2, and ESP32-C2 use line fitting calibration
     adc_cali_line_fitting_config_t cali_config = {
       .unit_id = this->adc_unit_,
       .atten = this->attenuation_,
       .bitwidth = ADC_BITWIDTH_DEFAULT,
-#if !defined(USE_ESP32_VARIANT_ESP32S2)
+#if !defined(USE_ESP32_VARIANT_ESP32S2) && !defined(USE_ESP32_VARIANT_ESP32C2)
       .default_vref = 1100,  // Default reference voltage in mV
-#endif  // !defined(USE_ESP32_VARIANT_ESP32S2)
+#endif  // !defined(USE_ESP32_VARIANT_ESP32S2) && !defined(USE_ESP32_VARIANT_ESP32C2)
     };
     err = adc_cali_create_scheme_line_fitting(&cali_config, &handle);
     if (err == ESP_OK) {
@@ -112,7 +112,7 @@ void ADCSensor::setup() {
       ESP_LOGW(TAG, "Line fitting calibration failed with error %d, will use uncalibrated readings", err);
       this->setup_flags_.calibration_complete = false;
     }
-#endif  // USE_ESP32_VARIANT_ESP32C3 || ESP32C5 || ESP32C6 || ESP32C61 || ESP32H2 || ESP32P4 || ESP32S3
+#endif  // ESP32C3 || ESP32C5 || ESP32C6 || ESP32C61 || ESP32H2 || ESP32P4 || ESP32S3
   }
 
   this->setup_flags_.init_complete = true;
@@ -189,7 +189,7 @@ float ADCSensor::sample_fixed_attenuation_() {
         adc_cali_delete_scheme_curve_fitting(this->calibration_handle_);
 #else   // Other ESP32 variants use line fitting calibration
         adc_cali_delete_scheme_line_fitting(this->calibration_handle_);
-#endif  // USE_ESP32_VARIANT_ESP32C3 || ESP32C5 || ESP32C6 || ESP32C61 || ESP32H2 || ESP32P4 || ESP32S3
+#endif  // ESP32C3 || ESP32C5 || ESP32C6 || ESP32C61 || ESP32H2 || ESP32P4 || ESP32S3
         this->calibration_handle_ = nullptr;
       }
     }
@@ -247,7 +247,7 @@ float ADCSensor::sample_autorange_() {
       .unit_id = this->adc_unit_,
       .atten = atten,
       .bitwidth = ADC_BITWIDTH_DEFAULT,
-#if !defined(USE_ESP32_VARIANT_ESP32S2)
+#if !defined(USE_ESP32_VARIANT_ESP32S2) && !defined(USE_ESP32_VARIANT_ESP32C2)
       .default_vref = 1100,
 #endif
     };

esphome/components/adc/sensor.py

@@ -2,7 +2,7 @@ import logging
 
 import esphome.codegen as cg
 from esphome.components import sensor, voltage_sampler
-from esphome.components.esp32 import get_esp32_variant
+from esphome.components.esp32 import get_esp32_variant, include_builtin_idf_component
 from esphome.components.nrf52.const import AIN_TO_GPIO, EXTRA_ADC
 from esphome.components.zephyr import (
     zephyr_add_overlay,
@@ -118,6 +118,9 @@ async def to_code(config):
     cg.add(var.set_sampling_mode(config[CONF_SAMPLING_MODE]))
 
     if CORE.is_esp32:
+        # Re-enable ESP-IDF's ADC driver (excluded by default to save compile time)
+        include_builtin_idf_component("esp_adc")
+
         if attenuation := config.get(CONF_ATTENUATION):
             if attenuation == "auto":
                 cg.add(var.set_autorange(cg.global_ns.true))

esphome/components/adc128s102/sensor/adc128s102_sensor.cpp

@@ -9,8 +9,6 @@ static const char *const TAG = "adc128s102.sensor";
 
 ADC128S102Sensor::ADC128S102Sensor(uint8_t channel) : channel_(channel) {}
 
-float ADC128S102Sensor::get_setup_priority() const { return setup_priority::DATA; }
-
 void ADC128S102Sensor::dump_config() {
   LOG_SENSOR("", "ADC128S102 Sensor", this);
   ESP_LOGCONFIG(TAG, "  Pin: %u", this->channel_);

esphome/components/adc128s102/sensor/adc128s102_sensor.h

@@ -19,7 +19,6 @@ class ADC128S102Sensor : public PollingComponent,
 
   void update() override;
   void dump_config() override;
-  float get_setup_priority() const override;
   float sample() override;
 
  protected:

esphome/components/aht10/aht10.cpp

@@ -150,8 +150,6 @@ void AHT10Component::update() {
   this->restart_read_();
 }
 
-float AHT10Component::get_setup_priority() const { return setup_priority::DATA; }
-
 void AHT10Component::dump_config() {
   ESP_LOGCONFIG(TAG, "AHT10:");
   LOG_I2C_DEVICE(this);

esphome/components/aht10/aht10.h

@@ -16,7 +16,6 @@ class AHT10Component : public PollingComponent, public i2c::I2CDevice {
   void setup() override;
   void update() override;
   void dump_config() override;
-  float get_setup_priority() const override;
   void set_variant(AHT10Variant variant) { this->variant_ = variant; }
 
   void set_temperature_sensor(sensor::Sensor *temperature_sensor) { temperature_sensor_ = temperature_sensor; }

esphome/components/alarm_control_panel/alarm_control_panel_state.cpp

@@ -1,32 +1,15 @@
 #include "alarm_control_panel_state.h"
+#include "esphome/core/progmem.h"
 
 namespace esphome::alarm_control_panel {
 
+// Alarm control panel state strings indexed by AlarmControlPanelState enum (0-9)
+PROGMEM_STRING_TABLE(AlarmControlPanelStateStrings, "DISARMED", "ARMED_HOME", "ARMED_AWAY", "ARMED_NIGHT",
+                     "ARMED_VACATION", "ARMED_CUSTOM_BYPASS", "PENDING", "ARMING", "DISARMING", "TRIGGERED", "UNKNOWN");
+
 const LogString *alarm_control_panel_state_to_string(AlarmControlPanelState state) {
-  switch (state) {
+  return AlarmControlPanelStateStrings::get_log_str(static_cast<uint8_t>(state),
-    case ACP_STATE_DISARMED:
+                                                    AlarmControlPanelStateStrings::LAST_INDEX);
-      return LOG_STR("DISARMED");
-    case ACP_STATE_ARMED_HOME:
-      return LOG_STR("ARMED_HOME");
-    case ACP_STATE_ARMED_AWAY:
-      return LOG_STR("ARMED_AWAY");
-    case ACP_STATE_ARMED_NIGHT:
-      return LOG_STR("ARMED_NIGHT");
-    case ACP_STATE_ARMED_VACATION:
-      return LOG_STR("ARMED_VACATION");
-    case ACP_STATE_ARMED_CUSTOM_BYPASS:
-      return LOG_STR("ARMED_CUSTOM_BYPASS");
-    case ACP_STATE_PENDING:
-      return LOG_STR("PENDING");
-    case ACP_STATE_ARMING:
-      return LOG_STR("ARMING");
-    case ACP_STATE_DISARMING:
-      return LOG_STR("DISARMING");
-    case ACP_STATE_TRIGGERED:
-      return LOG_STR("TRIGGERED");
-    default:
-      return LOG_STR("UNKNOWN");
-  }
 }
 
 }  // namespace esphome::alarm_control_panel

esphome/components/am2315c/am2315c.cpp

@@ -176,7 +176,5 @@ void AM2315C::dump_config() {
   LOG_SENSOR("  ", "Humidity", this->humidity_sensor_);
 }
 
-float AM2315C::get_setup_priority() const { return setup_priority::DATA; }
-
 }  // namespace am2315c
 }  // namespace esphome

esphome/components/am2315c/am2315c.h

@@ -33,7 +33,6 @@ class AM2315C : public PollingComponent, public i2c::I2CDevice {
   void dump_config() override;
   void update() override;
   void setup() override;
-  float get_setup_priority() const override;
 
   void set_temperature_sensor(sensor::Sensor *temperature_sensor) { this->temperature_sensor_ = temperature_sensor; }
   void set_humidity_sensor(sensor::Sensor *humidity_sensor) { this->humidity_sensor_ = humidity_sensor; }

esphome/components/am2320/am2320.cpp

@@ -51,7 +51,6 @@ void AM2320Component::dump_config() {
   LOG_SENSOR("  ", "Temperature", this->temperature_sensor_);
   LOG_SENSOR("  ", "Humidity", this->humidity_sensor_);
 }
-float AM2320Component::get_setup_priority() const { return setup_priority::DATA; }
 
 bool AM2320Component::read_bytes_(uint8_t a_register, uint8_t *data, uint8_t len, uint32_t conversion) {
   if (!this->write_bytes(a_register, data, 2)) {

esphome/components/am2320/am2320.h

@@ -11,7 +11,6 @@ class AM2320Component : public PollingComponent, public i2c::I2CDevice {
  public:
   void setup() override;
   void dump_config() override;
-  float get_setup_priority() const override;
   void update() override;
 
   void set_temperature_sensor(sensor::Sensor *temperature_sensor) { temperature_sensor_ = temperature_sensor; }

esphome/components/apds9960/apds9960.cpp

@@ -384,7 +384,6 @@ void APDS9960::process_dataset_(int up, int down, int left, int right) {
     }
   }
 }
-float APDS9960::get_setup_priority() const { return setup_priority::DATA; }
 bool APDS9960::is_proximity_enabled_() const {
   return
 #ifdef USE_SENSOR

esphome/components/apds9960/apds9960.h

@@ -32,7 +32,6 @@ class APDS9960 : public PollingComponent, public i2c::I2CDevice {
  public:
   void setup() override;
   void dump_config() override;
-  float get_setup_priority() const override;
   void update() override;
   void loop() override;
 

esphome/components/api/api.proto

@@ -45,6 +45,7 @@ service APIConnection {
   rpc time_command (TimeCommandRequest) returns (void) {}
   rpc update_command (UpdateCommandRequest) returns (void) {}
   rpc valve_command (ValveCommandRequest) returns (void) {}
+  rpc water_heater_command (WaterHeaterCommandRequest) returns (void) {}
 
   rpc subscribe_bluetooth_le_advertisements(SubscribeBluetoothLEAdvertisementsRequest) returns (void) {}
   rpc bluetooth_device_request(BluetoothDeviceRequest) returns (void) {}

esphome/components/api/api_connection.cpp

@@ -300,7 +300,7 @@ void APIConnection::on_disconnect_response(const DisconnectResponse &value) {
 // Encodes a message to the buffer and returns the total number of bytes used,
 // including header and footer overhead. Returns 0 if the message doesn't fit.
 uint16_t APIConnection::encode_message_to_buffer(ProtoMessage &msg, uint8_t message_type, APIConnection *conn,
-                                                 uint32_t remaining_size, bool is_single) {
+                                                 uint32_t remaining_size) {
 #ifdef HAS_PROTO_MESSAGE_DUMP
   // If in log-only mode, just log and return
   if (conn->flags_.log_only_mode) {
@@ -330,12 +330,9 @@ uint16_t APIConnection::encode_message_to_buffer(ProtoMessage &msg, uint8_t mess
   // Get buffer size after allocation (which includes header padding)
   std::vector<uint8_t> &shared_buf = conn->parent_->get_shared_buffer_ref();
 
-  if (is_single || conn->flags_.batch_first_message) {
+  if (conn->flags_.batch_first_message) {
-    // Single message or first batch message
+    // First message - buffer already prepared by caller, just clear flag
-    conn->prepare_first_message_buffer(shared_buf, header_padding, total_calculated_size);
+    conn->flags_.batch_first_message = false;
-    if (conn->flags_.batch_first_message) {
-      conn->flags_.batch_first_message = false;
-    }
   } else {
     // Batch message second or later
     // Add padding for previous message footer + this message header
@@ -365,24 +362,22 @@ bool APIConnection::send_binary_sensor_state(binary_sensor::BinarySensor *binary
                                    BinarySensorStateResponse::ESTIMATED_SIZE);
 }
 
-uint16_t APIConnection::try_send_binary_sensor_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+uint16_t APIConnection::try_send_binary_sensor_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size) {
-                                                     bool is_single) {
   auto *binary_sensor = static_cast<binary_sensor::BinarySensor *>(entity);
   BinarySensorStateResponse resp;
   resp.state = binary_sensor->state;
   resp.missing_state = !binary_sensor->has_state();
   return fill_and_encode_entity_state(binary_sensor, resp, BinarySensorStateResponse::MESSAGE_TYPE, conn,
-                                      remaining_size, is_single);
+                                      remaining_size);
 }
 
-uint16_t APIConnection::try_send_binary_sensor_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+uint16_t APIConnection::try_send_binary_sensor_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size) {
-                                                    bool is_single) {
   auto *binary_sensor = static_cast<binary_sensor::BinarySensor *>(entity);
   ListEntitiesBinarySensorResponse msg;
   msg.device_class = binary_sensor->get_device_class_ref();
   msg.is_status_binary_sensor = binary_sensor->is_status_binary_sensor();
   return fill_and_encode_entity_info(binary_sensor, msg, ListEntitiesBinarySensorResponse::MESSAGE_TYPE, conn,
-                                     remaining_size, is_single);
+                                     remaining_size);
 }
 #endif
 
@@ -390,8 +385,7 @@ uint16_t APIConnection::try_send_binary_sensor_info(EntityBase *entity, APIConne
 bool APIConnection::send_cover_state(cover::Cover *cover) {
   return this->send_message_smart_(cover, CoverStateResponse::MESSAGE_TYPE, CoverStateResponse::ESTIMATED_SIZE);
 }
-uint16_t APIConnection::try_send_cover_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+uint16_t APIConnection::try_send_cover_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size) {
-                                             bool is_single) {
   auto *cover = static_cast<cover::Cover *>(entity);
   CoverStateResponse msg;
   auto traits = cover->get_traits();
@@ -399,10 +393,9 @@ uint16_t APIConnection::try_send_cover_state(EntityBase *entity, APIConnection *
   if (traits.get_supports_tilt())
     msg.tilt = cover->tilt;
   msg.current_operation = static_cast<enums::CoverOperation>(cover->current_operation);
-  return fill_and_encode_entity_state(cover, msg, CoverStateResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
+  return fill_and_encode_entity_state(cover, msg, CoverStateResponse::MESSAGE_TYPE, conn, remaining_size);
 }
-uint16_t APIConnection::try_send_cover_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+uint16_t APIConnection::try_send_cover_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size) {
-                                            bool is_single) {
   auto *cover = static_cast<cover::Cover *>(entity);
   ListEntitiesCoverResponse msg;
   auto traits = cover->get_traits();
@@ -411,8 +404,7 @@ uint16_t APIConnection::try_send_cover_info(EntityBase *entity, APIConnection *c
   msg.supports_tilt = traits.get_supports_tilt();
   msg.supports_stop = traits.get_supports_stop();
   msg.device_class = cover->get_device_class_ref();
-  return fill_and_encode_entity_info(cover, msg, ListEntitiesCoverResponse::MESSAGE_TYPE, conn, remaining_size,
+  return fill_and_encode_entity_info(cover, msg, ListEntitiesCoverResponse::MESSAGE_TYPE, conn, remaining_size);
-                                     is_single);
 }
 void APIConnection::cover_command(const CoverCommandRequest &msg) {
   ENTITY_COMMAND_MAKE_CALL(cover::Cover, cover, cover)
@@ -430,8 +422,7 @@ void APIConnection::cover_command(const CoverCommandRequest &msg) {
 bool APIConnection::send_fan_state(fan::Fan *fan) {
   return this->send_message_smart_(fan, FanStateResponse::MESSAGE_TYPE, FanStateResponse::ESTIMATED_SIZE);
 }
-uint16_t APIConnection::try_send_fan_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+uint16_t APIConnection::try_send_fan_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size) {
-                                           bool is_single) {
   auto *fan = static_cast<fan::Fan *>(entity);
   FanStateResponse msg;
   auto traits = fan->get_traits();
@@ -445,10 +436,9 @@ uint16_t APIConnection::try_send_fan_state(EntityBase *entity, APIConnection *co
     msg.direction = static_cast<enums::FanDirection>(fan->direction);
   if (traits.supports_preset_modes() && fan->has_preset_mode())
     msg.preset_mode = fan->get_preset_mode();
-  return fill_and_encode_entity_state(fan, msg, FanStateResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
+  return fill_and_encode_entity_state(fan, msg, FanStateResponse::MESSAGE_TYPE, conn, remaining_size);
 }
-uint16_t APIConnection::try_send_fan_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+uint16_t APIConnection::try_send_fan_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size) {
-                                          bool is_single) {
   auto *fan = static_cast<fan::Fan *>(entity);
   ListEntitiesFanResponse msg;
   auto traits = fan->get_traits();
@@ -457,7 +447,7 @@ uint16_t APIConnection::try_send_fan_info(EntityBase *entity, APIConnection *con
   msg.supports_direction = traits.supports_direction();
   msg.supported_speed_count = traits.supported_speed_count();
   msg.supported_preset_modes = &traits.supported_preset_modes();
-  return fill_and_encode_entity_info(fan, msg, ListEntitiesFanResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
+  return fill_and_encode_entity_info(fan, msg, ListEntitiesFanResponse::MESSAGE_TYPE, conn, remaining_size);
 }
 void APIConnection::fan_command(const FanCommandRequest &msg) {
   ENTITY_COMMAND_MAKE_CALL(fan::Fan, fan, fan)
@@ -481,8 +471,7 @@ void APIConnection::fan_command(const FanCommandRequest &msg) {
 bool APIConnection::send_light_state(light::LightState *light) {
   return this->send_message_smart_(light, LightStateResponse::MESSAGE_TYPE, LightStateResponse::ESTIMATED_SIZE);
 }
-uint16_t APIConnection::try_send_light_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+uint16_t APIConnection::try_send_light_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size) {
-                                             bool is_single) {
   auto *light = static_cast<light::LightState *>(entity);
   LightStateResponse resp;
   auto values = light->remote_values;
@@ -501,10 +490,9 @@ uint16_t APIConnection::try_send_light_state(EntityBase *entity, APIConnection *
   if (light->supports_effects()) {
     resp.effect = light->get_effect_name();
   }
-  return fill_and_encode_entity_state(light, resp, LightStateResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
+  return fill_and_encode_entity_state(light, resp, LightStateResponse::MESSAGE_TYPE, conn, remaining_size);
 }
-uint16_t APIConnection::try_send_light_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+uint16_t APIConnection::try_send_light_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size) {
-                                            bool is_single) {
   auto *light = static_cast<light::LightState *>(entity);
   ListEntitiesLightResponse msg;
   auto traits = light->get_traits();
@@ -527,8 +515,7 @@ uint16_t APIConnection::try_send_light_info(EntityBase *entity, APIConnection *c
     }
   }
   msg.effects = &effects_list;
-  return fill_and_encode_entity_info(light, msg, ListEntitiesLightResponse::MESSAGE_TYPE, conn, remaining_size,
+  return fill_and_encode_entity_info(light, msg, ListEntitiesLightResponse::MESSAGE_TYPE, conn, remaining_size);
-                                     is_single);
 }
 void APIConnection::light_command(const LightCommandRequest &msg) {
   ENTITY_COMMAND_MAKE_CALL(light::LightState, light, light)
@@ -568,17 +555,15 @@ bool APIConnection::send_sensor_state(sensor::Sensor *sensor) {
   return this->send_message_smart_(sensor, SensorStateResponse::MESSAGE_TYPE, SensorStateResponse::ESTIMATED_SIZE);
 }
 
