From 4fc4da6ed2d69d9cdb47d777abc24e0e5e0c29c4 Mon Sep 17 00:00:00 2001
From: "J. Nick Koston" <nick@koston.org>
Date: Sun, 16 Nov 2025 07:35:31 -0600
Subject: [PATCH 01/23] [analyze-memory] Show all core symbols > 100 B instead
 of top 15 (#11909)

---
 esphome/analyze_memory/cli.py | 26 ++++++++++++++++++++------
 1 file changed, 20 insertions(+), 6 deletions(-)

diff --git a/esphome/analyze_memory/cli.py b/esphome/analyze_memory/cli.py
index 718f42330d..44ade221f8 100644
--- a/esphome/analyze_memory/cli.py
+++ b/esphome/analyze_memory/cli.py
@@ -15,6 +15,11 @@ from . import (
 class MemoryAnalyzerCLI(MemoryAnalyzer):
     """Memory analyzer with CLI-specific report generation."""
 
+    # Symbol size threshold for detailed analysis
+    SYMBOL_SIZE_THRESHOLD: int = (
+        100  # Show symbols larger than this in detailed analysis
+    )
+
     # Column width constants
     COL_COMPONENT: int = 29
     COL_FLASH_TEXT: int = 14
@@ -191,14 +196,21 @@ class MemoryAnalyzerCLI(MemoryAnalyzer):
                     f"{len(symbols):>{self.COL_CORE_COUNT}} | {percentage:>{self.COL_CORE_PERCENT - 1}.1f}%"
                 )
 
-            # Top 15 largest core symbols
+            # All core symbols above threshold
             lines.append("")
-            lines.append(f"Top 15 Largest {_COMPONENT_CORE} Symbols:")
             sorted_core_symbols = sorted(
                 self._esphome_core_symbols, key=lambda x: x[2], reverse=True
             )
+            large_core_symbols = [
+                (symbol, demangled, size)
+                for symbol, demangled, size in sorted_core_symbols
+                if size > self.SYMBOL_SIZE_THRESHOLD
+            ]
 
-            for i, (symbol, demangled, size) in enumerate(sorted_core_symbols[:15]):
+            lines.append(
+                f"{_COMPONENT_CORE} Symbols > {self.SYMBOL_SIZE_THRESHOLD} B ({len(large_core_symbols)} symbols):"
+            )
+            for i, (symbol, demangled, size) in enumerate(large_core_symbols):
                 lines.append(f"{i + 1}. {demangled} ({size:,} B)")
 
             lines.append("=" * self.TABLE_WIDTH)
@@ -268,13 +280,15 @@ class MemoryAnalyzerCLI(MemoryAnalyzer):
                 lines.append(f"Total size: {comp_mem.flash_total:,} B")
                 lines.append("")
 
-                # Show all symbols > 100 bytes for better visibility
+                # Show all symbols above threshold for better visibility
                 large_symbols = [
-                    (sym, dem, size) for sym, dem, size in sorted_symbols if size > 100
+                    (sym, dem, size)
+                    for sym, dem, size in sorted_symbols
+                    if size > self.SYMBOL_SIZE_THRESHOLD
                 ]
 
                 lines.append(
-                    f"{comp_name} Symbols > 100 B ({len(large_symbols)} symbols):"
+                    f"{comp_name} Symbols > {self.SYMBOL_SIZE_THRESHOLD} B ({len(large_symbols)} symbols):"
                 )
                 for i, (symbol, demangled, size) in enumerate(large_symbols):
                     lines.append(f"{i + 1}. {demangled} ({size:,} B)")

From 320120883cab070fa21ba187e13f0f3c6447c3b8 Mon Sep 17 00:00:00 2001
From: Clyde Stubbs <2366188+clydebarrow@users.noreply.github.com>
Date: Mon, 17 Nov 2025 07:47:54 +1000
Subject: [PATCH 02/23] [lvgl] Migrate lv_font creation into Font class and
 optimise (#11915)

---
 esphome/components/font/__init__.py      |   2 +
 esphome/components/font/font.cpp         | 263 ++++++++++++++++-------
 esphome/components/font/font.h           |  33 +--
 esphome/components/lvgl/__init__.py      |  14 +-
 esphome/components/lvgl/font.cpp         |  76 -------
 esphome/components/lvgl/lv_validation.py |   5 +-
 esphome/components/lvgl/lvgl_esphome.h   |  26 +--
 esphome/components/lvgl/types.py         |   1 -
 tests/components/lvgl/lvgl-package.yaml  |   4 +-
 tests/components/lvgl/test.host.yaml     |   6 +
 10 files changed, 232 insertions(+), 198 deletions(-)
 delete mode 100644 esphome/components/lvgl/font.cpp

diff --git a/esphome/components/font/__init__.py b/esphome/components/font/__init__.py
index 32e803f405..2667dbdbdf 100644
--- a/esphome/components/font/__init__.py
+++ b/esphome/components/font/__init__.py
@@ -486,6 +486,8 @@ class GlyphInfo:
 