-uint16_t APIConnection::try_send_sensor_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+uint16_t APIConnection::try_send_sensor_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size) {
-                                              bool is_single) {
   auto *sensor = static_cast<sensor::Sensor *>(entity);
   SensorStateResponse resp;
   resp.state = sensor->state;
   resp.missing_state = !sensor->has_state();
-  return fill_and_encode_entity_state(sensor, resp, SensorStateResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
+  return fill_and_encode_entity_state(sensor, resp, SensorStateResponse::MESSAGE_TYPE, conn, remaining_size);
 }
 
-uint16_t APIConnection::try_send_sensor_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+uint16_t APIConnection::try_send_sensor_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size) {
-                                             bool is_single) {
   auto *sensor = static_cast<sensor::Sensor *>(entity);
   ListEntitiesSensorResponse msg;
   msg.unit_of_measurement = sensor->get_unit_of_measurement_ref();
@@ -586,8 +571,7 @@ uint16_t APIConnection::try_send_sensor_info(EntityBase *entity, APIConnection *
   msg.force_update = sensor->get_force_update();
   msg.device_class = sensor->get_device_class_ref();
   msg.state_class = static_cast<enums::SensorStateClass>(sensor->get_state_class());
-  return fill_and_encode_entity_info(sensor, msg, ListEntitiesSensorResponse::MESSAGE_TYPE, conn, remaining_size,
+  return fill_and_encode_entity_info(sensor, msg, ListEntitiesSensorResponse::MESSAGE_TYPE, conn, remaining_size);
-                                     is_single);
 }
 #endif
 
@@ -596,23 +580,19 @@ bool APIConnection::send_switch_state(switch_::Switch *a_switch) {
   return this->send_message_smart_(a_switch, SwitchStateResponse::MESSAGE_TYPE, SwitchStateResponse::ESTIMATED_SIZE);
 }
 
-uint16_t APIConnection::try_send_switch_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+uint16_t APIConnection::try_send_switch_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size) {
-                                              bool is_single) {
   auto *a_switch = static_cast<switch_::Switch *>(entity);
   SwitchStateResponse resp;
   resp.state = a_switch->state;
-  return fill_and_encode_entity_state(a_switch, resp, SwitchStateResponse::MESSAGE_TYPE, conn, remaining_size,
+  return fill_and_encode_entity_state(a_switch, resp, SwitchStateResponse::MESSAGE_TYPE, conn, remaining_size);
-                                      is_single);
 }
 
-uint16_t APIConnection::try_send_switch_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+uint16_t APIConnection::try_send_switch_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size) {
-                                             bool is_single) {
   auto *a_switch = static_cast<switch_::Switch *>(entity);
   ListEntitiesSwitchResponse msg;
   msg.assumed_state = a_switch->assumed_state();
   msg.device_class = a_switch->get_device_class_ref();
-  return fill_and_encode_entity_info(a_switch, msg, ListEntitiesSwitchResponse::MESSAGE_TYPE, conn, remaining_size,
+  return fill_and_encode_entity_info(a_switch, msg, ListEntitiesSwitchResponse::MESSAGE_TYPE, conn, remaining_size);
-                                     is_single);
 }
 void APIConnection::switch_command(const SwitchCommandRequest &msg) {
   ENTITY_COMMAND_GET(switch_::Switch, a_switch, switch)
@@ -631,22 +611,19 @@ bool APIConnection::send_text_sensor_state(text_sensor::TextSensor *text_sensor)
                                    TextSensorStateResponse::ESTIMATED_SIZE);
 }
 
-uint16_t APIConnection::try_send_text_sensor_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+uint16_t APIConnection::try_send_text_sensor_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size) {
-                                                   bool is_single) {
   auto *text_sensor = static_cast<text_sensor::TextSensor *>(entity);
   TextSensorStateResponse resp;
   resp.state = StringRef(text_sensor->state);
   resp.missing_state = !text_sensor->has_state();
-  return fill_and_encode_entity_state(text_sensor, resp, TextSensorStateResponse::MESSAGE_TYPE, conn, remaining_size,
+  return fill_and_encode_entity_state(text_sensor, resp, TextSensorStateResponse::MESSAGE_TYPE, conn, remaining_size);
-                                      is_single);
 }
-uint16_t APIConnection::try_send_text_sensor_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+uint16_t APIConnection::try_send_text_sensor_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size) {
-                                                  bool is_single) {
   auto *text_sensor = static_cast<text_sensor::TextSensor *>(entity);
   ListEntitiesTextSensorResponse msg;
   msg.device_class = text_sensor->get_device_class_ref();
   return fill_and_encode_entity_info(text_sensor, msg, ListEntitiesTextSensorResponse::MESSAGE_TYPE, conn,
-                                     remaining_size, is_single);
+                                     remaining_size);
 }
 #endif
 
@@ -654,8 +631,7 @@ uint16_t APIConnection::try_send_text_sensor_info(EntityBase *entity, APIConnect
 bool APIConnection::send_climate_state(climate::Climate *climate) {
   return this->send_message_smart_(climate, ClimateStateResponse::MESSAGE_TYPE, ClimateStateResponse::ESTIMATED_SIZE);
 }
-uint16_t APIConnection::try_send_climate_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+uint16_t APIConnection::try_send_climate_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size) {
-                                               bool is_single) {
   auto *climate = static_cast<climate::Climate *>(entity);
   ClimateStateResponse resp;
   auto traits = climate->get_traits();
@@ -687,11 +663,9 @@ uint16_t APIConnection::try_send_climate_state(EntityBase *entity, APIConnection
     resp.current_humidity = climate->current_humidity;
   if (traits.has_feature_flags(climate::CLIMATE_SUPPORTS_TARGET_HUMIDITY))
     resp.target_humidity = climate->target_humidity;
-  return fill_and_encode_entity_state(climate, resp, ClimateStateResponse::MESSAGE_TYPE, conn, remaining_size,
+  return fill_and_encode_entity_state(climate, resp, ClimateStateResponse::MESSAGE_TYPE, conn, remaining_size);
-                                      is_single);
 }
-uint16_t APIConnection::try_send_climate_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+uint16_t APIConnection::try_send_climate_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size) {
-                                              bool is_single) {
   auto *climate = static_cast<climate::Climate *>(entity);
   ListEntitiesClimateResponse msg;
   auto traits = climate->get_traits();
@@ -716,8 +690,7 @@ uint16_t APIConnection::try_send_climate_info(EntityBase *entity, APIConnection
   msg.supported_presets = &traits.get_supported_presets();
   msg.supported_custom_presets = &traits.get_supported_custom_presets();
   msg.supported_swing_modes = &traits.get_supported_swing_modes();
-  return fill_and_encode_entity_info(climate, msg, ListEntitiesClimateResponse::MESSAGE_TYPE, conn, remaining_size,
+  return fill_and_encode_entity_info(climate, msg, ListEntitiesClimateResponse::MESSAGE_TYPE, conn, remaining_size);
-                                     is_single);
 }
 void APIConnection::climate_command(const ClimateCommandRequest &msg) {
   ENTITY_COMMAND_MAKE_CALL(climate::Climate, climate, climate)
@@ -750,17 +723,15 @@ bool APIConnection::send_number_state(number::Number *number) {
   return this->send_message_smart_(number, NumberStateResponse::MESSAGE_TYPE, NumberStateResponse::ESTIMATED_SIZE);
 }
 
-uint16_t APIConnection::try_send_number_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+uint16_t APIConnection::try_send_number_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size) {
-                                              bool is_single) {
   auto *number = static_cast<number::Number *>(entity);
   NumberStateResponse resp;
   resp.state = number->state;
   resp.missing_state = !number->has_state();
-  return fill_and_encode_entity_state(number, resp, NumberStateResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
+  return fill_and_encode_entity_state(number, resp, NumberStateResponse::MESSAGE_TYPE, conn, remaining_size);
 }
 
-uint16_t APIConnection::try_send_number_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+uint16_t APIConnection::try_send_number_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size) {
-                                             bool is_single) {
   auto *number = static_cast<number::Number *>(entity);
   ListEntitiesNumberResponse msg;
   msg.unit_of_measurement = number->traits.get_unit_of_measurement_ref();
@@ -769,8 +740,7 @@ uint16_t APIConnection::try_send_number_info(EntityBase *entity, APIConnection *
   msg.min_value = number->traits.get_min_value();
   msg.max_value = number->traits.get_max_value();
   msg.step = number->traits.get_step();
-  return fill_and_encode_entity_info(number, msg, ListEntitiesNumberResponse::MESSAGE_TYPE, conn, remaining_size,
+  return fill_and_encode_entity_info(number, msg, ListEntitiesNumberResponse::MESSAGE_TYPE, conn, remaining_size);
-                                     is_single);
 }
 void APIConnection::number_command(const NumberCommandRequest &msg) {
   ENTITY_COMMAND_MAKE_CALL(number::Number, number, number)
@@ -783,22 +753,19 @@ void APIConnection::number_command(const NumberCommandRequest &msg) {
 bool APIConnection::send_date_state(datetime::DateEntity *date) {
   return this->send_message_smart_(date, DateStateResponse::MESSAGE_TYPE, DateStateResponse::ESTIMATED_SIZE);
 }
-uint16_t APIConnection::try_send_date_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+uint16_t APIConnection::try_send_date_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size) {
-                                            bool is_single) {
   auto *date = static_cast<datetime::DateEntity *>(entity);
   DateStateResponse resp;
   resp.missing_state = !date->has_state();
   resp.year = date->year;
   resp.month = date->month;
   resp.day = date->day;
-  return fill_and_encode_entity_state(date, resp, DateStateResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
+  return fill_and_encode_entity_state(date, resp, DateStateResponse::MESSAGE_TYPE, conn, remaining_size);
 }
-uint16_t APIConnection::try_send_date_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+uint16_t APIConnection::try_send_date_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size) {
-                                           bool is_single) {
   auto *date = static_cast<datetime::DateEntity *>(entity);
   ListEntitiesDateResponse msg;
-  return fill_and_encode_entity_info(date, msg, ListEntitiesDateResponse::MESSAGE_TYPE, conn, remaining_size,
+  return fill_and_encode_entity_info(date, msg, ListEntitiesDateResponse::MESSAGE_TYPE, conn, remaining_size);
-                                     is_single);
 }
 void APIConnection::date_command(const DateCommandRequest &msg) {
   ENTITY_COMMAND_MAKE_CALL(datetime::DateEntity, date, date)
@@ -811,22 +778,19 @@ void APIConnection::date_command(const DateCommandRequest &msg) {
 bool APIConnection::send_time_state(datetime::TimeEntity *time) {
   return this->send_message_smart_(time, TimeStateResponse::MESSAGE_TYPE, TimeStateResponse::ESTIMATED_SIZE);
 }
-uint16_t APIConnection::try_send_time_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+uint16_t APIConnection::try_send_time_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size) {
-                                            bool is_single) {
   auto *time = static_cast<datetime::TimeEntity *>(entity);
   TimeStateResponse resp;
   resp.missing_state = !time->has_state();
   resp.hour = time->hour;
   resp.minute = time->minute;
   resp.second = time->second;
-  return fill_and_encode_entity_state(time, resp, TimeStateResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
+  return fill_and_encode_entity_state(time, resp, TimeStateResponse::MESSAGE_TYPE, conn, remaining_size);
 }
-uint16_t APIConnection::try_send_time_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+uint16_t APIConnection::try_send_time_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size) {
-                                           bool is_single) {
   auto *time = static_cast<datetime::TimeEntity *>(entity);
   ListEntitiesTimeResponse msg;
-  return fill_and_encode_entity_info(time, msg, ListEntitiesTimeResponse::MESSAGE_TYPE, conn, remaining_size,
+  return fill_and_encode_entity_info(time, msg, ListEntitiesTimeResponse::MESSAGE_TYPE, conn, remaining_size);
-                                     is_single);
 }
 void APIConnection::time_command(const TimeCommandRequest &msg) {
   ENTITY_COMMAND_MAKE_CALL(datetime::TimeEntity, time, time)
@@ -840,8 +804,7 @@ bool APIConnection::send_datetime_state(datetime::DateTimeEntity *datetime) {
   return this->send_message_smart_(datetime, DateTimeStateResponse::MESSAGE_TYPE,
                                    DateTimeStateResponse::ESTIMATED_SIZE);
 }
-uint16_t APIConnection::try_send_datetime_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+uint16_t APIConnection::try_send_datetime_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size) {
-                                                bool is_single) {
   auto *datetime = static_cast<datetime::DateTimeEntity *>(entity);
   DateTimeStateResponse resp;
   resp.missing_state = !datetime->has_state();
@@ -849,15 +812,12 @@ uint16_t APIConnection::try_send_datetime_state(EntityBase *entity, APIConnectio
     ESPTime state = datetime->state_as_esptime();
     resp.epoch_seconds = state.timestamp;
   }
-  return fill_and_encode_entity_state(datetime, resp, DateTimeStateResponse::MESSAGE_TYPE, conn, remaining_size,
+  return fill_and_encode_entity_state(datetime, resp, DateTimeStateResponse::MESSAGE_TYPE, conn, remaining_size);
-                                      is_single);
 }
-uint16_t APIConnection::try_send_datetime_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+uint16_t APIConnection::try_send_datetime_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size) {
-                                               bool is_single) {
   auto *datetime = static_cast<datetime::DateTimeEntity *>(entity);
   ListEntitiesDateTimeResponse msg;
-  return fill_and_encode_entity_info(datetime, msg, ListEntitiesDateTimeResponse::MESSAGE_TYPE, conn, remaining_size,
+  return fill_and_encode_entity_info(datetime, msg, ListEntitiesDateTimeResponse::MESSAGE_TYPE, conn, remaining_size);
-                                     is_single);
 }
 void APIConnection::datetime_command(const DateTimeCommandRequest &msg) {
   ENTITY_COMMAND_MAKE_CALL(datetime::DateTimeEntity, datetime, datetime)
@@ -871,25 +831,22 @@ bool APIConnection::send_text_state(text::Text *text) {
   return this->send_message_smart_(text, TextStateResponse::MESSAGE_TYPE, TextStateResponse::ESTIMATED_SIZE);
 }
 
-uint16_t APIConnection::try_send_text_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+uint16_t APIConnection::try_send_text_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size) {
-                                            bool is_single) {
   auto *text = static_cast<text::Text *>(entity);
   TextStateResponse resp;
   resp.state = StringRef(text->state);
   resp.missing_state = !text->has_state();
-  return fill_and_encode_entity_state(text, resp, TextStateResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
+  return fill_and_encode_entity_state(text, resp, TextStateResponse::MESSAGE_TYPE, conn, remaining_size);
 }
 
-uint16_t APIConnection::try_send_text_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+uint16_t APIConnection::try_send_text_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size) {
-                                           bool is_single) {
   auto *text = static_cast<text::Text *>(entity);
   ListEntitiesTextResponse msg;
   msg.mode = static_cast<enums::TextMode>(text->traits.get_mode());
   msg.min_length = text->traits.get_min_length();
   msg.max_length = text->traits.get_max_length();
   msg.pattern = text->traits.get_pattern_ref();
-  return fill_and_encode_entity_info(text, msg, ListEntitiesTextResponse::MESSAGE_TYPE, conn, remaining_size,
+  return fill_and_encode_entity_info(text, msg, ListEntitiesTextResponse::MESSAGE_TYPE, conn, remaining_size);
-                                     is_single);
 }
 void APIConnection::text_command(const TextCommandRequest &msg) {
   ENTITY_COMMAND_MAKE_CALL(text::Text, text, text)
@@ -903,22 +860,19 @@ bool APIConnection::send_select_state(select::Select *select) {
   return this->send_message_smart_(select, SelectStateResponse::MESSAGE_TYPE, SelectStateResponse::ESTIMATED_SIZE);
 }
 
-uint16_t APIConnection::try_send_select_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+uint16_t APIConnection::try_send_select_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size) {
-                                              bool is_single) {
   auto *select = static_cast<select::Select *>(entity);
   SelectStateResponse resp;
   resp.state = select->current_option();
   resp.missing_state = !select->has_state();
-  return fill_and_encode_entity_state(select, resp, SelectStateResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
+  return fill_and_encode_entity_state(select, resp, SelectStateResponse::MESSAGE_TYPE, conn, remaining_size);
 }
 
-uint16_t APIConnection::try_send_select_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+uint16_t APIConnection::try_send_select_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size) {
-                                             bool is_single) {
   auto *select = static_cast<select::Select *>(entity);
   ListEntitiesSelectResponse msg;
   msg.options = &select->traits.get_options();
-  return fill_and_encode_entity_info(select, msg, ListEntitiesSelectResponse::MESSAGE_TYPE, conn, remaining_size,
+  return fill_and_encode_entity_info(select, msg, ListEntitiesSelectResponse::MESSAGE_TYPE, conn, remaining_size);
-                                     is_single);
 }
 void APIConnection::select_command(const SelectCommandRequest &msg) {
   ENTITY_COMMAND_MAKE_CALL(select::Select, select, select)
@@ -928,13 +882,11 @@ void APIConnection::select_command(const SelectCommandRequest &msg) {
 #endif
 
 #ifdef USE_BUTTON
-uint16_t APIConnection::try_send_button_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+uint16_t APIConnection::try_send_button_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size) {
-                                             bool is_single) {
   auto *button = static_cast<button::Button *>(entity);
   ListEntitiesButtonResponse msg;
   msg.device_class = button->get_device_class_ref();
-  return fill_and_encode_entity_info(button, msg, ListEntitiesButtonResponse::MESSAGE_TYPE, conn, remaining_size,
+  return fill_and_encode_entity_info(button, msg, ListEntitiesButtonResponse::MESSAGE_TYPE, conn, remaining_size);
-                                     is_single);
 }
 void esphome::api::APIConnection::button_command(const ButtonCommandRequest &msg) {
   ENTITY_COMMAND_GET(button::Button, button, button)
@@ -947,23 +899,20 @@ bool APIConnection::send_lock_state(lock::Lock *a_lock) {
   return this->send_message_smart_(a_lock, LockStateResponse::MESSAGE_TYPE, LockStateResponse::ESTIMATED_SIZE);
 }
 
-uint16_t APIConnection::try_send_lock_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+uint16_t APIConnection::try_send_lock_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size) {
-                                            bool is_single) {
   auto *a_lock = static_cast<lock::Lock *>(entity);
   LockStateResponse resp;
   resp.state = static_cast<enums::LockState>(a_lock->state);
-  return fill_and_encode_entity_state(a_lock, resp, LockStateResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
+  return fill_and_encode_entity_state(a_lock, resp, LockStateResponse::MESSAGE_TYPE, conn, remaining_size);
 }
 