 
 def glyph_to_glyphinfo(glyph, font, size, bpp):
+    # Convert to 32 bit unicode codepoint
+    glyph = ord(glyph)
     scale = 256 // (1 << bpp)
     if not font.is_scalable:
         sizes = [pt_to_px(x.size) for x in font.available_sizes]
diff --git a/esphome/components/font/font.cpp b/esphome/components/font/font.cpp
index add403fe98..5e3bf1dd20 100644
--- a/esphome/components/font/font.cpp
+++ b/esphome/components/font/font.cpp
@@ -6,42 +6,147 @@
 
 namespace esphome {
 namespace font {
-
 static const char *const TAG = "font";
 
-// Compare the char at the string position with this char.
-// Return true if this char is less than or equal the other.
-bool Glyph::compare_to(const uint8_t *str) const {
-  // 1 -> this->char_
-  // 2 -> str
-  for (uint32_t i = 0;; i++) {
-    if (this->a_char[i] == '\0')
-      return true;
-    if (str[i] == '\0')
-      return false;
-    if (this->a_char[i] > str[i])
-      return false;
-    if (this->a_char[i] < str[i])
-      return true;
+#ifdef USE_LVGL_FONT
+const uint8_t *Font::get_glyph_bitmap(const lv_font_t *font, uint32_t unicode_letter) {
+  auto *fe = (Font *) font->dsc;
+  const auto *gd = fe->get_glyph_data_(unicode_letter);
+  if (gd == nullptr) {
+    return nullptr;
   }
-  // this should not happen
-  return false;
+  return gd->data;
 }
-int Glyph::match_length(const uint8_t *str) const {
-  for (uint32_t i = 0;; i++) {
-    if (this->a_char[i] == '\0')
-      return i;
-    if (str[i] != this->a_char[i])
+
+bool Font::get_glyph_dsc_cb(const lv_font_t *font, lv_font_glyph_dsc_t *dsc, uint32_t unicode_letter, uint32_t next) {
+  auto *fe = (Font *) font->dsc;
+  const auto *gd = fe->get_glyph_data_(unicode_letter);
+  if (gd == nullptr) {
+    return false;
+  }
+  dsc->adv_w = gd->advance;
+  dsc->ofs_x = gd->offset_x;
+  dsc->ofs_y = fe->height_ - gd->height - gd->offset_y - fe->lv_font_.base_line;
+  dsc->box_w = gd->width;
+  dsc->box_h = gd->height;
+  dsc->is_placeholder = 0;
+  dsc->bpp = fe->get_bpp();
+  return true;
+}
+
+const Glyph *Font::get_glyph_data_(uint32_t unicode_letter) {
+  if (unicode_letter == this->last_letter_ && this->last_letter_ != 0)
+    return this->last_data_;
+  auto *glyph = this->find_glyph(unicode_letter);
+  if (glyph == nullptr) {
+    return nullptr;
+  }
+  this->last_data_ = glyph;
+  this->last_letter_ = unicode_letter;
+  return glyph;
+}
+#endif
+
+/**
+ *  Attempt to extract a 32 bit Unicode codepoint from a UTF-8 string.
+ *  If successful, return the codepoint and set the length to the number of bytes read.
+ *  If the end of the string has been reached and a valid codepoint has not been found, return 0 and set the length to
+ * 0.
+ *
+ * @param utf8_str The input string
+ * @param length Pointer to length storage
+ * @return The extracted code point
+ */
+static uint32_t extract_unicode_codepoint(const char *utf8_str, size_t *length) {
+  // Safely cast to uint8_t* for correct bitwise operations on bytes
+  const uint8_t *current = reinterpret_cast<const uint8_t *>(utf8_str);
+  uint32_t code_point = 0;
+  uint8_t c1 = *current++;
+
+  // check for end of string
+  if (c1 == 0) {
+    *length = 0;
+    return 0;
+  }
+
+  // --- 1-Byte Sequence: 0xxxxxxx (ASCII) ---
+  if (c1 < 0x80) {
+    // Valid ASCII byte.
+    code_point = c1;
+    // Optimization: No need to check for continuation bytes.
+  }
+  // --- 2-Byte Sequence: 110xxxxx 10xxxxxx ---
+  else if ((c1 & 0xE0) == 0xC0) {
+    uint8_t c2 = *current++;
+
+    // Error Check 1: Check if c2 is a valid continuation byte (10xxxxxx)
+    if ((c2 & 0xC0) != 0x80) {
+      *length = 0;
       return 0;
+    }
+
+    code_point = (c1 & 0x1F) << 6;
+    code_point |= (c2 & 0x3F);
+
+    // Error Check 2: Overlong check (2-byte must be > 0x7F)
+    if (code_point <= 0x7F) {
+      *length = 0;
+      return 0;
+    }
   }
-  // this should not happen
-  return 0;
-}
-void Glyph::scan_area(int *x1, int *y1, int *width, int *height) const {
-  *x1 = this->offset_x;
-  *y1 = this->offset_y;
-  *width = this->width;
-  *height = this->height;
+  // --- 3-Byte Sequence: 1110xxxx 10xxxxxx 10xxxxxx ---
+  else if ((c1 & 0xF0) == 0xE0) {
+    uint8_t c2 = *current++;
+    uint8_t c3 = *current++;
+
+    // Error Check 1: Check continuation bytes
+    if (((c2 & 0xC0) != 0x80) || ((c3 & 0xC0) != 0x80)) {
+      *length = 0;
+      return 0;
+    }
+
+    code_point = (c1 & 0x0F) << 12;
+    code_point |= (c2 & 0x3F) << 6;
+    code_point |= (c3 & 0x3F);
+
+    // Error Check 2: Overlong check (3-byte must be > 0x7FF)
+    // Also check for surrogates (0xD800-0xDFFF)
+    if (code_point <= 0x7FF || (code_point >= 0xD800 && code_point <= 0xDFFF)) {
+      *length = 0;
+      return 0;
+    }
+  }
+  // --- 4-Byte Sequence: 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx ---
+  else if ((c1 & 0xF8) == 0xF0) {
+    uint8_t c2 = *current++;
+    uint8_t c3 = *current++;
+    uint8_t c4 = *current++;
+
+    // Error Check 1: Check continuation bytes
+    if (((c2 & 0xC0) != 0x80) || ((c3 & 0xC0) != 0x80) || ((c4 & 0xC0) != 0x80)) {
+      *length = 0;
+      return 0;
+    }
+
+    code_point = (c1 & 0x07) << 18;
+    code_point |= (c2 & 0x3F) << 12;
+    code_point |= (c3 & 0x3F) << 6;
+    code_point |= (c4 & 0x3F);
+
+    // Error Check 2: Overlong check (4-byte must be > 0xFFFF)
+    // Also check for valid Unicode range (must be <= 0x10FFFF)
+    if (code_point <= 0xFFFF || code_point > 0x10FFFF) {
+      *length = 0;
+      return 0;
+    }
+  }
+  // --- Invalid leading byte (e.g., 10xxxxxx or 11111xxx) ---
+  else {
+    *length = 0;
+    return 0;
+  }
+  *length = current - reinterpret_cast<const uint8_t *>(utf8_str);
+  return code_point;
 }
 
 Font::Font(const Glyph *data, int data_nr, int baseline, int height, int descender, int xheight, int capheight,
@@ -53,82 +158,93 @@ Font::Font(const Glyph *data, int data_nr, int baseline, int height, int descend
       linegap_(height - baseline - descender),
       xheight_(xheight),
       capheight_(capheight),
-      bpp_(bpp) {}
-int Font::match_next_glyph(const uint8_t *str, int *match_length) const {
+      bpp_(bpp) {
+#ifdef USE_LVGL_FONT
+  this->lv_font_.dsc = this;
+  this->lv_font_.line_height = this->get_height();
+  this->lv_font_.base_line = this->lv_font_.line_height - this->get_baseline();
+  this->lv_font_.get_glyph_dsc = get_glyph_dsc_cb;
+  this->lv_font_.get_glyph_bitmap = get_glyph_bitmap;
+  this->lv_font_.subpx = LV_FONT_SUBPX_NONE;
+  this->lv_font_.underline_position = -1;
+  this->lv_font_.underline_thickness = 1;
+#endif
+}
+
+const Glyph *Font::find_glyph(uint32_t codepoint) const {
   int lo = 0;
   int hi = this->glyphs_.size() - 1;
   while (lo != hi) {
     int mid = (lo + hi + 1) / 2;
-    if (this->glyphs_[mid].compare_to(str)) {
+    if (this->glyphs_[mid].is_less_or_equal(codepoint)) {
       lo = mid;
     } else {
       hi = mid - 1;
     }
   }
-  *match_length = this->glyphs_[lo].match_length(str);
-  if (*match_length <= 0)
-    return -1;
-  return lo;
+  auto *result = &this->glyphs_[lo];
+  if (result->code_point == codepoint)
+    return result;
+  return nullptr;
 }
+
 #ifdef USE_DISPLAY
 void Font::measure(const char *str, int *width, int *x_offset, int *baseline, int *height) {
   *baseline = this->baseline_;
   *height = this->height_;
-  int i = 0;
   int min_x = 0;
   bool has_char = false;
   int x = 0;
-  while (str[i] != '\0') {
-    int match_length;
-    int glyph_n = this->match_next_glyph((const uint8_t *) str + i, &match_length);
-    if (glyph_n < 0) {
+  for (;;) {
+    size_t length;
+    auto code_point = extract_unicode_codepoint(str, &length);
+    if (length == 0)
+      break;
+    str += length;
+    auto *glyph = this->find_glyph(code_point);
+    if (glyph == nullptr) {
       // Unknown char, skip
-      if (!this->get_glyphs().empty())
-        x += this->get_glyphs()[0].advance;
-      i++;
+      if (!this->glyphs_.empty())
+        x += this->glyphs_[0].advance;
       continue;
     }
 