-uint16_t APIConnection::try_send_lock_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+uint16_t APIConnection::try_send_lock_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size) {
-                                           bool is_single) {
   auto *a_lock = static_cast<lock::Lock *>(entity);
   ListEntitiesLockResponse msg;
   msg.assumed_state = a_lock->traits.get_assumed_state();
   msg.supports_open = a_lock->traits.get_supports_open();
   msg.requires_code = a_lock->traits.get_requires_code();
-  return fill_and_encode_entity_info(a_lock, msg, ListEntitiesLockResponse::MESSAGE_TYPE, conn, remaining_size,
+  return fill_and_encode_entity_info(a_lock, msg, ListEntitiesLockResponse::MESSAGE_TYPE, conn, remaining_size);
-                                     is_single);
 }
 void APIConnection::lock_command(const LockCommandRequest &msg) {
   ENTITY_COMMAND_GET(lock::Lock, a_lock, lock)
@@ -986,16 +935,14 @@ void APIConnection::lock_command(const LockCommandRequest &msg) {
 bool APIConnection::send_valve_state(valve::Valve *valve) {
   return this->send_message_smart_(valve, ValveStateResponse::MESSAGE_TYPE, ValveStateResponse::ESTIMATED_SIZE);
 }
-uint16_t APIConnection::try_send_valve_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+uint16_t APIConnection::try_send_valve_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size) {
-                                             bool is_single) {
   auto *valve = static_cast<valve::Valve *>(entity);
   ValveStateResponse resp;
   resp.position = valve->position;
   resp.current_operation = static_cast<enums::ValveOperation>(valve->current_operation);
-  return fill_and_encode_entity_state(valve, resp, ValveStateResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
+  return fill_and_encode_entity_state(valve, resp, ValveStateResponse::MESSAGE_TYPE, conn, remaining_size);
 }
-uint16_t APIConnection::try_send_valve_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+uint16_t APIConnection::try_send_valve_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size) {
-                                            bool is_single) {
   auto *valve = static_cast<valve::Valve *>(entity);
   ListEntitiesValveResponse msg;
   auto traits = valve->get_traits();
@@ -1003,8 +950,7 @@ uint16_t APIConnection::try_send_valve_info(EntityBase *entity, APIConnection *c
   msg.assumed_state = traits.get_is_assumed_state();
   msg.supports_position = traits.get_supports_position();
   msg.supports_stop = traits.get_supports_stop();
-  return fill_and_encode_entity_info(valve, msg, ListEntitiesValveResponse::MESSAGE_TYPE, conn, remaining_size,
+  return fill_and_encode_entity_info(valve, msg, ListEntitiesValveResponse::MESSAGE_TYPE, conn, remaining_size);
-                                     is_single);
 }
 void APIConnection::valve_command(const ValveCommandRequest &msg) {
   ENTITY_COMMAND_MAKE_CALL(valve::Valve, valve, valve)
@@ -1021,8 +967,7 @@ bool APIConnection::send_media_player_state(media_player::MediaPlayer *media_pla
   return this->send_message_smart_(media_player, MediaPlayerStateResponse::MESSAGE_TYPE,
                                    MediaPlayerStateResponse::ESTIMATED_SIZE);
 }
-uint16_t APIConnection::try_send_media_player_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+uint16_t APIConnection::try_send_media_player_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size) {
-                                                    bool is_single) {
   auto *media_player = static_cast<media_player::MediaPlayer *>(entity);
   MediaPlayerStateResponse resp;
   media_player::MediaPlayerState report_state = media_player->state == media_player::MEDIA_PLAYER_STATE_ANNOUNCING
@@ -1031,11 +976,9 @@ uint16_t APIConnection::try_send_media_player_state(EntityBase *entity, APIConne
   resp.state = static_cast<enums::MediaPlayerState>(report_state);
   resp.volume = media_player->volume;
   resp.muted = media_player->is_muted();
-  return fill_and_encode_entity_state(media_player, resp, MediaPlayerStateResponse::MESSAGE_TYPE, conn, remaining_size,
+  return fill_and_encode_entity_state(media_player, resp, MediaPlayerStateResponse::MESSAGE_TYPE, conn, remaining_size);
-                                      is_single);
 }
-uint16_t APIConnection::try_send_media_player_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+uint16_t APIConnection::try_send_media_player_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size) {
-                                                   bool is_single) {
   auto *media_player = static_cast<media_player::MediaPlayer *>(entity);
   ListEntitiesMediaPlayerResponse msg;
   auto traits = media_player->get_traits();
@@ -1051,7 +994,7 @@ uint16_t APIConnection::try_send_media_player_info(EntityBase *entity, APIConnec
     media_format.sample_bytes = supported_format.sample_bytes;
   }
   return fill_and_encode_entity_info(media_player, msg, ListEntitiesMediaPlayerResponse::MESSAGE_TYPE, conn,
-                                     remaining_size, is_single);
+                                     remaining_size);
 }
 void APIConnection::media_player_command(const MediaPlayerCommandRequest &msg) {
   ENTITY_COMMAND_MAKE_CALL(media_player::MediaPlayer, media_player, media_player)
@@ -1092,7 +1035,7 @@ void APIConnection::try_send_camera_image_() {
     msg.device_id = camera::Camera::instance()->get_device_id();
 #endif
 
-    if (!this->send_message_(msg, CameraImageResponse::MESSAGE_TYPE)) {
+    if (!this->send_message_impl(msg, CameraImageResponse::MESSAGE_TYPE)) {
       return;  // Send failed, try again later
     }
     this->image_reader_->consume_data(to_send);
@@ -1115,12 +1058,10 @@ void APIConnection::set_camera_state(std::shared_ptr<camera::CameraImage> image)
     this->try_send_camera_image_();
   }
 }
-uint16_t APIConnection::try_send_camera_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+uint16_t APIConnection::try_send_camera_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size) {
-                                             bool is_single) {
   auto *camera = static_cast<camera::Camera *>(entity);
   ListEntitiesCameraResponse msg;
-  return fill_and_encode_entity_info(camera, msg, ListEntitiesCameraResponse::MESSAGE_TYPE, conn, remaining_size,
+  return fill_and_encode_entity_info(camera, msg, ListEntitiesCameraResponse::MESSAGE_TYPE, conn, remaining_size);
-                                     is_single);
 }
 void APIConnection::camera_image(const CameraImageRequest &msg) {
   if (camera::Camera::instance() == nullptr)
@@ -1305,22 +1246,22 @@ bool APIConnection::send_alarm_control_panel_state(alarm_control_panel::AlarmCon
                                    AlarmControlPanelStateResponse::ESTIMATED_SIZE);
 }
 uint16_t APIConnection::try_send_alarm_control_panel_state(EntityBase *entity, APIConnection *conn,
-                                                           uint32_t remaining_size, bool is_single) {
+                                                           uint32_t remaining_size) {
   auto *a_alarm_control_panel = static_cast<alarm_control_panel::AlarmControlPanel *>(entity);
   AlarmControlPanelStateResponse resp;
   resp.state = static_cast<enums::AlarmControlPanelState>(a_alarm_control_panel->get_state());
   return fill_and_encode_entity_state(a_alarm_control_panel, resp, AlarmControlPanelStateResponse::MESSAGE_TYPE, conn,
-                                      remaining_size, is_single);
+                                      remaining_size);
 }
 uint16_t APIConnection::try_send_alarm_control_panel_info(EntityBase *entity, APIConnection *conn,
-                                                          uint32_t remaining_size, bool is_single) {
+                                                          uint32_t remaining_size) {
   auto *a_alarm_control_panel = static_cast<alarm_control_panel::AlarmControlPanel *>(entity);
   ListEntitiesAlarmControlPanelResponse msg;
   msg.supported_features = a_alarm_control_panel->get_supported_features();
   msg.requires_code = a_alarm_control_panel->get_requires_code();
   msg.requires_code_to_arm = a_alarm_control_panel->get_requires_code_to_arm();
   return fill_and_encode_entity_info(a_alarm_control_panel, msg, ListEntitiesAlarmControlPanelResponse::MESSAGE_TYPE,
-                                     conn, remaining_size, is_single);
+                                     conn, remaining_size);
 }
 void APIConnection::alarm_control_panel_command(const AlarmControlPanelCommandRequest &msg) {
   ENTITY_COMMAND_MAKE_CALL(alarm_control_panel::AlarmControlPanel, a_alarm_control_panel, alarm_control_panel)
@@ -1357,8 +1298,7 @@ bool APIConnection::send_water_heater_state(water_heater::WaterHeater *water_hea
   return this->send_message_smart_(water_heater, WaterHeaterStateResponse::MESSAGE_TYPE,
                                    WaterHeaterStateResponse::ESTIMATED_SIZE);
 }
-uint16_t APIConnection::try_send_water_heater_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+uint16_t APIConnection::try_send_water_heater_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size) {
-                                                    bool is_single) {
   auto *wh = static_cast<water_heater::WaterHeater *>(entity);
   WaterHeaterStateResponse resp;
   resp.mode = static_cast<enums::WaterHeaterMode>(wh->get_mode());
@@ -1369,10 +1309,9 @@ uint16_t APIConnection::try_send_water_heater_state(EntityBase *entity, APIConne
   resp.state = wh->get_state();
   resp.key = wh->get_object_id_hash();
 
-  return encode_message_to_buffer(resp, WaterHeaterStateResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
+  return encode_message_to_buffer(resp, WaterHeaterStateResponse::MESSAGE_TYPE, conn, remaining_size);
 }
-uint16_t APIConnection::try_send_water_heater_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+uint16_t APIConnection::try_send_water_heater_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size) {
-                                                   bool is_single) {
   auto *wh = static_cast<water_heater::WaterHeater *>(entity);
   ListEntitiesWaterHeaterResponse msg;
   auto traits = wh->get_traits();
@@ -1381,11 +1320,10 @@ uint16_t APIConnection::try_send_water_heater_info(EntityBase *entity, APIConnec
   msg.target_temperature_step = traits.get_target_temperature_step();
   msg.supported_modes = &traits.get_supported_modes();
   msg.supported_features = traits.get_feature_flags();
-  return fill_and_encode_entity_info(wh, msg, ListEntitiesWaterHeaterResponse::MESSAGE_TYPE, conn, remaining_size,
+  return fill_and_encode_entity_info(wh, msg, ListEntitiesWaterHeaterResponse::MESSAGE_TYPE, conn, remaining_size);
-                                     is_single);
 }
 
-void APIConnection::on_water_heater_command_request(const WaterHeaterCommandRequest &msg) {
+void APIConnection::water_heater_command(const WaterHeaterCommandRequest &msg) {
   ENTITY_COMMAND_MAKE_CALL(water_heater::WaterHeater, water_heater, water_heater)
   if (msg.has_fields & enums::WATER_HEATER_COMMAND_HAS_MODE)
     call.set_mode(static_cast<water_heater::WaterHeaterMode>(msg.mode));
@@ -1411,20 +1349,18 @@ void APIConnection::send_event(event::Event *event) {
                             event->get_last_event_type_index());
 }
 uint16_t APIConnection::try_send_event_response(event::Event *event, StringRef event_type, APIConnection *conn,
-                                                uint32_t remaining_size, bool is_single) {
+                                                uint32_t remaining_size) {
   EventResponse resp;
   resp.event_type = event_type;
-  return fill_and_encode_entity_state(event, resp, EventResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
+  return fill_and_encode_entity_state(event, resp, EventResponse::MESSAGE_TYPE, conn, remaining_size);
 }
 
-uint16_t APIConnection::try_send_event_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+uint16_t APIConnection::try_send_event_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size) {
-                                            bool is_single) {
   auto *event = static_cast<event::Event *>(entity);
   ListEntitiesEventResponse msg;
   msg.device_class = event->get_device_class_ref();
   msg.event_types = &event->get_event_types();
-  return fill_and_encode_entity_info(event, msg, ListEntitiesEventResponse::MESSAGE_TYPE, conn, remaining_size,
+  return fill_and_encode_entity_info(event, msg, ListEntitiesEventResponse::MESSAGE_TYPE, conn, remaining_size);
-                                     is_single);
 }
 #endif
 
@@ -1447,13 +1383,11 @@ void APIConnection::send_infrared_rf_receive_event(const InfraredRFReceiveEvent
 #endif
 
 #ifdef USE_INFRARED
-uint16_t APIConnection::try_send_infrared_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+uint16_t APIConnection::try_send_infrared_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size) {
-                                               bool is_single) {
   auto *infrared = static_cast<infrared::Infrared *>(entity);
   ListEntitiesInfraredResponse msg;
   msg.capabilities = infrared->get_capability_flags();
-  return fill_and_encode_entity_info(infrared, msg, ListEntitiesInfraredResponse::MESSAGE_TYPE, conn, remaining_size,
+  return fill_and_encode_entity_info(infrared, msg, ListEntitiesInfraredResponse::MESSAGE_TYPE, conn, remaining_size);
-                                     is_single);
 }
 #endif
 
@@ -1461,8 +1395,7 @@ uint16_t APIConnection::try_send_infrared_info(EntityBase *entity, APIConnection
 bool APIConnection::send_update_state(update::UpdateEntity *update) {
   return this->send_message_smart_(update, UpdateStateResponse::MESSAGE_TYPE, UpdateStateResponse::ESTIMATED_SIZE);
 }
-uint16_t APIConnection::try_send_update_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+uint16_t APIConnection::try_send_update_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size) {
-                                              bool is_single) {
   auto *update = static_cast<update::UpdateEntity *>(entity);
   UpdateStateResponse resp;
   resp.missing_state = !update->has_state();
@@ -1478,15 +1411,13 @@ uint16_t APIConnection::try_send_update_state(EntityBase *entity, APIConnection
     resp.release_summary = StringRef(update->update_info.summary);
     resp.release_url = StringRef(update->update_info.release_url);
   }
-  return fill_and_encode_entity_state(update, resp, UpdateStateResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
+  return fill_and_encode_entity_state(update, resp, UpdateStateResponse::MESSAGE_TYPE, conn, remaining_size);
 }
-uint16_t APIConnection::try_send_update_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+uint16_t APIConnection::try_send_update_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size) {
-                                             bool is_single) {
   auto *update = static_cast<update::UpdateEntity *>(entity);
   ListEntitiesUpdateResponse msg;
   msg.device_class = update->get_device_class_ref();
-  return fill_and_encode_entity_info(update, msg, ListEntitiesUpdateResponse::MESSAGE_TYPE, conn, remaining_size,
+  return fill_and_encode_entity_info(update, msg, ListEntitiesUpdateResponse::MESSAGE_TYPE, conn, remaining_size);
-                                     is_single);
 }
 void APIConnection::update_command(const UpdateCommandRequest &msg) {
   ENTITY_COMMAND_GET(update::UpdateEntity, update, update)
@@ -1512,7 +1443,7 @@ bool APIConnection::try_send_log_message(int level, const char *tag, const char
   SubscribeLogsResponse msg;
   msg.level = static_cast<enums::LogLevel>(level);
   msg.set_message(reinterpret_cast<const uint8_t *>(line), message_len);
-  return this->send_message_(msg, SubscribeLogsResponse::MESSAGE_TYPE);
+  return this->send_message_impl(msg, SubscribeLogsResponse::MESSAGE_TYPE);
 }
 
 void APIConnection::complete_authentication_() {
@@ -1837,6 +1768,14 @@ bool APIConnection::try_to_clear_buffer(bool log_out_of_space) {
   }
   return false;
 }
+bool APIConnection::send_message_impl(const ProtoMessage &msg, uint8_t message_type) {
+  ProtoSize size;
+  msg.calculate_size(size);
+  std::vector<uint8_t> &shared_buf = this->parent_->get_shared_buffer_ref();
+  this->prepare_first_message_buffer(shared_buf, size.get_size());
+  msg.encode({&shared_buf});
+  return this->send_buffer({&shared_buf}, message_type);
+}
 bool APIConnection::send_buffer(ProtoWriteBuffer buffer, uint8_t message_type) {
   const bool is_log_message = (message_type == SubscribeLogsResponse::MESSAGE_TYPE);
 
@@ -1897,6 +1836,23 @@ void APIConnection::DeferredBatch::add_item_front(EntityBase *entity, uint8_t me
   }
 }
 
+bool APIConnection::send_message_smart_(EntityBase *entity, uint8_t message_type, uint8_t estimated_size,
+                                        uint8_t aux_data_index) {
+  if (this->should_send_immediately_(message_type) && this->helper_->can_write_without_blocking()) {
+    auto &shared_buf = this->parent_->get_shared_buffer_ref();
+    this->prepare_first_message_buffer(shared_buf, estimated_size);
+    DeferredBatch::BatchItem item{entity, message_type, estimated_size, aux_data_index};
+    if (this->dispatch_message_(item, MAX_BATCH_PACKET_SIZE, true) &&
+        this->send_buffer(ProtoWriteBuffer{&shared_buf}, message_type)) {
+#ifdef HAS_PROTO_MESSAGE_DUMP
+      this->log_batch_item_(item);
+#endif
+      return true;
+    }
+  }
+  return this->schedule_message_(entity, message_type, estimated_size, aux_data_index);
+}
+
 bool APIConnection::schedule_batch_() {
   if (!this->flags_.batch_scheduled) {
     this->flags_.batch_scheduled = true;
@@ -1925,10 +1881,21 @@ void APIConnection::process_batch_() {
   auto &shared_buf = this->parent_->get_shared_buffer_ref();
   size_t num_items = this->deferred_batch_.size();
 
-  // Fast path for single message - allocate exact size needed
+  // Cache these values to avoid repeated virtual calls
+  const uint8_t header_padding = this->helper_->frame_header_padding();
+  const uint8_t footer_size = this->helper_->frame_footer_size();
+
+  // Pre-calculate exact buffer size needed based on message types
+  uint32_t total_estimated_size = num_items * (header_padding + footer_size);
+  for (size_t i = 0; i < num_items; i++) {
+    total_estimated_size += this->deferred_batch_[i].estimated_size;
+  }
+
+  this->prepare_first_message_buffer(shared_buf, header_padding, total_estimated_size);
+
+  // Fast path for single message - buffer already allocated above
   if (num_items == 1) {
     const auto &item = this->deferred_batch_[0];
-
     // Let dispatch_message_ calculate size and encode if it fits
     uint16_t payload_size = this->dispatch_message_(item, std::numeric_limits<uint16_t>::max(), true);
 
@@ -1951,30 +1918,8 @@ void APIConnection::process_batch_() {
   // Stack-allocated array for message info
   alignas(MessageInfo) char message_info_storage[MAX_MESSAGES_PER_BATCH * sizeof(MessageInfo)];
   MessageInfo *message_info = reinterpret_cast<MessageInfo *>(message_info_storage);
-  size_t message_count = 0;
-
-  // Cache these values to avoid repeated virtual calls
-  const uint8_t header_padding = this->helper_->frame_header_padding();
-  const uint8_t footer_size = this->helper_->frame_footer_size();
-
-  // Initialize buffer and tracking variables
-  shared_buf.clear();
-
-  // Pre-calculate exact buffer size needed based on message types
-  uint32_t total_estimated_size = num_items * (header_padding + footer_size);
-  for (size_t i = 0; i < this->deferred_batch_.size(); i++) {
-    const auto &item = this->deferred_batch_[i];
-    total_estimated_size += item.estimated_size;
-  }
-
-  // Calculate total overhead for all messages
-  // Reserve based on estimated size (much more accurate than 24-byte worst-case)
-  shared_buf.reserve(total_estimated_size);
-  this->flags_.batch_first_message = true;
-
   size_t items_processed = 0;
   uint16_t remaining_size = std::numeric_limits<uint16_t>::max();
-
   // Track where each message's header padding begins in the buffer
   // For plaintext: this is where the 6-byte header padding starts
   // For noise: this is where the 7-byte header padding starts
@@ -1986,7 +1931,7 @@ void APIConnection::process_batch_() {
     const auto &item = this->deferred_batch_[i];
     // Try to encode message via dispatch
     // The dispatch function calculates overhead to determine if the message fits
-    uint16_t payload_size = this->dispatch_message_(item, remaining_size, false);
+    uint16_t payload_size = this->dispatch_message_(item, remaining_size, i == 0);
 
     if (payload_size == 0) {
       // Message won't fit, stop processing
@@ -2000,10 +1945,7 @@ void APIConnection::process_batch_() {
     // This avoids default-constructing all MAX_MESSAGES_PER_BATCH elements
     // Explicit destruction is not needed because MessageInfo is trivially destructible,
     // as ensured by the static_assert in its definition.
-    new (&message_info[message_count++]) MessageInfo(item.message_type, current_offset, proto_payload_size);
+    new (&message_info[items_processed++]) MessageInfo(item.message_type, current_offset, proto_payload_size);
-
-    // Update tracking variables
-    items_processed++;
     // After first message, set remaining size to MAX_BATCH_PACKET_SIZE to avoid fragmentation
     if (items_processed == 1) {
       remaining_size = MAX_BATCH_PACKET_SIZE;
@@ -2026,7 +1968,7 @@ void APIConnection::process_batch_() {
 