-    const Glyph &glyph = this->glyphs_[glyph_n];
     if (!has_char) {
-      min_x = glyph.offset_x;
+      min_x = glyph->offset_x;
     } else {
-      min_x = std::min(min_x, x + glyph.offset_x);
+      min_x = std::min(min_x, x + glyph->offset_x);
     }
-    x += glyph.advance;
+    x += glyph->advance;
 
-    i += match_length;
     has_char = true;
   }
   *x_offset = min_x;
   *width = x - min_x;
 }
+
 void Font::print(int x_start, int y_start, display::Display *display, Color color, const char *text, Color background) {
-  int i = 0;
   int x_at = x_start;
-  int scan_x1, scan_y1, scan_width, scan_height;
-  while (text[i] != '\0') {
-    int match_length;
-    int glyph_n = this->match_next_glyph((const uint8_t *) text + i, &match_length);
-    if (glyph_n < 0) {
+  for (;;) {
+    size_t length;
+    auto code_point = extract_unicode_codepoint(text, &length);
+    if (length == 0)
+      break;
+    text += length;
+    auto *glyph = this->find_glyph(code_point);
+    if (glyph == nullptr) {
       // Unknown char, skip
-      ESP_LOGW(TAG, "Encountered character without representation in font: '%c'", text[i]);
-      if (!this->get_glyphs().empty()) {
-        uint8_t glyph_width = this->get_glyphs()[0].advance;
-        display->filled_rectangle(x_at, y_start, glyph_width, this->height_, color);
+      ESP_LOGW(TAG, "Codepoint 0x%08" PRIx32 " not found in font", code_point);
+      if (!this->glyphs_.empty()) {
+        uint8_t glyph_width = this->glyphs_[0].advance;
+        display->rectangle(x_at, y_start, glyph_width, this->height_, color);
         x_at += glyph_width;
       }
-
-      i++;
       continue;
     }
 
-    const Glyph &glyph = this->get_glyphs()[glyph_n];
-    glyph.scan_area(&scan_x1, &scan_y1, &scan_width, &scan_height);
-
-    const uint8_t *data = glyph.data;
-    const int max_x = x_at + scan_x1 + scan_width;
-    const int max_y = y_start + scan_y1 + scan_height;
+    const uint8_t *data = glyph->data;
+    const int max_x = x_at + glyph->offset_x + glyph->width;
+    const int max_y = y_start + glyph->offset_y + glyph->height;
 
     uint8_t bitmask = 0;
     uint8_t pixel_data = 0;
@@ -141,10 +257,10 @@ void Font::print(int x_start, int y_start, display::Display *display, Color colo
     auto b_g = (float) background.g;
     auto b_b = (float) background.b;
     auto b_w = (float) background.w;
-    for (int glyph_y = y_start + scan_y1; glyph_y != max_y; glyph_y++) {
-      for (int glyph_x = x_at + scan_x1; glyph_x != max_x; glyph_x++) {
+    for (int glyph_y = y_start + glyph->offset_y; glyph_y != max_y; glyph_y++) {
+      for (int glyph_x = x_at + glyph->offset_x; glyph_x != max_x; glyph_x++) {
         uint8_t pixel = 0;
-        for (int bit_num = 0; bit_num != this->bpp_; bit_num++) {
+        for (uint8_t bit_num = 0; bit_num != this->bpp_; bit_num++) {
           if (bitmask == 0) {
             pixel_data = progmem_read_byte(data++);
             bitmask = 0x80;
@@ -164,12 +280,9 @@ void Font::print(int x_start, int y_start, display::Display *display, Color colo
         }
       }
     }
-    x_at += glyph.advance;
-
-    i += match_length;
+    x_at += glyph->advance;
   }
 }
 #endif
-
 }  // namespace font
 }  // namespace esphome
diff --git a/esphome/components/font/font.h b/esphome/components/font/font.h
index cb6cc89137..262ded3be4 100644
--- a/esphome/components/font/font.h
+++ b/esphome/components/font/font.h
@@ -6,6 +6,9 @@
 #ifdef USE_DISPLAY
 #include "esphome/components/display/display.h"
 #endif
+#ifdef USE_LVGL_FONT
+#include <lvgl.h>
+#endif
 
 namespace esphome {
 namespace font {
@@ -14,9 +17,9 @@ class Font;
 
 class Glyph {
  public:
-  constexpr Glyph(const char *a_char, const uint8_t *data, int advance, int offset_x, int offset_y, int width,
+  constexpr Glyph(uint32_t code_point, const uint8_t *data, int advance, int offset_x, int offset_y, int width,
                   int height)
-      : a_char(a_char),
+      : code_point(code_point),
         data(data),
         advance(advance),
         offset_x(offset_x),
@@ -24,24 +27,15 @@ class Glyph {
         width(width),
         height(height) {}
 
-  const uint8_t *get_char() const { return reinterpret_cast<const uint8_t *>(this->a_char); }
+  bool is_less_or_equal(uint32_t other) const { return this->code_point <= other; }
 
-  bool compare_to(const uint8_t *str) const;
-
-  int match_length(const uint8_t *str) const;
-
-  void scan_area(int *x1, int *y1, int *width, int *height) const;
-
-  const char *a_char;
+  const uint32_t code_point;
   const uint8_t *data;
   int advance;
   int offset_x;
   int offset_y;
   int width;
   int height;
-
- protected:
-  friend Font;
 };
 
 class Font
@@ -64,7 +58,7 @@ class Font
   Font(const Glyph *data, int data_nr, int baseline, int height, int descender, int xheight, int capheight,
        uint8_t bpp = 1);
 
-  int match_next_glyph(const uint8_t *str, int *match_length) const;
+  const Glyph *find_glyph(uint32_t codepoint) const;
 
 #ifdef USE_DISPLAY
   void print(int x_start, int y_start, display::Display *display, Color color, const char *text,
@@ -79,6 +73,9 @@ class Font
   inline int get_xheight() { return this->xheight_; }
   inline int get_capheight() { return this->capheight_; }
   inline int get_bpp() { return this->bpp_; }
+#ifdef USE_LVGL_FONT
+  const lv_font_t *get_lv_font() const { return &this->lv_font_; }
+#endif
 
   const ConstVector<Glyph> &get_glyphs() const { return glyphs_; }
 
@@ -91,6 +88,14 @@ class Font
   int xheight_;
   int capheight_;
   uint8_t bpp_;  // bits per pixel
+#ifdef USE_LVGL_FONT
+  lv_font_t lv_font_{};
+  static const uint8_t *get_glyph_bitmap(const lv_font_t *font, uint32_t unicode_letter);
+  static bool get_glyph_dsc_cb(const lv_font_t *font, lv_font_glyph_dsc_t *dsc, uint32_t unicode_letter, uint32_t next);
+  const Glyph *get_glyph_data_(uint32_t unicode_letter);
+  uint32_t last_letter_{};
+  const Glyph *last_data_{};
+#endif
 };
 