   // Send all collected messages
   APIError err = this->helper_->write_protobuf_messages(ProtoWriteBuffer{&shared_buf},
-                                                        std::span<const MessageInfo>(message_info, message_count));
+                                                        std::span<const MessageInfo>(message_info, items_processed));
   if (err != APIError::OK && err != APIError::WOULD_BLOCK) {
     this->fatal_error_with_log_(LOG_STR("Batch write failed"), err);
   }
@@ -2055,7 +1997,8 @@ void APIConnection::process_batch_() {
 // Dispatch message encoding based on message_type
 // Switch assigns function pointer, single call site for smaller code size
 uint16_t APIConnection::dispatch_message_(const DeferredBatch::BatchItem &item, uint32_t remaining_size,
-                                          bool is_single) {
+                                          bool batch_first) {
+  this->flags_.batch_first_message = batch_first;
 #ifdef USE_EVENT
   // Events need aux_data_index to look up event type from entity
   if (item.message_type == EventResponse::MESSAGE_TYPE) {
@@ -2064,7 +2007,7 @@ uint16_t APIConnection::dispatch_message_(const DeferredBatch::BatchItem &item,
       return 0;
     auto *event = static_cast<event::Event *>(item.entity);
     return try_send_event_response(event, StringRef::from_maybe_nullptr(event->get_event_type(item.aux_data_index)),
-                                   this, remaining_size, is_single);
+                                   this, remaining_size);
   }
 #endif
 
@@ -2174,25 +2117,22 @@ uint16_t APIConnection::dispatch_message_(const DeferredBatch::BatchItem &item,
 #undef CASE_STATE_INFO
 #undef CASE_INFO_ONLY
 
-  return func(item.entity, this, remaining_size, is_single);
+  return func(item.entity, this, remaining_size);
 }
 
-uint16_t APIConnection::try_send_list_info_done(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+uint16_t APIConnection::try_send_list_info_done(EntityBase *entity, APIConnection *conn, uint32_t remaining_size) {
-                                                bool is_single) {
   ListEntitiesDoneResponse resp;
-  return encode_message_to_buffer(resp, ListEntitiesDoneResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
+  return encode_message_to_buffer(resp, ListEntitiesDoneResponse::MESSAGE_TYPE, conn, remaining_size);
 }
 
-uint16_t APIConnection::try_send_disconnect_request(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+uint16_t APIConnection::try_send_disconnect_request(EntityBase *entity, APIConnection *conn, uint32_t remaining_size) {
-                                                    bool is_single) {
   DisconnectRequest req;
-  return encode_message_to_buffer(req, DisconnectRequest::MESSAGE_TYPE, conn, remaining_size, is_single);
+  return encode_message_to_buffer(req, DisconnectRequest::MESSAGE_TYPE, conn, remaining_size);
 }
 
-uint16_t APIConnection::try_send_ping_request(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+uint16_t APIConnection::try_send_ping_request(EntityBase *entity, APIConnection *conn, uint32_t remaining_size) {
-                                              bool is_single) {
   PingRequest req;
-  return encode_message_to_buffer(req, PingRequest::MESSAGE_TYPE, conn, remaining_size, is_single);
+  return encode_message_to_buffer(req, PingRequest::MESSAGE_TYPE, conn, remaining_size);
 }
 
 #ifdef USE_API_HOMEASSISTANT_STATES

esphome/components/api/api_connection.h

@@ -170,7 +170,7 @@ class APIConnection final : public APIServerConnection {
 
 #ifdef USE_WATER_HEATER
   bool send_water_heater_state(water_heater::WaterHeater *water_heater);
-  void on_water_heater_command_request(const WaterHeaterCommandRequest &msg) override;
+  void water_heater_command(const WaterHeaterCommandRequest &msg) override;
 #endif
 
 #ifdef USE_IR_RF
@@ -255,17 +255,7 @@ class APIConnection final : public APIServerConnection {
 
   void on_fatal_error() override;
   void on_no_setup_connection() override;
-  ProtoWriteBuffer create_buffer(uint32_t reserve_size) override {
+  bool send_message_impl(const ProtoMessage &msg, uint8_t message_type) override;
-    // FIXME: ensure no recursive writes can happen
-
-    // Get header padding size - used for both reserve and insert
-    uint8_t header_padding = this->helper_->frame_header_padding();
-    // Get shared buffer from parent server
-    std::vector<uint8_t> &shared_buf = this->parent_->get_shared_buffer_ref();
-    this->prepare_first_message_buffer(shared_buf, header_padding,
-                                       reserve_size + header_padding + this->helper_->frame_footer_size());
-    return {&shared_buf};
-  }
 
   void prepare_first_message_buffer(std::vector<uint8_t> &shared_buf, size_t header_padding, size_t total_size) {
     shared_buf.clear();
@@ -277,6 +267,13 @@ class APIConnection final : public APIServerConnection {
     shared_buf.resize(header_padding);
   }
 
+  // Convenience overload - computes frame overhead internally
+  void prepare_first_message_buffer(std::vector<uint8_t> &shared_buf, size_t payload_size) {
+    const uint8_t header_padding = this->helper_->frame_header_padding();
+    const uint8_t footer_size = this->helper_->frame_footer_size();
+    this->prepare_first_message_buffer(shared_buf, header_padding, payload_size + header_padding + footer_size);
+  }
+
   bool try_to_clear_buffer(bool log_out_of_space);
   bool send_buffer(ProtoWriteBuffer buffer, uint8_t message_type) override;
 
@@ -298,21 +295,21 @@ class APIConnection final : public APIServerConnection {
 
   // Non-template helper to encode any ProtoMessage
   static uint16_t encode_message_to_buffer(ProtoMessage &msg, uint8_t message_type, APIConnection *conn,
-                                           uint32_t remaining_size, bool is_single);
+                                           uint32_t remaining_size);
 
   // Helper to fill entity state base and encode message
   static uint16_t fill_and_encode_entity_state(EntityBase *entity, StateResponseProtoMessage &msg, uint8_t message_type,
-                                               APIConnection *conn, uint32_t remaining_size, bool is_single) {
+                                               APIConnection *conn, uint32_t remaining_size) {
     msg.key = entity->get_object_id_hash();
 #ifdef USE_DEVICES
     msg.device_id = entity->get_device_id();
 #endif
-    return encode_message_to_buffer(msg, message_type, conn, remaining_size, is_single);
+    return encode_message_to_buffer(msg, message_type, conn, remaining_size);
   }
 
   // Helper to fill entity info base and encode message
   static uint16_t fill_and_encode_entity_info(EntityBase *entity, InfoResponseProtoMessage &msg, uint8_t message_type,
-                                              APIConnection *conn, uint32_t remaining_size, bool is_single) {
+                                              APIConnection *conn, uint32_t remaining_size) {
     // Set common fields that are shared by all entity types
     msg.key = entity->get_object_id_hash();
 
@@ -339,7 +336,7 @@ class APIConnection final : public APIServerConnection {
 #ifdef USE_DEVICES
     msg.device_id = entity->get_device_id();
 #endif
-    return encode_message_to_buffer(msg, message_type, conn, remaining_size, is_single);
+    return encode_message_to_buffer(msg, message_type, conn, remaining_size);
   }
 
 #ifdef USE_VOICE_ASSISTANT
@@ -370,141 +367,108 @@ class APIConnection final : public APIServerConnection {
   }
 
 #ifdef USE_BINARY_SENSOR
-  static uint16_t try_send_binary_sensor_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+  static uint16_t try_send_binary_sensor_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size);
-                                               bool is_single);
+  static uint16_t try_send_binary_sensor_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size);
-  static uint16_t try_send_binary_sensor_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
-                                              bool is_single);
 #endif
 #ifdef USE_COVER
-  static uint16_t try_send_cover_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+  static uint16_t try_send_cover_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size);
-                                       bool is_single);
+  static uint16_t try_send_cover_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size);
-  static uint16_t try_send_cover_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size, bool is_single);
 #endif
 #ifdef USE_FAN
-  static uint16_t try_send_fan_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size, bool is_single);
+  static uint16_t try_send_fan_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size);
-  static uint16_t try_send_fan_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size, bool is_single);
+  static uint16_t try_send_fan_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size);
 #endif
 #ifdef USE_LIGHT
-  static uint16_t try_send_light_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+  static uint16_t try_send_light_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size);
-                                       bool is_single);
+  static uint16_t try_send_light_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size);
-  static uint16_t try_send_light_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size, bool is_single);
 #endif
 #ifdef USE_SENSOR
-  static uint16_t try_send_sensor_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+  static uint16_t try_send_sensor_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size);
-                                        bool is_single);
+  static uint16_t try_send_sensor_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size);
-  static uint16_t try_send_sensor_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
-                                       bool is_single);
 #endif
 #ifdef USE_SWITCH
-  static uint16_t try_send_switch_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+  static uint16_t try_send_switch_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size);
-                                        bool is_single);
+  static uint16_t try_send_switch_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size);
-  static uint16_t try_send_switch_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
-                                       bool is_single);
 #endif
 #ifdef USE_TEXT_SENSOR
-  static uint16_t try_send_text_sensor_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+  static uint16_t try_send_text_sensor_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size);
-                                             bool is_single);
+  static uint16_t try_send_text_sensor_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size);
-  static uint16_t try_send_text_sensor_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
-                                            bool is_single);
 #endif
 #ifdef USE_CLIMATE
-  static uint16_t try_send_climate_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+  static uint16_t try_send_climate_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size);
-                                         bool is_single);
+  static uint16_t try_send_climate_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size);
-  static uint16_t try_send_climate_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
-                                        bool is_single);
 #endif
 #ifdef USE_NUMBER
-  static uint16_t try_send_number_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+  static uint16_t try_send_number_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size);
-                                        bool is_single);
+  static uint16_t try_send_number_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size);
-  static uint16_t try_send_number_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
-                                       bool is_single);
 #endif
 #ifdef USE_DATETIME_DATE
-  static uint16_t try_send_date_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size, bool is_single);
+  static uint16_t try_send_date_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size);
-  static uint16_t try_send_date_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size, bool is_single);
+  static uint16_t try_send_date_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size);
 #endif
 #ifdef USE_DATETIME_TIME
-  static uint16_t try_send_time_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size, bool is_single);
+  static uint16_t try_send_time_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size);
-  static uint16_t try_send_time_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size, bool is_single);
+  static uint16_t try_send_time_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size);
 #endif
 #ifdef USE_DATETIME_DATETIME
-  static uint16_t try_send_datetime_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+  static uint16_t try_send_datetime_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size);
-                                          bool is_single);
+  static uint16_t try_send_datetime_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size);
-  static uint16_t try_send_datetime_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
-                                         bool is_single);
 #endif
 #ifdef USE_TEXT
-  static uint16_t try_send_text_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size, bool is_single);
+  static uint16_t try_send_text_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size);
-  static uint16_t try_send_text_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size, bool is_single);
+  static uint16_t try_send_text_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size);
 #endif
 #ifdef USE_SELECT
-  static uint16_t try_send_select_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+  static uint16_t try_send_select_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size);
-                                        bool is_single);
+  static uint16_t try_send_select_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size);
-  static uint16_t try_send_select_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
-                                       bool is_single);
 #endif
 #ifdef USE_BUTTON
-  static uint16_t try_send_button_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+  static uint16_t try_send_button_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size);
-                                       bool is_single);
 #endif
 #ifdef USE_LOCK
-  static uint16_t try_send_lock_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size, bool is_single);
+  static uint16_t try_send_lock_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size);
-  static uint16_t try_send_lock_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size, bool is_single);
+  static uint16_t try_send_lock_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size);
 #endif
 #ifdef USE_VALVE
-  static uint16_t try_send_valve_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+  static uint16_t try_send_valve_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size);
-                                       bool is_single);
+  static uint16_t try_send_valve_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size);
-  static uint16_t try_send_valve_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size, bool is_single);
 #endif
 #ifdef USE_MEDIA_PLAYER
-  static uint16_t try_send_media_player_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+  static uint16_t try_send_media_player_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size);
-                                              bool is_single);
+  static uint16_t try_send_media_player_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size);
-  static uint16_t try_send_media_player_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
-                                             bool is_single);
 #endif
 #ifdef USE_ALARM_CONTROL_PANEL
-  static uint16_t try_send_alarm_control_panel_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+  static uint16_t try_send_alarm_control_panel_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size);
-                                                     bool is_single);
+  static uint16_t try_send_alarm_control_panel_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size);
-  static uint16_t try_send_alarm_control_panel_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
-                                                    bool is_single);
 #endif
 #ifdef USE_WATER_HEATER
-  static uint16_t try_send_water_heater_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+  static uint16_t try_send_water_heater_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size);
-                                              bool is_single);
+  static uint16_t try_send_water_heater_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size);
-  static uint16_t try_send_water_heater_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
-                                             bool is_single);
 #endif
 #ifdef USE_INFRARED
-  static uint16_t try_send_infrared_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+  static uint16_t try_send_infrared_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size);
-                                         bool is_single);
 #endif
 #ifdef USE_EVENT
   static uint16_t try_send_event_response(event::Event *event, StringRef event_type, APIConnection *conn,
-                                          uint32_t remaining_size, bool is_single);
+                                          uint32_t remaining_size);
-  static uint16_t try_send_event_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size, bool is_single);
+  static uint16_t try_send_event_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size);
 #endif
 #ifdef USE_UPDATE
-  static uint16_t try_send_update_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+  static uint16_t try_send_update_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size);
-                                        bool is_single);
+  static uint16_t try_send_update_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size);
-  static uint16_t try_send_update_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
-                                       bool is_single);
 #endif
 #ifdef USE_CAMERA
-  static uint16_t try_send_camera_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+  static uint16_t try_send_camera_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size);
-                                       bool is_single);
 #endif
 
   // Method for ListEntitiesDone batching
-  static uint16_t try_send_list_info_done(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+  static uint16_t try_send_list_info_done(EntityBase *entity, APIConnection *conn, uint32_t remaining_size);
-                                          bool is_single);
 
   // Method for DisconnectRequest batching
-  static uint16_t try_send_disconnect_request(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+  static uint16_t try_send_disconnect_request(EntityBase *entity, APIConnection *conn, uint32_t remaining_size);
-                                              bool is_single);
 
   // Batch message method for ping requests
-  static uint16_t try_send_ping_request(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+  static uint16_t try_send_ping_request(EntityBase *entity, APIConnection *conn, uint32_t remaining_size);
-                                        bool is_single);
 
   // === Optimal member ordering for 32-bit systems ===
 
@@ -539,7 +503,7 @@ class APIConnection final : public APIServerConnection {
 #endif
 
   // Function pointer type for message encoding
-  using MessageCreatorPtr = uint16_t (*)(EntityBase *, APIConnection *, uint32_t remaining_size, bool is_single);
+  using MessageCreatorPtr = uint16_t (*)(EntityBase *, APIConnection *, uint32_t remaining_size);
 
   // Generic batching mechanism for both state updates and entity info
   struct DeferredBatch {
@@ -652,7 +616,7 @@ class APIConnection final : public APIServerConnection {
 
   // Dispatch message encoding based on message_type - replaces function pointer storage
   // Switch assigns pointer, single call site for smaller code size
-  uint16_t dispatch_message_(const DeferredBatch::BatchItem &item, uint32_t remaining_size, bool is_single);
+  uint16_t dispatch_message_(const DeferredBatch::BatchItem &item, uint32_t remaining_size, bool batch_first);
 
 #ifdef HAS_PROTO_MESSAGE_DUMP
   void log_batch_item_(const DeferredBatch::BatchItem &item) {
@@ -684,19 +648,7 @@ class APIConnection final : public APIServerConnection {
   // Tries immediate send if should_send_immediately_() returns true and buffer has space
   // Falls back to batching if immediate send fails or isn't applicable
   bool send_message_smart_(EntityBase *entity, uint8_t message_type, uint8_t estimated_size,
-                           uint8_t aux_data_index = DeferredBatch::AUX_DATA_UNUSED) {
+                           uint8_t aux_data_index = DeferredBatch::AUX_DATA_UNUSED);
-    if (this->should_send_immediately_(message_type) && this->helper_->can_write_without_blocking()) {
-      DeferredBatch::BatchItem item{entity, message_type, estimated_size, aux_data_index};
-      if (this->dispatch_message_(item, MAX_BATCH_PACKET_SIZE, true) &&
-          this->send_buffer(ProtoWriteBuffer{&this->parent_->get_shared_buffer_ref()}, message_type)) {
-#ifdef HAS_PROTO_MESSAGE_DUMP
-        this->log_batch_item_(item);
-#endif
-        return true;
-      }
-    }
-    return this->schedule_message_(entity, message_type, estimated_size, aux_data_index);
-  }
 
   // Helper function to schedule a deferred message with known message type
   bool schedule_message_(EntityBase *entity, uint8_t message_type, uint8_t estimated_size,

esphome/components/api/api_pb2_dump.cpp

@@ -23,15 +23,8 @@ static inline void append_field_prefix(DumpBuffer &out, const char *field_name,
   out.append(indent, ' ').append(field_name).append(": ");
 }
 
-static inline void append_with_newline(DumpBuffer &out, const char *str) {
-  out.append(str);
-  out.append("\n");
-}
-
 static inline void append_uint(DumpBuffer &out, uint32_t value) {
-  char buf[16];
+  out.set_pos(buf_append_printf(out.data(), DumpBuffer::CAPACITY, out.pos(), "%" PRIu32, value));
-  snprintf(buf, sizeof(buf), "%" PRIu32, value);
-  out.append(buf);
 }
 
 // RAII helper for message dump formatting
@@ -49,31 +42,23 @@ class MessageDumpHelper {
 