 }  // namespace font
diff --git a/esphome/components/lvgl/__init__.py b/esphome/components/lvgl/__init__.py
index 2a24f343c3..eaa37b54dd 100644
--- a/esphome/components/lvgl/__init__.py
+++ b/esphome/components/lvgl/__init__.py
@@ -52,15 +52,7 @@ from .schemas import (
 from .styles import add_top_layer, styles_to_code, theme_to_code
 from .touchscreens import touchscreen_schema, touchscreens_to_code
 from .trigger import add_on_boot_triggers, generate_triggers
-from .types import (
-    FontEngine,
-    IdleTrigger,
-    PlainTrigger,
-    lv_font_t,
-    lv_group_t,
-    lv_style_t,
-    lvgl_ns,
-)
+from .types import IdleTrigger, PlainTrigger, lv_font_t, lv_group_t, lv_style_t, lvgl_ns
 from .widgets import (
     LvScrActType,
     Widget,
@@ -244,7 +236,6 @@ async def to_code(configs):
     cg.add_global(lvgl_ns.using)
     for font in helpers.esphome_fonts_used:
         await cg.get_variable(font)
-        cg.new_Pvariable(ID(f"{font}_engine", True, type=FontEngine), MockObj(font))
     default_font = config_0[df.CONF_DEFAULT_FONT]
     if not lvalid.is_lv_font(default_font):
         add_define(
@@ -256,7 +247,8 @@ async def to_code(configs):
             type=lv_font_t.operator("ptr").operator("const"),
         )
         cg.new_variable(
-            globfont_id, MockObj(await lvalid.lv_font.process(default_font))
+            globfont_id,
+            MockObj(await lvalid.lv_font.process(default_font), "->").get_lv_font(),
         )
         add_define("LV_FONT_DEFAULT", df.DEFAULT_ESPHOME_FONT)
     else:
diff --git a/esphome/components/lvgl/font.cpp b/esphome/components/lvgl/font.cpp
deleted file mode 100644
index 1976fb9608..0000000000
--- a/esphome/components/lvgl/font.cpp
+++ /dev/null
@@ -1,76 +0,0 @@
-#include "lvgl_esphome.h"
-
-#ifdef USE_LVGL_FONT
-namespace esphome {
-namespace lvgl {
-
-static const uint8_t *get_glyph_bitmap(const lv_font_t *font, uint32_t unicode_letter) {
-  auto *fe = (FontEngine *) font->dsc;
-  const auto *gd = fe->get_glyph_data(unicode_letter);
-  if (gd == nullptr)
-    return nullptr;
-  // esph_log_d(TAG, "Returning bitmap @  %X", (uint32_t)gd->data);
-
-  return gd->data;
-}
-
-static bool get_glyph_dsc_cb(const lv_font_t *font, lv_font_glyph_dsc_t *dsc, uint32_t unicode_letter, uint32_t next) {
-  auto *fe = (FontEngine *) font->dsc;
-  const auto *gd = fe->get_glyph_data(unicode_letter);
-  if (gd == nullptr)
-    return false;
-  dsc->adv_w = gd->advance;
-  dsc->ofs_x = gd->offset_x;
-  dsc->ofs_y = fe->height - gd->height - gd->offset_y - fe->baseline;
-  dsc->box_w = gd->width;
-  dsc->box_h = gd->height;
-  dsc->is_placeholder = 0;
-  dsc->bpp = fe->bpp;
-  return true;
-}
-
-FontEngine::FontEngine(font::Font *esp_font) : font_(esp_font) {
-  this->bpp = esp_font->get_bpp();
-  this->lv_font_.dsc = this;
-  this->lv_font_.line_height = this->height = esp_font->get_height();
-  this->lv_font_.base_line = this->baseline = this->lv_font_.line_height - esp_font->get_baseline();
-  this->lv_font_.get_glyph_dsc = get_glyph_dsc_cb;
-  this->lv_font_.get_glyph_bitmap = get_glyph_bitmap;
-  this->lv_font_.subpx = LV_FONT_SUBPX_NONE;
-  this->lv_font_.underline_position = -1;
-  this->lv_font_.underline_thickness = 1;
-}
-
-const lv_font_t *FontEngine::get_lv_font() { return &this->lv_font_; }
-
-const font::Glyph *FontEngine::get_glyph_data(uint32_t unicode_letter) {
-  if (unicode_letter == last_letter_)
-    return this->last_data_;
-  uint8_t unicode[5];
-  memset(unicode, 0, sizeof unicode);
-  if (unicode_letter > 0xFFFF) {
-    unicode[0] = 0xF0 + ((unicode_letter >> 18) & 0x7);
-    unicode[1] = 0x80 + ((unicode_letter >> 12) & 0x3F);
-    unicode[2] = 0x80 + ((unicode_letter >> 6) & 0x3F);
-    unicode[3] = 0x80 + (unicode_letter & 0x3F);
-  } else if (unicode_letter > 0x7FF) {
-    unicode[0] = 0xE0 + ((unicode_letter >> 12) & 0xF);
-    unicode[1] = 0x80 + ((unicode_letter >> 6) & 0x3F);
-    unicode[2] = 0x80 + (unicode_letter & 0x3F);
-  } else if (unicode_letter > 0x7F) {
-    unicode[0] = 0xC0 + ((unicode_letter >> 6) & 0x1F);
-    unicode[1] = 0x80 + (unicode_letter & 0x3F);
-  } else {
-    unicode[0] = unicode_letter;
-  }
-  int match_length;
-  int glyph_n = this->font_->match_next_glyph(unicode, &match_length);
-  if (glyph_n < 0)
-    return nullptr;
-  this->last_data_ = &this->font_->get_glyphs()[glyph_n];
-  this->last_letter_ = unicode_letter;
-  return this->last_data_;
-}
-}  // namespace lvgl
-}  // namespace esphome
-#endif  // USES_LVGL_FONT
diff --git a/esphome/components/lvgl/lv_validation.py b/esphome/components/lvgl/lv_validation.py
index 045258555c..23c322c31f 100644
--- a/esphome/components/lvgl/lv_validation.py
+++ b/esphome/components/lvgl/lv_validation.py
@@ -493,6 +493,7 @@ class LvFont(LValidator):
                 return LV_FONTS
             if is_lv_font(value):
                 return lv_builtin_font(value)
+            add_lv_use("font")
             fontval = cv.use_id(Font)(value)
             esphome_fonts_used.add(fontval)
             return requires_component("font")(fontval)
@@ -502,7 +503,9 @@ class LvFont(LValidator):
     async def process(self, value, args=()):
         if is_lv_font(value):
             return literal(f"&lv_font_{value}")
-        return literal(f"{value}_engine->get_lv_font()")
+        if isinstance(value, str):
+            return literal(f"{value}")
+        return await super().process(value, args)
 
 
 lv_font = LvFont()
diff --git a/esphome/components/lvgl/lvgl_esphome.h b/esphome/components/lvgl/lvgl_esphome.h
index 196a0d1cb4..bd6f1fdb61 100644
--- a/esphome/components/lvgl/lvgl_esphome.h
+++ b/esphome/components/lvgl/lvgl_esphome.h
@@ -50,6 +50,14 @@ static const display::ColorBitness LV_BITNESS = display::ColorBitness::COLOR_BIT
 static const display::ColorBitness LV_BITNESS = display::ColorBitness::COLOR_BITNESS_332;
 #endif  // LV_COLOR_DEPTH
 
+#ifdef USE_LVGL_FONT
+inline void lv_obj_set_style_text_font(lv_obj_t *obj, const font::Font *font, lv_style_selector_t part) {
+  lv_obj_set_style_text_font(obj, font->get_lv_font(), part);
+}
+inline void lv_style_set_text_font(lv_style_t *style, const font::Font *font) {
+  lv_style_set_text_font(style, font->get_lv_font());
+}
+#endif
 #ifdef USE_LVGL_IMAGE
 // Shortcut / overload, so that the source of an image can easily be updated
 // from within a lambda.
@@ -134,24 +142,6 @@ template<typename... Ts> class ObjUpdateAction : public Action<Ts...> {
  protected:
   std::function<void(Ts...)> lamb_;
 };
-#ifdef USE_LVGL_FONT
-class FontEngine {
- public:
-  FontEngine(font::Font *esp_font);
-  const lv_font_t *get_lv_font();
-
-  const font::Glyph *get_glyph_data(uint32_t unicode_letter);
-  uint16_t baseline{};
-  uint16_t height{};
-  uint8_t bpp{};
-
- protected:
-  font::Font *font_{};
-  uint32_t last_letter_{};
-  const font::Glyph *last_data_{};
-  lv_font_t lv_font_{};
-};
-#endif  // USE_LVGL_FONT
 #ifdef USE_LVGL_ANIMIMG
 void lv_animimg_stop(lv_obj_t *obj);
 #endif  // USE_LVGL_ANIMIMG
diff --git a/esphome/components/lvgl/types.py b/esphome/components/lvgl/types.py
index 035320b6ac..b99c0ad5a3 100644
--- a/esphome/components/lvgl/types.py
+++ b/esphome/components/lvgl/types.py
@@ -45,7 +45,6 @@ lv_coord_t = cg.global_ns.namespace("lv_coord_t")
 lv_event_code_t = cg.global_ns.enum("lv_event_code_t")
 lv_indev_type_t = cg.global_ns.enum("lv_indev_type_t")
 lv_key_t = cg.global_ns.enum("lv_key_t")
-FontEngine = lvgl_ns.class_("FontEngine")
 PlainTrigger = esphome_ns.class_("Trigger<>", automation.Trigger.template())
 DrawEndTrigger = esphome_ns.class_(
     "Trigger<uint32_t, uint32_t>", automation.Trigger.template(cg.uint32, cg.uint32)
diff --git a/tests/components/lvgl/lvgl-package.yaml b/tests/components/lvgl/lvgl-package.yaml
index d7c342b16e..e42a813b40 100644
--- a/tests/components/lvgl/lvgl-package.yaml
+++ b/tests/components/lvgl/lvgl-package.yaml
@@ -76,7 +76,7 @@ lvgl:
       line_width: 8
       line_rounded: true
     - id: date_style
-      text_font: roboto10
+      text_font: !lambda return id(roboto10);
       align: center
       text_color: !lambda return color_id2;
       bg_opa: cover
@@ -267,7 +267,7 @@ lvgl:
               snprintf(buf, sizeof(buf), "Setup: %d", 42);
               return std::string(buf);
             align: top_mid
-            text_font: space16
+            text_font: !lambda return id(space16);
         - label:
             id: chip_info_label
             # Test complex setup lambda (real-world pattern)
diff --git a/tests/components/lvgl/test.host.yaml b/tests/components/lvgl/test.host.yaml
index 39d9a0ebf3..00a8cd8c01 100644
--- a/tests/components/lvgl/test.host.yaml
+++ b/tests/components/lvgl/test.host.yaml
@@ -18,6 +18,7 @@ touchscreen:
 
 lvgl:
   - id: lvgl_0
+    default_font: space16
     displays: sdl0
   - id: lvgl_1
     displays: sdl1
@@ -39,3 +40,8 @@ lvgl:
                 text: Click ME
           on_click:
             logger.log: Clicked
+
+font:
+  - file: "gfonts://Roboto"
+    id: space16
+    bpp: 4

From 986d3c8f137aad0a6097606fae49b98a22949258 Mon Sep 17 00:00:00 2001
From: "J. Nick Koston" <nick@koston.org>
Date: Sun, 16 Nov 2025 18:38:38 -0600
Subject: [PATCH 03/23] [sntp] Merge multiple instances to fix crash and
 undefined behavior (#11904)