 // Helper functions to reduce code duplication in dump methods
 static void dump_field(DumpBuffer &out, const char *field_name, int32_t value, int indent = 2) {
-  char buffer[64];
   append_field_prefix(out, field_name, indent);
-  snprintf(buffer, 64, "%" PRId32, value);
+  out.set_pos(buf_append_printf(out.data(), DumpBuffer::CAPACITY, out.pos(), "%" PRId32 "\n", value));
-  append_with_newline(out, buffer);
 }
 
 static void dump_field(DumpBuffer &out, const char *field_name, uint32_t value, int indent = 2) {
-  char buffer[64];
   append_field_prefix(out, field_name, indent);
-  snprintf(buffer, 64, "%" PRIu32, value);
+  out.set_pos(buf_append_printf(out.data(), DumpBuffer::CAPACITY, out.pos(), "%" PRIu32 "\n", value));
-  append_with_newline(out, buffer);
 }
 
 static void dump_field(DumpBuffer &out, const char *field_name, float value, int indent = 2) {
-  char buffer[64];
   append_field_prefix(out, field_name, indent);
-  snprintf(buffer, 64, "%g", value);
+  out.set_pos(buf_append_printf(out.data(), DumpBuffer::CAPACITY, out.pos(), "%g\n", value));
-  append_with_newline(out, buffer);
 }
 
 static void dump_field(DumpBuffer &out, const char *field_name, uint64_t value, int indent = 2) {
-  char buffer[64];
   append_field_prefix(out, field_name, indent);
-  snprintf(buffer, 64, "%" PRIu64, value);
+  out.set_pos(buf_append_printf(out.data(), DumpBuffer::CAPACITY, out.pos(), "%" PRIu64 "\n", value));
-  append_with_newline(out, buffer);
 }
 
 static void dump_field(DumpBuffer &out, const char *field_name, bool value, int indent = 2) {
@@ -112,7 +97,7 @@ static void dump_bytes_field(DumpBuffer &out, const char *field_name, const uint
   char hex_buf[format_hex_pretty_size(160)];
   append_field_prefix(out, field_name, indent);
   format_hex_pretty_to(hex_buf, data, len);
-  append_with_newline(out, hex_buf);
+  out.append(hex_buf).append("\n");
 }
 
 template<> const char *proto_enum_to_string<enums::EntityCategory>(enums::EntityCategory value) {

esphome/components/api/api_pb2_service.cpp

@@ -746,6 +746,11 @@ void APIServerConnection::on_update_command_request(const UpdateCommandRequest &
 #ifdef USE_VALVE
 void APIServerConnection::on_valve_command_request(const ValveCommandRequest &msg) { this->valve_command(msg); }
 #endif
+#ifdef USE_WATER_HEATER
+void APIServerConnection::on_water_heater_command_request(const WaterHeaterCommandRequest &msg) {
+  this->water_heater_command(msg);
+}
+#endif
 #ifdef USE_BLUETOOTH_PROXY
 void APIServerConnection::on_subscribe_bluetooth_le_advertisements_request(
     const SubscribeBluetoothLEAdvertisementsRequest &msg) {

esphome/components/api/api_pb2_service.h

@@ -23,7 +23,7 @@ class APIServerConnectionBase : public ProtoService {
     DumpBuffer dump_buf;
     this->log_send_message_(msg.message_name(), msg.dump_to(dump_buf));
 #endif
-    return this->send_message_(msg, message_type);
+    return this->send_message_impl(msg, message_type);
   }
 
   virtual void on_hello_request(const HelloRequest &value){};
@@ -303,6 +303,9 @@ class APIServerConnection : public APIServerConnectionBase {
 #ifdef USE_VALVE
   virtual void valve_command(const ValveCommandRequest &msg) = 0;
 #endif
+#ifdef USE_WATER_HEATER
+  virtual void water_heater_command(const WaterHeaterCommandRequest &msg) = 0;
+#endif
 #ifdef USE_BLUETOOTH_PROXY
   virtual void subscribe_bluetooth_le_advertisements(const SubscribeBluetoothLEAdvertisementsRequest &msg) = 0;
 #endif
@@ -432,6 +435,9 @@ class APIServerConnection : public APIServerConnectionBase {
 #ifdef USE_VALVE
   void on_valve_command_request(const ValveCommandRequest &msg) override;
 #endif
+#ifdef USE_WATER_HEATER
+  void on_water_heater_command_request(const WaterHeaterCommandRequest &msg) override;
+#endif
 #ifdef USE_BLUETOOTH_PROXY
   void on_subscribe_bluetooth_le_advertisements_request(const SubscribeBluetoothLEAdvertisementsRequest &msg) override;
 #endif

esphome/components/api/api_server.cpp

@@ -211,7 +211,7 @@ void APIServer::loop() {
 
 #ifdef USE_API_CLIENT_DISCONNECTED_TRIGGER
     // Fire trigger after client is removed so api.connected reflects the true state
-    this->client_disconnected_trigger_->trigger(client_name, client_peername);
+    this->client_disconnected_trigger_.trigger(client_name, client_peername);
 #endif
     // Don't increment client_index since we need to process the swapped element
   }

esphome/components/api/api_server.h

@@ -227,12 +227,10 @@ class APIServer : public Component,
 #endif
 
 #ifdef USE_API_CLIENT_CONNECTED_TRIGGER
-  Trigger<std::string, std::string> *get_client_connected_trigger() const { return this->client_connected_trigger_; }
+  Trigger<std::string, std::string> *get_client_connected_trigger() { return &this->client_connected_trigger_; }
 #endif
 #ifdef USE_API_CLIENT_DISCONNECTED_TRIGGER
-  Trigger<std::string, std::string> *get_client_disconnected_trigger() const {
+  Trigger<std::string, std::string> *get_client_disconnected_trigger() { return &this->client_disconnected_trigger_; }
-    return this->client_disconnected_trigger_;
-  }
 #endif
 
  protected:
@@ -253,10 +251,10 @@ class APIServer : public Component,
   // Pointers and pointer-like types first (4 bytes each)
   std::unique_ptr<socket::Socket> socket_ = nullptr;
 #ifdef USE_API_CLIENT_CONNECTED_TRIGGER
-  Trigger<std::string, std::string> *client_connected_trigger_ = new Trigger<std::string, std::string>();
+  Trigger<std::string, std::string> client_connected_trigger_;
 #endif
 #ifdef USE_API_CLIENT_DISCONNECTED_TRIGGER
-  Trigger<std::string, std::string> *client_disconnected_trigger_ = new Trigger<std::string, std::string>();
+  Trigger<std::string, std::string> client_disconnected_trigger_;
 #endif
 
   // 4-byte aligned types

esphome/components/api/homeassistant_service.h

@@ -136,12 +136,10 @@ template<typename... Ts> class HomeAssistantServiceCallAction : public Action<Ts
   void set_wants_response() { this->flags_.wants_response = true; }
 
 #ifdef USE_API_HOMEASSISTANT_ACTION_RESPONSES_JSON
-  Trigger<JsonObjectConst, Ts...> *get_success_trigger_with_response() const {
+  Trigger<JsonObjectConst, Ts...> *get_success_trigger_with_response() { return &this->success_trigger_with_response_; }
-    return this->success_trigger_with_response_;
-  }
 #endif
-  Trigger<Ts...> *get_success_trigger() const { return this->success_trigger_; }
+  Trigger<Ts...> *get_success_trigger() { return &this->success_trigger_; }
-  Trigger<std::string, Ts...> *get_error_trigger() const { return this->error_trigger_; }
+  Trigger<std::string, Ts...> *get_error_trigger() { return &this->error_trigger_; }
 #endif  // USE_API_HOMEASSISTANT_ACTION_RESPONSES
 
   void play(const Ts &...x) override {
@@ -187,14 +185,14 @@ template<typename... Ts> class HomeAssistantServiceCallAction : public Action<Ts
               if (response.is_success()) {
 #ifdef USE_API_HOMEASSISTANT_ACTION_RESPONSES_JSON
                 if (this->flags_.wants_response) {
-                  this->success_trigger_with_response_->trigger(response.get_json(), args...);
+                  this->success_trigger_with_response_.trigger(response.get_json(), args...);
                 } else
 #endif
                 {
-                  this->success_trigger_->trigger(args...);
+                  this->success_trigger_.trigger(args...);
                 }
               } else {
-                this->error_trigger_->trigger(response.get_error_message(), args...);
+                this->error_trigger_.trigger(response.get_error_message(), args...);
               }
             },
             captured_args);
@@ -251,10 +249,10 @@ template<typename... Ts> class HomeAssistantServiceCallAction : public Action<Ts
 #ifdef USE_API_HOMEASSISTANT_ACTION_RESPONSES
 #ifdef USE_API_HOMEASSISTANT_ACTION_RESPONSES_JSON
   TemplatableStringValue<Ts...> response_template_{""};
-  Trigger<JsonObjectConst, Ts...> *success_trigger_with_response_ = new Trigger<JsonObjectConst, Ts...>();
+  Trigger<JsonObjectConst, Ts...> success_trigger_with_response_;
 #endif  // USE_API_HOMEASSISTANT_ACTION_RESPONSES_JSON
-  Trigger<Ts...> *success_trigger_ = new Trigger<Ts...>();
+  Trigger<Ts...> success_trigger_;
-  Trigger<std::string, Ts...> *error_trigger_ = new Trigger<std::string, Ts...>();
+  Trigger<std::string, Ts...> error_trigger_;
 #endif  // USE_API_HOMEASSISTANT_ACTION_RESPONSES
 
   struct Flags {

esphome/components/api/proto.h

@@ -402,6 +402,20 @@ class DumpBuffer {
   const char *c_str() const { return buf_; }
   size_t size() const { return pos_; }
 
+  /// Get writable buffer pointer for use with buf_append_printf
+  char *data() { return buf_; }
+  /// Get current position for use with buf_append_printf
+  size_t pos() const { return pos_; }
+  /// Update position after buf_append_printf call
+  void set_pos(size_t pos) {
+    if (pos >= CAPACITY) {
+      pos_ = CAPACITY - 1;
+    } else {
+      pos_ = pos;
+    }
+    buf_[pos_] = '\0';
+  }
+
  private:
   void append_impl_(const char *str, size_t len) {
     size_t space = CAPACITY - 1 - pos_;
@@ -943,32 +957,16 @@ class ProtoService {
   virtual bool is_connection_setup() = 0;
   virtual void on_fatal_error() = 0;
   virtual void on_no_setup_connection() = 0;
-  /**
-   * Create a buffer with a reserved size.
-   * @param reserve_size The number of bytes to pre-allocate in the buffer. This is a hint
-   *                     to optimize memory usage and avoid reallocations during encoding.
-   *                     Implementations should aim to allocate at least this size.
-   * @return A ProtoWriteBuffer object with the reserved size.
-   */
-  virtual ProtoWriteBuffer create_buffer(uint32_t reserve_size) = 0;
   virtual bool send_buffer(ProtoWriteBuffer buffer, uint8_t message_type) = 0;
   virtual void read_message(uint32_t msg_size, uint32_t msg_type, const uint8_t *msg_data) = 0;
-
+  /**
-  // Optimized method that pre-allocates buffer based on message size
+   * Send a protobuf message by calculating its size, allocating a buffer, encoding, and sending.
-  bool send_message_(const ProtoMessage &msg, uint8_t message_type) {
+   * This is the implementation method - callers should use send_message() which adds logging.
-    ProtoSize size;
+   * @param msg The protobuf message to send.
-    msg.calculate_size(size);
+   * @param message_type The message type identifier.
-    uint32_t msg_size = size.get_size();
+   * @return True if the message was sent successfully, false otherwise.
-
+   */
-    // Create a pre-sized buffer
+  virtual bool send_message_impl(const ProtoMessage &msg, uint8_t message_type) = 0;
-    auto buffer = this->create_buffer(msg_size);
-
-    // Encode message into the buffer
-    msg.encode(buffer);
-
-    // Send the buffer
-    return this->send_buffer(buffer, message_type);
-  }
 
   // Authentication helper methods
   inline bool check_connection_setup_() {

esphome/components/aqi/aqi_sensor.h

@@ -10,7 +10,6 @@ class AQISensor : public sensor::Sensor, public Component {
  public:
   void setup() override;
   void dump_config() override;
-  float get_setup_priority() const override { return setup_priority::DATA; }
 
   void set_pm_2_5_sensor(sensor::Sensor *sensor) { this->pm_2_5_sensor_ = sensor; }
   void set_pm_10_0_sensor(sensor::Sensor *sensor) { this->pm_10_0_sensor_ = sensor; }

esphome/components/as3935/as3935.cpp

@@ -41,8 +41,6 @@ void AS3935Component::dump_config() {
 #endif
 }
 
-float AS3935Component::get_setup_priority() const { return setup_priority::DATA; }
-
 void AS3935Component::loop() {
   if (!this->irq_pin_->digital_read())
     return;

esphome/components/as3935/as3935.h

@@ -74,7 +74,6 @@ class AS3935Component : public Component {
  public:
   void setup() override;
   void dump_config() override;
-  float get_setup_priority() const override;
   void loop() override;
 
   void set_irq_pin(GPIOPin *irq_pin) { irq_pin_ = irq_pin; }

esphome/components/as5600/sensor/as5600_sensor.cpp

@@ -22,8 +22,6 @@ static const uint8_t REGISTER_STATUS = 0x0B;     // 8 bytes  / R
 static const uint8_t REGISTER_AGC = 0x1A;        // 8 bytes  / R
 static const uint8_t REGISTER_MAGNITUDE = 0x1B;  // 16 bytes / R
 
-float AS5600Sensor::get_setup_priority() const { return setup_priority::DATA; }
-
 void AS5600Sensor::dump_config() {
   LOG_SENSOR("", "AS5600 Sensor", this);
   ESP_LOGCONFIG(TAG, "  Out of Range Mode: %u", this->out_of_range_mode_);

esphome/components/as5600/sensor/as5600_sensor.h

@@ -14,7 +14,6 @@ class AS5600Sensor : public PollingComponent, public Parented<AS5600Component>,
  public:
   void update() override;
   void dump_config() override;
-  float get_setup_priority() const override;
 
   void set_angle_sensor(sensor::Sensor *angle_sensor) { this->angle_sensor_ = angle_sensor; }
   void set_raw_angle_sensor(sensor::Sensor *raw_angle_sensor) { this->raw_angle_sensor_ = raw_angle_sensor; }

esphome/components/as7341/as7341.cpp

@@ -58,8 +58,6 @@ void AS7341Component::dump_config() {
   LOG_SENSOR("  ", "NIR", this->nir_);
 }
 
-float AS7341Component::get_setup_priority() const { return setup_priority::DATA; }
-
 void AS7341Component::update() {
   this->read_channels(this->channel_readings_);
 

esphome/components/as7341/as7341.h

@@ -78,7 +78,6 @@ class AS7341Component : public PollingComponent, public i2c::I2CDevice {
  public:
   void setup() override;
   void dump_config() override;
-  float get_setup_priority() const override;
   void update() override;
 
   void set_f1_sensor(sensor::Sensor *f1_sensor) { this->f1_ = f1_sensor; }

esphome/components/atm90e26/atm90e26.cpp

@@ -146,7 +146,6 @@ void ATM90E26Component::dump_config() {
   LOG_SENSOR("  ", "Active Reverse Energy A", this->reverse_active_energy_sensor_);
   LOG_SENSOR("  ", "Frequency", this->freq_sensor_);
 }
-float ATM90E26Component::get_setup_priority() const { return setup_priority::DATA; }
 
 uint16_t ATM90E26Component::read16_(uint8_t a_register) {
   uint8_t data[2];

esphome/components/atm90e26/atm90e26.h

@@ -13,7 +13,6 @@ class ATM90E26Component : public PollingComponent,
  public:
   void setup() override;
   void dump_config() override;
-  float get_setup_priority() const override;
   void update() override;
 
   void set_voltage_sensor(sensor::Sensor *obj) { this->voltage_sensor_ = obj; }

esphome/components/audio/__init__.py

@@ -1,5 +1,5 @@
 import esphome.codegen as cg
-from esphome.components.esp32 import add_idf_component
+from esphome.components.esp32 import add_idf_component, include_builtin_idf_component
 import esphome.config_validation as cv
 from esphome.const import CONF_BITS_PER_SAMPLE, CONF_NUM_CHANNELS, CONF_SAMPLE_RATE
 import esphome.final_validate as fv
@@ -166,6 +166,9 @@ def final_validate_audio_schema(
 
 
 async def to_code(config):
+    # Re-enable ESP-IDF's HTTP client (excluded by default to save compile time)
+    include_builtin_idf_component("esp_http_client")
+
     add_idf_component(
         name="esphome/esp-audio-libs",
         ref="2.0.3",

esphome/components/bang_bang/bang_bang_climate.cpp

@@ -6,8 +6,7 @@ namespace bang_bang {
 
 static const char *const TAG = "bang_bang.climate";
 
-BangBangClimate::BangBangClimate()
+BangBangClimate::BangBangClimate() = default;
-    : idle_trigger_(new Trigger<>()), cool_trigger_(new Trigger<>()), heat_trigger_(new Trigger<>()) {}
 
 void BangBangClimate::setup() {
   this->sensor_->add_on_state_callback([this](float state) {
@@ -160,13 +159,13 @@ void BangBangClimate::switch_to_action_(climate::ClimateAction action) {
   switch (action) {
     case climate::CLIMATE_ACTION_OFF:
     case climate::CLIMATE_ACTION_IDLE:
-      trig = this->idle_trigger_;
+      trig = &this->idle_trigger_;
       break;
     case climate::CLIMATE_ACTION_COOLING:
-      trig = this->cool_trigger_;
+      trig = &this->cool_trigger_;
       break;
     case climate::CLIMATE_ACTION_HEATING:
-      trig = this->heat_trigger_;
+      trig = &this->heat_trigger_;
       break;
     default:
       trig = nullptr;
@@ -204,9 +203,9 @@ void BangBangClimate::set_away_config(const BangBangClimateTargetTempConfig &awa
 void BangBangClimate::set_sensor(sensor::Sensor *sensor) { this->sensor_ = sensor; }
 void BangBangClimate::set_humidity_sensor(sensor::Sensor *humidity_sensor) { this->humidity_sensor_ = humidity_sensor; }
 
-Trigger<> *BangBangClimate::get_idle_trigger() const { return this->idle_trigger_; }
+Trigger<> *BangBangClimate::get_idle_trigger() { return &this->idle_trigger_; }
-Trigger<> *BangBangClimate::get_cool_trigger() const { return this->cool_trigger_; }
+Trigger<> *BangBangClimate::get_cool_trigger() { return &this->cool_trigger_; }
-Trigger<> *BangBangClimate::get_heat_trigger() const { return this->heat_trigger_; }
+Trigger<> *BangBangClimate::get_heat_trigger() { return &this->heat_trigger_; }
 
 void BangBangClimate::set_supports_cool(bool supports_cool) { this->supports_cool_ = supports_cool; }
 void BangBangClimate::set_supports_heat(bool supports_heat) { this->supports_heat_ = supports_heat; }

esphome/components/bang_bang/bang_bang_climate.h

@@ -30,9 +30,9 @@ class BangBangClimate : public climate::Climate, public Component {
   void set_normal_config(const BangBangClimateTargetTempConfig &normal_config);
   void set_away_config(const BangBangClimateTargetTempConfig &away_config);
 
-  Trigger<> *get_idle_trigger() const;
+  Trigger<> *get_idle_trigger();
-  Trigger<> *get_cool_trigger() const;
+  Trigger<> *get_cool_trigger();
-  Trigger<> *get_heat_trigger() const;
+  Trigger<> *get_heat_trigger();
 
  protected:
   /// Override control to change settings of the climate device.
@@ -57,17 +57,13 @@ class BangBangClimate : public climate::Climate, public Component {
    *
    * In idle mode, the controller is assumed to have both heating and cooling disabled.
    */
-  Trigger<> *idle_trigger_{nullptr};
+  Trigger<> idle_trigger_;
   /** The trigger to call when the controller should switch to cooling mode.
    */
-  Trigger<> *cool_trigger_{nullptr};
+  Trigger<> cool_trigger_;
   /** The trigger to call when the controller should switch to heating mode.
-   *
-   * A null value for this attribute means that the controller has no heating action
-   * For example window blinds, where only cooling (blinds closed) and not-cooling
-   * (blinds open) is possible.
    */
-  Trigger<> *heat_trigger_{nullptr};
+  Trigger<> heat_trigger_;
   /** A reference to the trigger that was previously active.
    *
    * This is so that the previous trigger can be stopped before enabling a new one.

esphome/components/bh1750/bh1750.cpp

@@ -265,6 +265,4 @@ void BH1750Sensor::fail_and_reset_() {
   this->state_ = IDLE;
 }
 
-float BH1750Sensor::get_setup_priority() const { return setup_priority::DATA; }
-
 }  // namespace esphome::bh1750

esphome/components/bh1750/bh1750.h

@@ -21,7 +21,6 @@ class BH1750Sensor : public sensor::Sensor, public PollingComponent, public i2c:
   void dump_config() override;
   void update() override;
   void loop() override;
-  float get_setup_priority() const override;
 
  protected:
   // State machine states

esphome/components/bme280_base/bme280_base.cpp

@@ -199,7 +199,6 @@ void BME280Component::dump_config() {
   LOG_SENSOR("  ", "Humidity", this->humidity_sensor_);
   ESP_LOGCONFIG(TAG, "    Oversampling: %s", oversampling_to_str(this->humidity_oversampling_));
 }
-float BME280Component::get_setup_priority() const { return setup_priority::DATA; }
 
 inline uint8_t oversampling_to_time(BME280Oversampling over_sampling) { return (1 << uint8_t(over_sampling)) >> 1; }
 

esphome/components/bme280_base/bme280_base.h

@@ -76,7 +76,6 @@ class BME280Component : public PollingComponent {
   // (In most use cases you won't need these)
   void setup() override;
   void dump_config() override;
-  float get_setup_priority() const override;
   void update() override;
 
  protected:

esphome/components/bme680/bme680.cpp

@@ -233,8 +233,6 @@ void BME680Component::dump_config() {
   }
 }
 
-float BME680Component::get_setup_priority() const { return setup_priority::DATA; }
-
 void BME680Component::update() {
   uint8_t meas_control = 0;  // No need to fetch, we're setting all fields
   meas_control |= (this->temperature_oversampling_ & 0b111) << 5;

esphome/components/bme680/bme680.h

@@ -99,7 +99,6 @@ class BME680Component : public PollingComponent, public i2c::I2CDevice {
   // (In most use cases you won't need these)
   void setup() override;
   void dump_config() override;
-  float get_setup_priority() const override;
   void update() override;
 
  protected:

esphome/components/bme680_bsec/__init__.py

@@ -89,8 +89,9 @@ async def to_code(config):
         var.set_state_save_interval(config[CONF_STATE_SAVE_INTERVAL].total_milliseconds)
     )
 
-    # Although this component does not use SPI, the BSEC library requires the SPI library
+    # Although this component does not use SPI/Wire directly, the BSEC library requires them
     cg.add_library("SPI", None)
+    cg.add_library("Wire", None)
 
     cg.add_define("USE_BSEC")
     cg.add_library("boschsensortec/BSEC Software Library", "1.6.1480")

esphome/components/bme680_bsec/bme680_bsec.cpp

@@ -181,8 +181,6 @@ void BME680BSECComponent::dump_config() {
   LOG_SENSOR("  ", "Breath VOC Equivalent", this->breath_voc_equivalent_sensor_);
 }
 
-float BME680BSECComponent::get_setup_priority() const { return setup_priority::DATA; }
-
 void BME680BSECComponent::loop() {
   this->run_();
 

esphome/components/bme680_bsec/bme680_bsec.h

@@ -64,7 +64,6 @@ class BME680BSECComponent : public Component, public i2c::I2CDevice {
 
   void setup() override;
   void dump_config() override;
-  float get_setup_priority() const override;
   void loop() override;
 
  protected:

esphome/components/bme68x_bsec2/bme68x_bsec2.cpp

@@ -106,8 +106,6 @@ void BME68xBSEC2Component::dump_config() {
 #endif
 }
 
-float BME68xBSEC2Component::get_setup_priority() const { return setup_priority::DATA; }
-
 void BME68xBSEC2Component::loop() {
   this->run_();
 

esphome/components/bme68x_bsec2/bme68x_bsec2.h

@@ -48,7 +48,6 @@ class BME68xBSEC2Component : public Component {
  public:
   void setup() override;
   void dump_config() override;
-  float get_setup_priority() const override;
   void loop() override;
 
   void set_algorithm_output(AlgorithmOutput algorithm_output) { this->algorithm_output_ = algorithm_output; }

esphome/components/bmi160/bmi160.cpp

@@ -263,7 +263,6 @@ void BMI160Component::update() {
 
   this->status_clear_warning();
 }
-float BMI160Component::get_setup_priority() const { return setup_priority::DATA; }
 
 }  // namespace bmi160
 }  // namespace esphome

esphome/components/bmi160/bmi160.h

@@ -14,8 +14,6 @@ class BMI160Component : public PollingComponent, public i2c::I2CDevice {
 
   void update() override;
 
-  float get_setup_priority() const override;
-
   void set_accel_x_sensor(sensor::Sensor *accel_x_sensor) { accel_x_sensor_ = accel_x_sensor; }
   void set_accel_y_sensor(sensor::Sensor *accel_y_sensor) { accel_y_sensor_ = accel_y_sensor; }
   void set_accel_z_sensor(sensor::Sensor *accel_z_sensor) { accel_z_sensor_ = accel_z_sensor; }

esphome/components/bmp085/bmp085.cpp

@@ -131,7 +131,6 @@ bool BMP085Component::set_mode_(uint8_t mode) {
   ESP_LOGV(TAG, "Setting mode to 0x%02X", mode);
   return this->write_byte(BMP085_REGISTER_CONTROL, mode);
 }
-float BMP085Component::get_setup_priority() const { return setup_priority::DATA; }
 
 }  // namespace bmp085
 }  // namespace esphome

esphome/components/bmp085/bmp085.h

@@ -18,8 +18,6 @@ class BMP085Component : public PollingComponent, public i2c::I2CDevice {
   void setup() override;
   void dump_config() override;
 
-  float get_setup_priority() const override;
-
  protected:
   struct CalibrationData {
     int16_t ac1, ac2, ac3;

esphome/components/bmp280_base/bmp280_base.cpp

@@ -148,7 +148,6 @@ void BMP280Component::dump_config() {
   LOG_SENSOR("  ", "Pressure", this->pressure_sensor_);
   ESP_LOGCONFIG(TAG, "    Oversampling: %s", oversampling_to_str(this->pressure_oversampling_));
 }
-float BMP280Component::get_setup_priority() const { return setup_priority::DATA; }
 
 inline uint8_t oversampling_to_time(BMP280Oversampling over_sampling) { return (1 << uint8_t(over_sampling)) >> 1; }
 

esphome/components/bmp280_base/bmp280_base.h

@@ -64,7 +64,6 @@ class BMP280Component : public PollingComponent {
 
   void setup() override;
   void dump_config() override;
-  float get_setup_priority() const override;
   void update() override;
 
  protected:

esphome/components/bmp3xx_base/bmp3xx_base.cpp

@@ -179,7 +179,6 @@ void BMP3XXComponent::dump_config() {
     ESP_LOGCONFIG(TAG, "    Oversampling: %s", LOG_STR_ARG(oversampling_to_str(this->pressure_oversampling_)));
   }
 }
-float BMP3XXComponent::get_setup_priority() const { return setup_priority::DATA; }
 
 inline uint8_t oversampling_to_time(Oversampling over_sampling) { return (1 << uint8_t(over_sampling)); }
 

esphome/components/bmp3xx_base/bmp3xx_base.h

@@ -73,7 +73,6 @@ class BMP3XXComponent : public PollingComponent {
  public:
   void setup() override;
   void dump_config() override;
-  float get_setup_priority() const override;
   void update() override;
 
   void set_temperature_sensor(sensor::Sensor *temperature_sensor) { temperature_sensor_ = temperature_sensor; }

esphome/components/cc1101/cc1101.cpp

@@ -156,7 +156,7 @@ void CC1101Component::call_listeners_(const std::vector<uint8_t> &packet, float
   for (auto &listener : this->listeners_) {
     listener->on_packet(packet, freq_offset, rssi, lqi);
   }
-  this->packet_trigger_->trigger(packet, freq_offset, rssi, lqi);
+  this->packet_trigger_.trigger(packet, freq_offset, rssi, lqi);
 }
 
 void CC1101Component::loop() {

esphome/components/cc1101/cc1101.h

@@ -79,7 +79,7 @@ class CC1101Component : public Component,
   // Packet mode operations
   CC1101Error transmit_packet(const std::vector<uint8_t> &packet);
   void register_listener(CC1101Listener *listener) { this->listeners_.push_back(listener); }
-  Trigger<std::vector<uint8_t>, float, float, uint8_t> *get_packet_trigger() const { return this->packet_trigger_; }
+  Trigger<std::vector<uint8_t>, float, float, uint8_t> *get_packet_trigger() { return &this->packet_trigger_; }
 
  protected:
   uint16_t chip_id_{0};
@@ -96,8 +96,7 @@ class CC1101Component : public Component,
 
   // Packet handling
   void call_listeners_(const std::vector<uint8_t> &packet, float freq_offset, float rssi, uint8_t lqi);
-  Trigger<std::vector<uint8_t>, float, float, uint8_t> *packet_trigger_{
+  Trigger<std::vector<uint8_t>, float, float, uint8_t> packet_trigger_;
-      new Trigger<std::vector<uint8_t>, float, float, uint8_t>()};
   std::vector<uint8_t> packet_;
   std::vector<CC1101Listener *> listeners_;
 

esphome/components/cd74hc4067/cd74hc4067.cpp

@@ -7,8 +7,6 @@ namespace cd74hc4067 {
 
 static const char *const TAG = "cd74hc4067";
 
-float CD74HC4067Component::get_setup_priority() const { return setup_priority::DATA; }
-
 void CD74HC4067Component::setup() {
   this->pin_s0_->setup();
   this->pin_s1_->setup();

esphome/components/cd74hc4067/cd74hc4067.h

@@ -13,7 +13,6 @@ class CD74HC4067Component : public Component {
   /// Set up the internal sensor array.
   void setup() override;
   void dump_config() override;
-  float get_setup_priority() const override;
 
   /// setting pin active by setting the right combination of the four multiplexer input pins
   void activate_pin(uint8_t pin);

esphome/components/ch423/__init__.py

@@ -0,0 +1,103 @@
+from esphome import pins
+import esphome.codegen as cg
+from esphome.components import i2c
+from esphome.components.i2c import I2CBus
+import esphome.config_validation as cv
+from esphome.const import (
+    CONF_I2C_ID,
+    CONF_ID,
+    CONF_INPUT,
+    CONF_INVERTED,
+    CONF_MODE,
+    CONF_NUMBER,
+    CONF_OPEN_DRAIN,
+    CONF_OUTPUT,
+)
+from esphome.core import CORE
+
+CODEOWNERS = ["@dwmw2"]
+DEPENDENCIES = ["i2c"]
+MULTI_CONF = True
+ch423_ns = cg.esphome_ns.namespace("ch423")
+
+CH423Component = ch423_ns.class_("CH423Component", cg.Component, i2c.I2CDevice)
+CH423GPIOPin = ch423_ns.class_(
+    "CH423GPIOPin", cg.GPIOPin, cg.Parented.template(CH423Component)
+)
+
+CONF_CH423 = "ch423"
+
+# Note that no address is configurable - each register in the CH423 has a dedicated i2c address
+CONFIG_SCHEMA = cv.Schema(
+    {
+        cv.GenerateID(CONF_ID): cv.declare_id(CH423Component),
+        cv.GenerateID(CONF_I2C_ID): cv.use_id(I2CBus),
+    }
+).extend(cv.COMPONENT_SCHEMA)
+
+
+async def to_code(config):
+    var = cg.new_Pvariable(config[CONF_ID])
+    await cg.register_component(var, config)
+    # Can't use register_i2c_device because there is no CONF_ADDRESS
+    parent = await cg.get_variable(config[CONF_I2C_ID])
+    cg.add(var.set_i2c_bus(parent))
+
+
+# This is used as a final validation step so that modes have been fully transformed.
+def pin_mode_check(pin_config, _):
+    if pin_config[CONF_MODE][CONF_INPUT] and pin_config[CONF_NUMBER] >= 8:
+        raise cv.Invalid("CH423 only supports input on pins 0-7")
+    if pin_config[CONF_MODE][CONF_OPEN_DRAIN] and pin_config[CONF_NUMBER] < 8:
+        raise cv.Invalid("CH423 only supports open drain output on pins 8-23")
+
+    ch423_id = pin_config[CONF_CH423]
+    pin_num = pin_config[CONF_NUMBER]
+    is_output = pin_config[CONF_MODE][CONF_OUTPUT]
+    is_open_drain = pin_config[CONF_MODE][CONF_OPEN_DRAIN]
+
+    # Track pin modes per CH423 instance in CORE.data
+    ch423_modes = CORE.data.setdefault(CONF_CH423, {})
+    if ch423_id not in ch423_modes:
+        ch423_modes[ch423_id] = {"gpio_output": None, "gpo_open_drain": None}
+
+    if pin_num < 8:
+        # GPIO pins (0-7): all must have same direction
+        if ch423_modes[ch423_id]["gpio_output"] is None:
+            ch423_modes[ch423_id]["gpio_output"] = is_output
+        elif ch423_modes[ch423_id]["gpio_output"] != is_output:
+            raise cv.Invalid(
+                "CH423 GPIO pins (0-7) must all be configured as input or all as output"
+            )
+    # GPO pins (8-23): all must have same open-drain setting
+    elif ch423_modes[ch423_id]["gpo_open_drain"] is None:
+        ch423_modes[ch423_id]["gpo_open_drain"] = is_open_drain
+    elif ch423_modes[ch423_id]["gpo_open_drain"] != is_open_drain:
+        raise cv.Invalid(
+            "CH423 GPO pins (8-23) must all be configured as push-pull or all as open-drain"
+        )
+
+
+CH423_PIN_SCHEMA = pins.gpio_base_schema(
+    CH423GPIOPin,
+    cv.int_range(min=0, max=23),
+    modes=[CONF_INPUT, CONF_OUTPUT, CONF_OPEN_DRAIN],
+).extend(
+    {
+        cv.Required(CONF_CH423): cv.use_id(CH423Component),
+    }
+)
+
+
+@pins.PIN_SCHEMA_REGISTRY.register(CONF_CH423, CH423_PIN_SCHEMA, pin_mode_check)
+async def ch423_pin_to_code(config):
+    var = cg.new_Pvariable(config[CONF_ID])
+    parent = await cg.get_variable(config[CONF_CH423])
+
+    cg.add(var.set_parent(parent))
+
+    num = config[CONF_NUMBER]
+    cg.add(var.set_pin(num))
+    cg.add(var.set_inverted(config[CONF_INVERTED]))
+    cg.add(var.set_flags(pins.gpio_flags_expr(config[CONF_MODE])))
+    return var

esphome/components/ch423/ch423.cpp

@@ -0,0 +1,148 @@
+#include "ch423.h"
+#include "esphome/core/log.h"
+#include "esphome/core/progmem.h"
+
+namespace esphome::ch423 {
+
+static constexpr uint8_t CH423_REG_SYS = 0x24;    // Set system parameters (0x48 >> 1)
+static constexpr uint8_t CH423_SYS_IO_OE = 0x01;  // IO output enable
+static constexpr uint8_t CH423_SYS_OD_EN = 0x04;  // Open drain enable for OC pins
+static constexpr uint8_t CH423_REG_IO = 0x30;     // Write/read IO7-IO0 (0x60 >> 1)
+static constexpr uint8_t CH423_REG_IO_RD = 0x26;  // Read IO7-IO0 (0x4D >> 1, rounded down)
+static constexpr uint8_t CH423_REG_OCL = 0x22;    // Write OC7-OC0 (0x44 >> 1)
+static constexpr uint8_t CH423_REG_OCH = 0x23;    // Write OC15-OC8 (0x46 >> 1)
+
+static const char *const TAG = "ch423";
+
+void CH423Component::setup() {
+  // set outputs before mode
+  this->write_outputs_();
+  // Set system parameters and check for errors
+  bool success = this->write_reg_(CH423_REG_SYS, this->sys_params_);
+  // Only read inputs if pins are configured for input (IO_OE not set)
+  if (success && !(this->sys_params_ & CH423_SYS_IO_OE)) {
+    success = this->read_inputs_();
+  }
+  if (!success) {
+    ESP_LOGE(TAG, "CH423 not detected");
+    this->mark_failed();
+    return;
+  }
+
+  ESP_LOGCONFIG(TAG, "Initialization complete. Warning: %d, Error: %d", this->status_has_warning(),
+                this->status_has_error());
+}
+
+void CH423Component::loop() {
+  // Clear all the previously read flags.
+  this->pin_read_flags_ = 0x00;
+}
+
+void CH423Component::dump_config() {
+  ESP_LOGCONFIG(TAG, "CH423:");
+  if (this->is_failed()) {
+    ESP_LOGE(TAG, ESP_LOG_MSG_COMM_FAIL);
+  }
+}
+
+void CH423Component::pin_mode(uint8_t pin, gpio::Flags flags) {
+  if (pin < 8) {
+    if (flags & gpio::FLAG_OUTPUT) {
+      this->sys_params_ |= CH423_SYS_IO_OE;
+    }
+  } else if (pin >= 8 && pin < 24) {
+    if (flags & gpio::FLAG_OPEN_DRAIN) {
+      this->sys_params_ |= CH423_SYS_OD_EN;
+    }
+  }
+}
+
+bool CH423Component::digital_read(uint8_t pin) {
+  if (this->pin_read_flags_ == 0 || this->pin_read_flags_ & (1 << pin)) {
+    // Read values on first access or in case it's being read again in the same loop
+    this->read_inputs_();
+  }
+
+  this->pin_read_flags_ |= (1 << pin);
+  return (this->input_bits_ & (1 << pin)) != 0;
+}
+
+void CH423Component::digital_write(uint8_t pin, bool value) {
+  if (value) {
+    this->output_bits_ |= (1 << pin);
+  } else {
+    this->output_bits_ &= ~(1 << pin);
+  }
+  this->write_outputs_();
+}
+
+bool CH423Component::read_inputs_() {
+  if (this->is_failed()) {
+    return false;
+  }
+  // reading inputs requires IO_OE to be 0
+  if (this->sys_params_ & CH423_SYS_IO_OE) {
+    return false;
+  }
+  uint8_t result = this->read_reg_(CH423_REG_IO_RD);
+  this->input_bits_ = result;
+  this->status_clear_warning();
+  return true;
+}
+
+// Write a register. Can't use the standard write_byte() method because there is no single pre-configured i2c address.
+bool CH423Component::write_reg_(uint8_t reg, uint8_t value) {
+  auto err = this->bus_->write_readv(reg, &value, 1, nullptr, 0);
+  if (err != i2c::ERROR_OK) {
+    char buf[64];
+    ESPHOME_snprintf_P(buf, sizeof(buf), ESPHOME_PSTR("write failed for register 0x%X, error %d"), reg, err);
+    this->status_set_warning(buf);
+    return false;
+  }
+  this->status_clear_warning();
+  return true;
+}
+
+uint8_t CH423Component::read_reg_(uint8_t reg) {
+  uint8_t value;
+  auto err = this->bus_->write_readv(reg, nullptr, 0, &value, 1);
+  if (err != i2c::ERROR_OK) {
+    char buf[64];
+    ESPHOME_snprintf_P(buf, sizeof(buf), ESPHOME_PSTR("read failed for register 0x%X, error %d"), reg, err);
+    this->status_set_warning(buf);
+    return 0;
+  }
+  this->status_clear_warning();
+  return value;
+}
+
+bool CH423Component::write_outputs_() {
+  bool success = true;
+  // Write IO7-IO0
+  success &= this->write_reg_(CH423_REG_IO, static_cast<uint8_t>(this->output_bits_));
+  // Write OC7-OC0
+  success &= this->write_reg_(CH423_REG_OCL, static_cast<uint8_t>(this->output_bits_ >> 8));
+  // Write OC15-OC8
+  success &= this->write_reg_(CH423_REG_OCH, static_cast<uint8_t>(this->output_bits_ >> 16));
+  return success;
+}
+
+float CH423Component::get_setup_priority() const { return setup_priority::IO; }
+
+// Run our loop() method very early in the loop, so that we cache read values
+// before other components call our digital_read() method.
+float CH423Component::get_loop_priority() const { return 9.0f; }  // Just after WIFI
+
+void CH423GPIOPin::pin_mode(gpio::Flags flags) { this->parent_->pin_mode(this->pin_, flags); }
+bool CH423GPIOPin::digital_read() { return this->parent_->digital_read(this->pin_) ^ this->inverted_; }
+
+void CH423GPIOPin::digital_write(bool value) { this->parent_->digital_write(this->pin_, value ^ this->inverted_); }
+size_t CH423GPIOPin::dump_summary(char *buffer, size_t len) const {
+  return snprintf(buffer, len, "EXIO%u via CH423", this->pin_);
+}
+void CH423GPIOPin::set_flags(gpio::Flags flags) {
+  flags_ = flags;
+  this->parent_->pin_mode(this->pin_, flags);
+}
+
+}  // namespace esphome::ch423

esphome/components/ch423/ch423.h

@@ -0,0 +1,67 @@
+#pragma once
+
+#include "esphome/core/component.h"
+#include "esphome/core/hal.h"
+#include "esphome/components/i2c/i2c.h"
+
+namespace esphome::ch423 {
+
+class CH423Component : public Component, public i2c::I2CDevice {
+ public:
+  CH423Component() = default;
+
+  /// Check i2c availability and setup masks
+  void setup() override;
+  /// Poll for input changes periodically
+  void loop() override;
+  /// Helper function to read the value of a pin.
+  bool digital_read(uint8_t pin);
+  /// Helper function to write the value of a pin.
+  void digital_write(uint8_t pin, bool value);
+  /// Helper function to set the pin mode of a pin.
+  void pin_mode(uint8_t pin, gpio::Flags flags);
+
+  float get_setup_priority() const override;
+  float get_loop_priority() const override;
+  void dump_config() override;
+
+ protected:
+  bool write_reg_(uint8_t reg, uint8_t value);
+  uint8_t read_reg_(uint8_t reg);
+  bool read_inputs_();
+  bool write_outputs_();
+
+  /// The mask to write as output state - 1 means HIGH, 0 means LOW
+  uint32_t output_bits_{0x00};
+  /// Flags to check if read previously during this loop
+  uint8_t pin_read_flags_{0x00};
+  /// Copy of last read values
+  uint8_t input_bits_{0x00};
+  /// System parameters
+  uint8_t sys_params_{0x00};
+};
+
+/// Helper class to expose a CH423 pin as a GPIO pin.
+class CH423GPIOPin : public GPIOPin {
+ public:
+  void setup() override{};
+  void pin_mode(gpio::Flags flags) override;
+  bool digital_read() override;
+  void digital_write(bool value) override;
+  size_t dump_summary(char *buffer, size_t len) const override;
+
+  void set_parent(CH423Component *parent) { parent_ = parent; }
+  void set_pin(uint8_t pin) { pin_ = pin; }
+  void set_inverted(bool inverted) { inverted_ = inverted; }
+  void set_flags(gpio::Flags flags);
+
+  gpio::Flags get_flags() const override { return this->flags_; }
+
+ protected:
+  CH423Component *parent_{};
+  uint8_t pin_{};
+  bool inverted_{};
+  gpio::Flags flags_{};
+};
+
+}  // namespace esphome::ch423

esphome/components/climate/climate_mode.cpp

@@ -1,109 +1,44 @@
 #include "climate_mode.h"
+#include "esphome/core/progmem.h"
 
 namespace esphome::climate {
 
+// Climate mode strings indexed by ClimateMode enum (0-6): OFF, HEAT_COOL, COOL, HEAT, FAN_ONLY, DRY, AUTO
+PROGMEM_STRING_TABLE(ClimateModeStrings, "OFF", "HEAT_COOL", "COOL", "HEAT", "FAN_ONLY", "DRY", "AUTO", "UNKNOWN");
+
 const LogString *climate_mode_to_string(ClimateMode mode) {
-  switch (mode) {
+  return ClimateModeStrings::get_log_str(static_cast<uint8_t>(mode), ClimateModeStrings::LAST_INDEX);
-    case CLIMATE_MODE_OFF:
-      return LOG_STR("OFF");
-    case CLIMATE_MODE_HEAT_COOL:
-      return LOG_STR("HEAT_COOL");
-    case CLIMATE_MODE_AUTO:
-      return LOG_STR("AUTO");
-    case CLIMATE_MODE_COOL:
-      return LOG_STR("COOL");
-    case CLIMATE_MODE_HEAT:
-      return LOG_STR("HEAT");
-    case CLIMATE_MODE_FAN_ONLY:
-      return LOG_STR("FAN_ONLY");
-    case CLIMATE_MODE_DRY:
-      return LOG_STR("DRY");
-    default:
-      return LOG_STR("UNKNOWN");
-  }
 }
+
+// Climate action strings indexed by ClimateAction enum (0,2-6): OFF, (gap), COOLING, HEATING, IDLE, DRYING, FAN
+PROGMEM_STRING_TABLE(ClimateActionStrings, "OFF", "UNKNOWN", "COOLING", "HEATING", "IDLE", "DRYING", "FAN", "UNKNOWN");
+
 const LogString *climate_action_to_string(ClimateAction action) {
-  switch (action) {
+  return ClimateActionStrings::get_log_str(static_cast<uint8_t>(action), ClimateActionStrings::LAST_INDEX);
-    case CLIMATE_ACTION_OFF:
-      return LOG_STR("OFF");
-    case CLIMATE_ACTION_COOLING:
-      return LOG_STR("COOLING");
-    case CLIMATE_ACTION_HEATING:
-      return LOG_STR("HEATING");
-    case CLIMATE_ACTION_IDLE:
-      return LOG_STR("IDLE");
-    case CLIMATE_ACTION_DRYING:
-      return LOG_STR("DRYING");
-    case CLIMATE_ACTION_FAN:
-      return LOG_STR("FAN");
-    default:
-      return LOG_STR("UNKNOWN");
-  }
 }
 
+// Climate fan mode strings indexed by ClimateFanMode enum (0-9): ON, OFF, AUTO, LOW, MEDIUM, HIGH, MIDDLE, FOCUS,
+// DIFFUSE, QUIET
+PROGMEM_STRING_TABLE(ClimateFanModeStrings, "ON", "OFF", "AUTO", "LOW", "MEDIUM", "HIGH", "MIDDLE", "FOCUS", "DIFFUSE",
+                     "QUIET", "UNKNOWN");
+
 const LogString *climate_fan_mode_to_string(ClimateFanMode fan_mode) {
-  switch (fan_mode) {
+  return ClimateFanModeStrings::get_log_str(static_cast<uint8_t>(fan_mode), ClimateFanModeStrings::LAST_INDEX);
-    case climate::CLIMATE_FAN_ON:
-      return LOG_STR("ON");
-    case climate::CLIMATE_FAN_OFF:
-      return LOG_STR("OFF");
-    case climate::CLIMATE_FAN_AUTO:
-      return LOG_STR("AUTO");
-    case climate::CLIMATE_FAN_LOW:
-      return LOG_STR("LOW");
-    case climate::CLIMATE_FAN_MEDIUM:
-      return LOG_STR("MEDIUM");
-    case climate::CLIMATE_FAN_HIGH:
-      return LOG_STR("HIGH");
-    case climate::CLIMATE_FAN_MIDDLE:
-      return LOG_STR("MIDDLE");
-    case climate::CLIMATE_FAN_FOCUS:
-      return LOG_STR("FOCUS");
-    case climate::CLIMATE_FAN_DIFFUSE:
-      return LOG_STR("DIFFUSE");
-    case climate::CLIMATE_FAN_QUIET:
-      return LOG_STR("QUIET");
-    default:
-      return LOG_STR("UNKNOWN");
-  }
 }
 
+// Climate swing mode strings indexed by ClimateSwingMode enum (0-3): OFF, BOTH, VERTICAL, HORIZONTAL
+PROGMEM_STRING_TABLE(ClimateSwingModeStrings, "OFF", "BOTH", "VERTICAL", "HORIZONTAL", "UNKNOWN");
+
 const LogString *climate_swing_mode_to_string(ClimateSwingMode swing_mode) {
-  switch (swing_mode) {
+  return ClimateSwingModeStrings::get_log_str(static_cast<uint8_t>(swing_mode), ClimateSwingModeStrings::LAST_INDEX);
-    case climate::CLIMATE_SWING_OFF:
-      return LOG_STR("OFF");
-    case climate::CLIMATE_SWING_BOTH:
-      return LOG_STR("BOTH");
-    case climate::CLIMATE_SWING_VERTICAL:
-      return LOG_STR("VERTICAL");
-    case climate::CLIMATE_SWING_HORIZONTAL:
-      return LOG_STR("HORIZONTAL");
-    default:
-      return LOG_STR("UNKNOWN");
-  }
 }
 
+// Climate preset strings indexed by ClimatePreset enum (0-7): NONE, HOME, AWAY, BOOST, COMFORT, ECO, SLEEP, ACTIVITY
+PROGMEM_STRING_TABLE(ClimatePresetStrings, "NONE", "HOME", "AWAY", "BOOST", "COMFORT", "ECO", "SLEEP", "ACTIVITY",
+                     "UNKNOWN");
+
 const LogString *climate_preset_to_string(ClimatePreset preset) {
-  switch (preset) {
+  return ClimatePresetStrings::get_log_str(static_cast<uint8_t>(preset), ClimatePresetStrings::LAST_INDEX);
-    case climate::CLIMATE_PRESET_NONE:
-      return LOG_STR("NONE");
-    case climate::CLIMATE_PRESET_HOME:
-      return LOG_STR("HOME");
-    case climate::CLIMATE_PRESET_ECO:
-      return LOG_STR("ECO");
-    case climate::CLIMATE_PRESET_AWAY:
-      return LOG_STR("AWAY");
-    case climate::CLIMATE_PRESET_BOOST:
-      return LOG_STR("BOOST");
-    case climate::CLIMATE_PRESET_COMFORT:
-      return LOG_STR("COMFORT");
-    case climate::CLIMATE_PRESET_SLEEP:
-      return LOG_STR("SLEEP");
-    case climate::CLIMATE_PRESET_ACTIVITY:
-      return LOG_STR("ACTIVITY");
-    default:
-      return LOG_STR("UNKNOWN");
-  }
 }
 
 }  // namespace esphome::climate

esphome/components/cm1106/cm1106.h

@@ -10,8 +10,6 @@ namespace cm1106 {
 
 class CM1106Component : public PollingComponent, public uart::UARTDevice {
  public:
-  float get_setup_priority() const override { return esphome::setup_priority::DATA; }
-
   void setup() override;
   void update() override;
   void dump_config() override;

esphome/components/combination/combination.h

@@ -10,8 +10,6 @@ namespace combination {
 
 class CombinationComponent : public Component, public sensor::Sensor {
  public:
-  float get_setup_priority() const override { return esphome::setup_priority::DATA; }
-
   /// @brief Logs all source sensor's names
   virtual void log_source_sensors() = 0;
 

esphome/components/const/__init__.py

@@ -17,3 +17,9 @@ CONF_ON_STATE_CHANGE = "on_state_change"
 CONF_REQUEST_HEADERS = "request_headers"
 CONF_ROWS = "rows"
 CONF_USE_PSRAM = "use_psram"
+
+ICON_CURRENT_DC = "mdi:current-dc"
+ICON_SOLAR_PANEL = "mdi:solar-panel"
+ICON_SOLAR_POWER = "mdi:solar-power"
+
+UNIT_AMPERE_HOUR = "Ah"

esphome/components/cover/__init__.py

@@ -1,3 +1,5 @@
+import logging
+
 from esphome import automation
 from esphome.automation import Condition, maybe_simple_id
 import esphome.codegen as cg
@@ -9,6 +11,7 @@ from esphome.const import (
     CONF_ICON,
     CONF_ID,
     CONF_MQTT_ID,
+    CONF_ON_IDLE,
     CONF_ON_OPEN,
     CONF_POSITION,
     CONF_POSITION_COMMAND_TOPIC,
@@ -32,9 +35,10 @@ from esphome.const import (
     DEVICE_CLASS_SHUTTER,
     DEVICE_CLASS_WINDOW,
 )
-from esphome.core import CORE, CoroPriority, coroutine_with_priority
+from esphome.core import CORE, ID, CoroPriority, coroutine_with_priority
 from esphome.core.entity_helpers import entity_duplicate_validator, setup_entity
-from esphome.cpp_generator import MockObjClass
+from esphome.cpp_generator import MockObj, MockObjClass
+from esphome.types import ConfigType, TemplateArgsType
 
 IS_PLATFORM_COMPONENT = True
 
@@ -53,6 +57,8 @@ DEVICE_CLASSES = [
     DEVICE_CLASS_WINDOW,
 ]
 
+_LOGGER = logging.getLogger(__name__)
+
 cover_ns = cg.esphome_ns.namespace("cover")
 
 Cover = cover_ns.class_("Cover", cg.EntityBase)
@@ -83,14 +89,29 @@ ControlAction = cover_ns.class_("ControlAction", automation.Action)
 CoverPublishAction = cover_ns.class_("CoverPublishAction", automation.Action)
 CoverIsOpenCondition = cover_ns.class_("CoverIsOpenCondition", Condition)
 CoverIsClosedCondition = cover_ns.class_("CoverIsClosedCondition", Condition)
-
+CoverOpenedTrigger = cover_ns.class_(
-# Triggers
+    "CoverOpenedTrigger", automation.Trigger.template()
-CoverOpenTrigger = cover_ns.class_("CoverOpenTrigger", automation.Trigger.template())
+)
 CoverClosedTrigger = cover_ns.class_(
     "CoverClosedTrigger", automation.Trigger.template()
 )
+CoverTrigger = cover_ns.class_("CoverTrigger", automation.Trigger.template())
 
+# Cover-specific constants
 CONF_ON_CLOSED = "on_closed"
+CONF_ON_OPENED = "on_opened"
+CONF_ON_OPENING = "on_opening"
+CONF_ON_CLOSING = "on_closing"
+
+TRIGGERS = {
+    CONF_ON_OPEN: CoverOpenedTrigger,  # Deprecated, use on_opened
+    CONF_ON_OPENED: CoverOpenedTrigger,
+    CONF_ON_CLOSED: CoverClosedTrigger,
+    CONF_ON_CLOSING: CoverTrigger.template(CoverOperation.COVER_OPERATION_CLOSING),
+    CONF_ON_OPENING: CoverTrigger.template(CoverOperation.COVER_OPERATION_OPENING),
+    CONF_ON_IDLE: CoverTrigger.template(CoverOperation.COVER_OPERATION_IDLE),
+}
+
 
 _COVER_SCHEMA = (
     cv.ENTITY_BASE_SCHEMA.extend(web_server.WEBSERVER_SORTING_SCHEMA)
@@ -111,16 +132,14 @@ _COVER_SCHEMA = (
             cv.Optional(CONF_TILT_STATE_TOPIC): cv.All(
                 cv.requires_component("mqtt"), cv.subscribe_topic
             ),
-            cv.Optional(CONF_ON_OPEN): automation.validate_automation(
+            **{
-                {
+                cv.Optional(conf): automation.validate_automation(
-                    cv.GenerateID(CONF_TRIGGER_ID): cv.declare_id(CoverOpenTrigger),
+                    {
-                }
+                        cv.GenerateID(CONF_TRIGGER_ID): cv.declare_id(trigger_class),
-            ),
+                    }
-            cv.Optional(CONF_ON_CLOSED): automation.validate_automation(
+                )
-                {
+                for conf, trigger_class in TRIGGERS.items()
-                    cv.GenerateID(CONF_TRIGGER_ID): cv.declare_id(CoverClosedTrigger),
+            },
-                }
-            ),
         }
     )
 )
@@ -157,12 +176,14 @@ async def setup_cover_core_(var, config):
     if (device_class := config.get(CONF_DEVICE_CLASS)) is not None:
         cg.add(var.set_device_class(device_class))
 
-    for conf in config.get(CONF_ON_OPEN, []):
+    if CONF_ON_OPEN in config:
-        trigger = cg.new_Pvariable(conf[CONF_TRIGGER_ID], var)
+        _LOGGER.warning(
-        await automation.build_automation(trigger, [], conf)
+            "'on_open' is deprecated, use 'on_opened'. Will be removed in 2026.8.0"
-    for conf in config.get(CONF_ON_CLOSED, []):
+        )
-        trigger = cg.new_Pvariable(conf[CONF_TRIGGER_ID], var)
+    for trigger_conf in TRIGGERS:
-        await automation.build_automation(trigger, [], conf)
+        for conf in config.get(trigger_conf, []):
+            trigger = cg.new_Pvariable(conf[CONF_TRIGGER_ID], var)
+            await automation.build_automation(trigger, [], conf)
 
     if (mqtt_id := config.get(CONF_MQTT_ID)) is not None:
         mqtt_ = cg.new_Pvariable(mqtt_id, var)
@@ -258,6 +279,26 @@ async def cover_control_to_code(config, action_id, template_arg, args):
     return var
 
 
+COVER_CONDITION_SCHEMA = cv.maybe_simple_value(
+    {cv.Required(CONF_ID): cv.use_id(Cover)}, key=CONF_ID
+)
+
+
+async def cover_condition_to_code(
+    config: ConfigType, condition_id: ID, template_arg: MockObj, args: TemplateArgsType
+) -> MockObj:
+    paren = await cg.get_variable(config[CONF_ID])
+    return cg.new_Pvariable(condition_id, template_arg, paren)
+
+
+automation.register_condition(
+    "cover.is_open", CoverIsOpenCondition, COVER_CONDITION_SCHEMA
+)(cover_condition_to_code)
+automation.register_condition(
+    "cover.is_closed", CoverIsClosedCondition, COVER_CONDITION_SCHEMA
+)(cover_condition_to_code)
+
+
 @coroutine_with_priority(CoroPriority.CORE)
 async def to_code(config):
     cg.add_global(cover_ns.using)

esphome/components/cover/automation.h

@@ -90,44 +90,53 @@ template<typename... Ts> class CoverPublishAction : public Action<Ts...> {
   Cover *cover_;
 };
 
-template<typename... Ts> class CoverIsOpenCondition : public Condition<Ts...> {
+template<bool OPEN, typename... Ts> class CoverPositionCondition : public Condition<Ts...> {
  public:
-  CoverIsOpenCondition(Cover *cover) : cover_(cover) {}
+  CoverPositionCondition(Cover *cover) : cover_(cover) {}
-  bool check(const Ts &...x) override { return this->cover_->is_fully_open(); }
+
+  bool check(const Ts &...x) override { return this->cover_->position == (OPEN ? COVER_OPEN : COVER_CLOSED); }
 
  protected:
   Cover *cover_;
 };
 
-template<typename... Ts> class CoverIsClosedCondition : public Condition<Ts...> {
+template<typename... Ts> using CoverIsOpenCondition = CoverPositionCondition<true, Ts...>;
+template<typename... Ts> using CoverIsClosedCondition = CoverPositionCondition<false, Ts...>;
+
+template<bool OPEN> class CoverPositionTrigger : public Trigger<> {
  public:
-  CoverIsClosedCondition(Cover *cover) : cover_(cover) {}
+  CoverPositionTrigger(Cover *a_cover) {
-  bool check(const Ts &...x) override { return this->cover_->is_fully_closed(); }
+    a_cover->add_on_state_callback([this, a_cover]() {
+      if (a_cover->position != this->last_position_) {
+        this->last_position_ = a_cover->position;
+        if (a_cover->position == (OPEN ? COVER_OPEN : COVER_CLOSED))
+          this->trigger();
+      }
+    });
+  }
 
  protected:
-  Cover *cover_;
+  float last_position_{NAN};
 };
 
-class CoverOpenTrigger : public Trigger<> {
+using CoverOpenedTrigger = CoverPositionTrigger<true>;
+using CoverClosedTrigger = CoverPositionTrigger<false>;
+
+template<CoverOperation OP> class CoverTrigger : public Trigger<> {
  public:
-  CoverOpenTrigger(Cover *a_cover) {
+  CoverTrigger(Cover *a_cover) {
     a_cover->add_on_state_callback([this, a_cover]() {
-      if (a_cover->is_fully_open()) {
+      auto current_op = a_cover->current_operation;
-        this->trigger();
+      if (current_op == OP) {
+        if (!this->last_operation_.has_value() || this->last_operation_.value() != OP) {
+          this->trigger();
+        }
       }
+      this->last_operation_ = current_op;
     });
   }
-};
 
-class CoverClosedTrigger : public Trigger<> {
+ protected:
- public:
+  optional<CoverOperation> last_operation_{};
-  CoverClosedTrigger(Cover *a_cover) {
-    a_cover->add_on_state_callback([this, a_cover]() {
-      if (a_cover->is_fully_closed()) {
-        this->trigger();
-      }
-    });
-  }
 };
-
 }  // namespace esphome::cover

esphome/components/cover/cover.cpp

@@ -10,9 +10,6 @@ namespace esphome::cover {
 
 static const char *const TAG = "cover";
 
-const float COVER_OPEN = 1.0f;
-const float COVER_CLOSED = 0.0f;
-
 const LogString *cover_command_to_str(float pos) {
   if (pos == COVER_OPEN) {
     return LOG_STR("OPEN");
@@ -22,17 +19,11 @@ const LogString *cover_command_to_str(float pos) {
     return LOG_STR("UNKNOWN");
   }
 }
+// Cover operation strings indexed by CoverOperation enum (0-2): IDLE, OPENING, CLOSING, plus UNKNOWN
+PROGMEM_STRING_TABLE(CoverOperationStrings, "IDLE", "OPENING", "CLOSING", "UNKNOWN");
+
 const LogString *cover_operation_to_str(CoverOperation op) {
-  switch (op) {
+  return CoverOperationStrings::get_log_str(static_cast<uint8_t>(op), CoverOperationStrings::LAST_INDEX);
-    case COVER_OPERATION_IDLE:
-      return LOG_STR("IDLE");
-    case COVER_OPERATION_OPENING:
-      return LOG_STR("OPENING");
-    case COVER_OPERATION_CLOSING:
-      return LOG_STR("CLOSING");
-    default:
-      return LOG_STR("UNKNOWN");
-  }
 }
 
 Cover::Cover() : position{COVER_OPEN} {}

esphome/components/cover/cover.h

@@ -10,8 +10,8 @@
 
 namespace esphome::cover {
 
-const extern float COVER_OPEN;
+static constexpr float COVER_OPEN = 1.0f;
-const extern float COVER_CLOSED;
+static constexpr float COVER_CLOSED = 0.0f;
 
 #define LOG_COVER(prefix, type, obj) \
   if ((obj) != nullptr) { \

esphome/components/cse7761/cse7761.cpp

@@ -62,8 +62,6 @@ void CSE7761Component::dump_config() {
   this->check_uart_settings(38400, 1, uart::UART_CONFIG_PARITY_EVEN, 8);
 }
 
-float CSE7761Component::get_setup_priority() const { return setup_priority::DATA; }
-
 void CSE7761Component::update() {
   if (this->data_.ready) {
     this->get_data_();

esphome/components/cse7761/cse7761.h

@@ -28,7 +28,6 @@ class CSE7761Component : public PollingComponent, public uart::UARTDevice {
   void set_current_2_sensor(sensor::Sensor *current_sensor_2) { current_sensor_2_ = current_sensor_2; }
   void setup() override;
   void dump_config() override;
-  float get_setup_priority() const override;
   void update() override;
 
  protected:

esphome/components/cse7766/cse7766.cpp

@@ -37,7 +37,6 @@ void CSE7766Component::loop() {
     this->raw_data_index_ = (this->raw_data_index_ + 1) % 24;
   }
 }
-float CSE7766Component::get_setup_priority() const { return setup_priority::DATA; }
 
 bool CSE7766Component::check_byte_() {
   uint8_t index = this->raw_data_index_;
@@ -152,6 +151,10 @@ void CSE7766Component::parse_data_() {
     if (this->power_sensor_ != nullptr) {
       this->power_sensor_->publish_state(power);
     }
+  } else if (this->power_sensor_ != nullptr) {
+    // No valid power measurement from chip - publish 0W to avoid stale readings
+    // This typically happens when current is below the measurable threshold (~50mA)
+    this->power_sensor_->publish_state(0.0f);
   }
 
   float current = 0.0f;

esphome/components/cse7766/cse7766.h

@@ -23,7 +23,6 @@ class CSE7766Component : public Component, public uart::UARTDevice {
   void set_power_factor_sensor(sensor::Sensor *power_factor_sensor) { power_factor_sensor_ = power_factor_sensor; }
 
   void loop() override;
-  float get_setup_priority() const override;
   void dump_config() override;
 
  protected:

esphome/components/current_based/current_based_cover.cpp

@@ -66,7 +66,7 @@ void CurrentBasedCover::loop() {
   if (this->current_operation == COVER_OPERATION_OPENING) {
     if (this->malfunction_detection_ && this->is_closing_()) {  // Malfunction
       this->direction_idle_();
-      this->malfunction_trigger_->trigger();
+      this->malfunction_trigger_.trigger();
       ESP_LOGI(TAG, "'%s' - Malfunction detected during opening. Current flow detected in close circuit",
                this->name_.c_str());
     } else if (this->is_opening_blocked_()) {  // Blocked
@@ -87,7 +87,7 @@ void CurrentBasedCover::loop() {
   } else if (this->current_operation == COVER_OPERATION_CLOSING) {
     if (this->malfunction_detection_ && this->is_opening_()) {  // Malfunction
       this->direction_idle_();
-      this->malfunction_trigger_->trigger();
+      this->malfunction_trigger_.trigger();
       ESP_LOGI(TAG, "'%s' - Malfunction detected during closing. Current flow detected in open circuit",
                this->name_.c_str());
     } else if (this->is_closing_blocked_()) {  // Blocked
@@ -159,7 +159,6 @@ void CurrentBasedCover::dump_config() {
                 this->start_sensing_delay_ / 1e3f, YESNO(this->malfunction_detection_));
 }
 
-float CurrentBasedCover::get_setup_priority() const { return setup_priority::DATA; }
 void CurrentBasedCover::stop_prev_trigger_() {
   if (this->prev_command_trigger_ != nullptr) {
     this->prev_command_trigger_->stop_action();
@@ -221,15 +220,15 @@ void CurrentBasedCover::start_direction_(CoverOperation dir) {
   Trigger<> *trig;
   switch (dir) {
     case COVER_OPERATION_IDLE:
-      trig = this->stop_trigger_;
+      trig = &this->stop_trigger_;
       break;
     case COVER_OPERATION_OPENING:
       this->last_operation_ = dir;
-      trig = this->open_trigger_;
+      trig = &this->open_trigger_;
       break;
     case COVER_OPERATION_CLOSING:
       this->last_operation_ = dir;
-      trig = this->close_trigger_;
+      trig = &this->close_trigger_;
       break;
     default:
       return;

esphome/components/current_based/current_based_cover.h

@@ -14,11 +14,10 @@ class CurrentBasedCover : public cover::Cover, public Component {
   void setup() override;
   void loop() override;
   void dump_config() override;
-  float get_setup_priority() const override;
 
-  Trigger<> *get_stop_trigger() const { return this->stop_trigger_; }
+  Trigger<> *get_stop_trigger() { return &this->stop_trigger_; }
 
-  Trigger<> *get_open_trigger() const { return this->open_trigger_; }
+  Trigger<> *get_open_trigger() { return &this->open_trigger_; }
   void set_open_sensor(sensor::Sensor *open_sensor) { this->open_sensor_ = open_sensor; }
   void set_open_moving_current_threshold(float open_moving_current_threshold) {
     this->open_moving_current_threshold_ = open_moving_current_threshold;
@@ -28,7 +27,7 @@ class CurrentBasedCover : public cover::Cover, public Component {
   }
   void set_open_duration(uint32_t open_duration) { this->open_duration_ = open_duration; }
 
-  Trigger<> *get_close_trigger() const { return this->close_trigger_; }
+  Trigger<> *get_close_trigger() { return &this->close_trigger_; }
   void set_close_sensor(sensor::Sensor *close_sensor) { this->close_sensor_ = close_sensor; }
   void set_close_moving_current_threshold(float close_moving_current_threshold) {
     this->close_moving_current_threshold_ = close_moving_current_threshold;
@@ -44,7 +43,7 @@ class CurrentBasedCover : public cover::Cover, public Component {
   void set_malfunction_detection(bool malfunction_detection) { this->malfunction_detection_ = malfunction_detection; }
   void set_start_sensing_delay(uint32_t start_sensing_delay) { this->start_sensing_delay_ = start_sensing_delay; }
 
-  Trigger<> *get_malfunction_trigger() const { return this->malfunction_trigger_; }
+  Trigger<> *get_malfunction_trigger() { return &this->malfunction_trigger_; }
 
   cover::CoverTraits get_traits() override;
 
@@ -64,23 +63,23 @@ class CurrentBasedCover : public cover::Cover, public Component {
 
   void recompute_position_();
 
-  Trigger<> *stop_trigger_{new Trigger<>()};
+  Trigger<> stop_trigger_;
 
   sensor::Sensor *open_sensor_{nullptr};
-  Trigger<> *open_trigger_{new Trigger<>()};
+  Trigger<> open_trigger_;
   float open_moving_current_threshold_;
   float open_obstacle_current_threshold_{FLT_MAX};
   uint32_t open_duration_;
 
   sensor::Sensor *close_sensor_{nullptr};
-  Trigger<> *close_trigger_{new Trigger<>()};
+  Trigger<> close_trigger_;
   float close_moving_current_threshold_;
   float close_obstacle_current_threshold_{FLT_MAX};
   uint32_t close_duration_;
 
   uint32_t max_duration_{UINT32_MAX};
   bool malfunction_detection_{true};
-  Trigger<> *malfunction_trigger_{new Trigger<>()};
+  Trigger<> malfunction_trigger_;
   uint32_t start_sensing_delay_;
   float obstacle_rollback_;
 

esphome/components/daly_bms/daly_bms.cpp

@@ -104,8 +104,6 @@ void DalyBmsComponent::loop() {
   }
 }
 
-float DalyBmsComponent::get_setup_priority() const { return setup_priority::DATA; }
-
 void DalyBmsComponent::request_data_(uint8_t data_id) {
   uint8_t request_message[DALY_FRAME_SIZE];
 

esphome/components/daly_bms/daly_bms.h

@@ -72,7 +72,6 @@ class DalyBmsComponent : public PollingComponent, public uart::UARTDevice {
   void update() override;
   void loop() override;
 
-  float get_setup_priority() const override;
   void set_address(uint8_t address) { this->addr_ = address; }
 
  protected:

esphome/components/daly_bms/sensor.py

@@ -1,5 +1,6 @@
 import esphome.codegen as cg
 from esphome.components import sensor
+from esphome.components.const import ICON_CURRENT_DC, UNIT_AMPERE_HOUR
 import esphome.config_validation as cv
 from esphome.const import (
     CONF_BATTERY_LEVEL,
@@ -55,14 +56,11 @@ CONF_CELL_15_VOLTAGE = "cell_15_voltage"
 CONF_CELL_16_VOLTAGE = "cell_16_voltage"
 CONF_CELL_17_VOLTAGE = "cell_17_voltage"
 CONF_CELL_18_VOLTAGE = "cell_18_voltage"
-ICON_CURRENT_DC = "mdi:current-dc"
 ICON_BATTERY_OUTLINE = "mdi:battery-outline"
 ICON_THERMOMETER_CHEVRON_UP = "mdi:thermometer-chevron-up"
 ICON_THERMOMETER_CHEVRON_DOWN = "mdi:thermometer-chevron-down"
 ICON_CAR_BATTERY = "mdi:car-battery"
 
-UNIT_AMPERE_HOUR = "Ah"
-
 TYPES = [
     CONF_VOLTAGE,
     CONF_CURRENT,

esphome/components/dht/dht.cpp

@@ -63,8 +63,6 @@ void DHT::update() {
   }
 }
 
-float DHT::get_setup_priority() const { return setup_priority::DATA; }
-
 void DHT::set_dht_model(DHTModel model) {
   this->model_ = model;
   this->is_auto_detect_ = model == DHT_MODEL_AUTO_DETECT;

esphome/components/dht/dht.h

@@ -51,8 +51,6 @@ class DHT : public PollingComponent {
   void dump_config() override;
   /// Update sensor values and push them to the frontend.
   void update() override;
-  /// HARDWARE_LATE setup priority.
-  float get_setup_priority() const override;
 
  protected:
   bool read_sensor_(float *temperature, float *humidity, bool report_errors);

esphome/components/dht12/dht12.cpp

@@ -49,7 +49,7 @@ void DHT12Component::dump_config() {
   LOG_SENSOR("  ", "Temperature", this->temperature_sensor_);
   LOG_SENSOR("  ", "Humidity", this->humidity_sensor_);
 }
-float DHT12Component::get_setup_priority() const { return setup_priority::DATA; }
+
 bool DHT12Component::read_data_(uint8_t *data) {
   if (!this->read_bytes(0, data, 5)) {
     ESP_LOGW(TAG, "Updating DHT12 failed!");

esphome/components/dht12/dht12.h

@@ -11,7 +11,6 @@ class DHT12Component : public PollingComponent, public i2c::I2CDevice {
  public:
   void setup() override;
   void dump_config() override;
-  float get_setup_priority() const override;
   void update() override;
 
   void set_temperature_sensor(sensor::Sensor *temperature_sensor) { temperature_sensor_ = temperature_sensor; }

esphome/components/display/__init__.py

@@ -15,7 +15,7 @@ from esphome.const import (
     CONF_UPDATE_INTERVAL,
     SCHEDULER_DONT_RUN,
 )
-from esphome.core import CoroPriority, coroutine_with_priority
+from esphome.core import CORE, CoroPriority, coroutine_with_priority
 
 IS_PLATFORM_COMPONENT = True
 
@@ -222,3 +222,8 @@ async def display_is_displaying_page_to_code(config, condition_id, template_arg,
 async def to_code(config):
     cg.add_global(display_ns.using)
     cg.add_define("USE_DISPLAY")
+    if CORE.is_esp32:
+        # Re-enable ESP-IDF's LCD driver (excluded by default to save compile time)
+        from esphome.components.esp32 import include_builtin_idf_component
+
+        include_builtin_idf_component("esp_lcd")

esphome/components/dlms_meter/__init__.py

@@ -0,0 +1,57 @@
+import esphome.codegen as cg
+from esphome.components import uart
+import esphome.config_validation as cv
+from esphome.const import CONF_ID, PLATFORM_ESP32, PLATFORM_ESP8266
+
+CODEOWNERS = ["@SimonFischer04"]
+DEPENDENCIES = ["uart"]
+
+CONF_DLMS_METER_ID = "dlms_meter_id"
+CONF_DECRYPTION_KEY = "decryption_key"
+CONF_PROVIDER = "provider"
+
+PROVIDERS = {"generic": 0, "netznoe": 1}
+
+dlms_meter_component_ns = cg.esphome_ns.namespace("dlms_meter")
+DlmsMeterComponent = dlms_meter_component_ns.class_(
+    "DlmsMeterComponent", cg.Component, uart.UARTDevice
+)
+
+
+def validate_key(value):
+    value = cv.string_strict(value)
+    if len(value) != 32:
+        raise cv.Invalid("Decryption key must be 32 hex characters (16 bytes)")
+    try:
+        return [int(value[i : i + 2], 16) for i in range(0, 32, 2)]
+    except ValueError as exc:
+        raise cv.Invalid("Decryption key must be hex values from 00 to FF") from exc
+
+
+CONFIG_SCHEMA = cv.All(
+    cv.Schema(
+        {
+            cv.GenerateID(): cv.declare_id(DlmsMeterComponent),
+            cv.Required(CONF_DECRYPTION_KEY): validate_key,
+            cv.Optional(CONF_PROVIDER, default="generic"): cv.enum(
+                PROVIDERS, lower=True
+            ),
+        }
+    )
+    .extend(uart.UART_DEVICE_SCHEMA)
+    .extend(cv.COMPONENT_SCHEMA),
+    cv.only_on([PLATFORM_ESP8266, PLATFORM_ESP32]),
+)
+
+FINAL_VALIDATE_SCHEMA = uart.final_validate_device_schema(
+    "dlms_meter", baud_rate=2400, require_rx=True
+)
+
+
+async def to_code(config):
+    var = cg.new_Pvariable(config[CONF_ID])
+    await cg.register_component(var, config)
+    await uart.register_uart_device(var, config)
+    key = ", ".join(str(b) for b in config[CONF_DECRYPTION_KEY])
+    cg.add(var.set_decryption_key(cg.RawExpression(f"{{{key}}}")))
+    cg.add(var.set_provider(PROVIDERS[config[CONF_PROVIDER]]))

esphome/components/dlms_meter/dlms.h

@@ -0,0 +1,71 @@
+#pragma once
+
+#include <cstdint>
+
+namespace esphome::dlms_meter {
+
+/*
++-------------------------------+
+|       Ciphering Service       |
++-------------------------------+
+|      System Title Length      |
++-------------------------------+
+|                               |
+|                               |
+|                               |
+|            System             |
+|            Title              |
+|                               |
+|                               |
+|                               |
++-------------------------------+
+|            Length             | (1 or 3 Bytes)
++-------------------------------+
+|     Security Control Byte     |
++-------------------------------+
+|                               |
+|             Frame             |
+|            Counter            |
+|                               |
++-------------------------------+
+|                               |
+~                               ~
+        Encrypted Payload
+~                               ~
+|                               |
++-------------------------------+
+
+Ciphering Service: 0xDB (General-Glo-Ciphering)
+System Title Length: 0x08
+System Title: Unique ID of meter
+Length: 1 Byte=Length <= 127, 3 Bytes=Length > 127 (0x82 & 2 Bytes length)
+Security Control Byte:
+- Bit 3…0: Security_Suite_Id
+- Bit 4: "A" subfield: indicates that authentication is applied
+- Bit 5: "E" subfield: indicates that encryption is applied
+- Bit 6: Key_Set subfield: 0 = Unicast, 1 = Broadcast
+- Bit 7: Indicates the use of compression.
+ */
+
+static constexpr uint8_t DLMS_HEADER_LENGTH = 16;
+static constexpr uint8_t DLMS_HEADER_EXT_OFFSET = 2;  // Extra offset for extended length header
+static constexpr uint8_t DLMS_CIPHER_OFFSET = 0;
+static constexpr uint8_t DLMS_SYST_OFFSET = 1;
+static constexpr uint8_t DLMS_LENGTH_OFFSET = 10;
+static constexpr uint8_t TWO_BYTE_LENGTH = 0x82;
+static constexpr uint8_t DLMS_LENGTH_CORRECTION = 5;  // Header bytes included in length field
+static constexpr uint8_t DLMS_SECBYTE_OFFSET = 11;
+static constexpr uint8_t DLMS_FRAMECOUNTER_OFFSET = 12;
+static constexpr uint8_t DLMS_FRAMECOUNTER_LENGTH = 4;
+static constexpr uint8_t DLMS_PAYLOAD_OFFSET = 16;
+static constexpr uint8_t GLO_CIPHERING = 0xDB;
+static constexpr uint8_t DATA_NOTIFICATION = 0x0F;
+static constexpr uint8_t TIMESTAMP_DATETIME = 0x0C;
+static constexpr uint16_t MAX_MESSAGE_LENGTH = 512;  // Maximum size of message (when having 2 bytes length in header).
+
+// Provider specific quirks
+static constexpr uint8_t NETZ_NOE_MAGIC_BYTE = 0x81;  // Magic length byte used by Netz NOE
+static constexpr uint8_t NETZ_NOE_EXPECTED_MESSAGE_LENGTH = 0xF8;
+static constexpr uint8_t NETZ_NOE_EXPECTED_SECURITY_CONTROL_BYTE = 0x20;
+
+}  // namespace esphome::dlms_meter