---
 esphome/components/sntp/time.py               |  68 +++++
 tests/component_tests/sntp/__init__.py        |   1 +
 .../sntp/config/sntp_test.yaml                |  22 ++
 tests/component_tests/sntp/test_init.py       | 238 ++++++++++++++++++
 4 files changed, 329 insertions(+)
 create mode 100644 tests/component_tests/sntp/__init__.py
 create mode 100644 tests/component_tests/sntp/config/sntp_test.yaml
 create mode 100644 tests/component_tests/sntp/test_init.py

diff --git a/esphome/components/sntp/time.py b/esphome/components/sntp/time.py
index d27fc9991d..69a2436d3d 100644
--- a/esphome/components/sntp/time.py
+++ b/esphome/components/sntp/time.py
@@ -1,9 +1,14 @@
+import logging
+
 import esphome.codegen as cg
 from esphome.components import time as time_
+from esphome.config_helpers import merge_config
 import esphome.config_validation as cv
 from esphome.const import (
     CONF_ID,
+    CONF_PLATFORM,
     CONF_SERVERS,
+    CONF_TIME,
     PLATFORM_BK72XX,
     PLATFORM_ESP32,
     PLATFORM_ESP8266,
@@ -12,13 +17,74 @@ from esphome.const import (
     PLATFORM_RTL87XX,
 )
 from esphome.core import CORE
+import esphome.final_validate as fv
+from esphome.types import ConfigType
+
+_LOGGER = logging.getLogger(__name__)
 
 DEPENDENCIES = ["network"]
+
+CONF_SNTP = "sntp"
+
 sntp_ns = cg.esphome_ns.namespace("sntp")
 SNTPComponent = sntp_ns.class_("SNTPComponent", time_.RealTimeClock)
 
 DEFAULT_SERVERS = ["0.pool.ntp.org", "1.pool.ntp.org", "2.pool.ntp.org"]
 
+
+def _sntp_final_validate(config: ConfigType) -> None:
+    """Merge multiple SNTP instances into one, similar to OTA merging behavior."""
+    full_conf = fv.full_config.get()
+    time_confs = full_conf.get(CONF_TIME, [])
+
+    sntp_configs: list[ConfigType] = []
+    other_time_configs: list[ConfigType] = []
+
+    for time_conf in time_confs:
+        if time_conf.get(CONF_PLATFORM) == CONF_SNTP:
+            sntp_configs.append(time_conf)
+        else:
+            other_time_configs.append(time_conf)
+
+    if len(sntp_configs) <= 1:
+        return
+
+    # Merge all SNTP configs into the first one
+    merged = sntp_configs[0]
+    for sntp_conf in sntp_configs[1:]:
+        # Validate that IDs are consistent if manually specified
+        if merged[CONF_ID].is_manual and sntp_conf[CONF_ID].is_manual:
+            raise cv.Invalid(
+                f"Found multiple SNTP configurations but {CONF_ID} is inconsistent"
+            )
+        merged = merge_config(merged, sntp_conf)
+
+    # Deduplicate servers while preserving order
+    servers = merged[CONF_SERVERS]
+    unique_servers = list(dict.fromkeys(servers))
+
+    # Warn if we're dropping servers due to 3-server limit
+    if len(unique_servers) > 3:
+        dropped = unique_servers[3:]
+        unique_servers = unique_servers[:3]
+        _LOGGER.warning(
+            "SNTP supports maximum 3 servers. Dropped excess server(s): %s",
+            dropped,
+        )
+
+    merged[CONF_SERVERS] = unique_servers
+
+    _LOGGER.warning(
+        "Found and merged %d SNTP time configurations into one instance",
+        len(sntp_configs),
+    )
+
+    # Replace time configs with merged SNTP + other time platforms
+    other_time_configs.append(merged)
+    full_conf[CONF_TIME] = other_time_configs
+    fv.full_config.set(full_conf)
+
+
 CONFIG_SCHEMA = cv.All(
     time_.TIME_SCHEMA.extend(
         {
@@ -40,6 +106,8 @@ CONFIG_SCHEMA = cv.All(
     ),
 )
 
+FINAL_VALIDATE_SCHEMA = _sntp_final_validate
+
 
 async def to_code(config):
     servers = config[CONF_SERVERS]
diff --git a/tests/component_tests/sntp/__init__.py b/tests/component_tests/sntp/__init__.py
new file mode 100644
index 0000000000..7d323a4980
--- /dev/null
+++ b/tests/component_tests/sntp/__init__.py
@@ -0,0 +1 @@
+"""Tests for SNTP component."""
diff --git a/tests/component_tests/sntp/config/sntp_test.yaml b/tests/component_tests/sntp/config/sntp_test.yaml
new file mode 100644
index 0000000000..3942c9606b
--- /dev/null
+++ b/tests/component_tests/sntp/config/sntp_test.yaml
@@ -0,0 +1,22 @@
+esphome:
+  name: sntp-test
+
+esp32:
+  board: esp32dev
+  framework:
+    type: esp-idf
+
+wifi:
+  ssid: "testssid"
+  password: "testpassword"
+
+# Test multiple SNTP instances that should be merged
+time:
+  - platform: sntp
+    servers:
+      - 192.168.1.1
+      - pool.ntp.org
+  - platform: sntp
+    servers:
+      - pool.ntp.org
+      - 192.168.1.2
diff --git a/tests/component_tests/sntp/test_init.py b/tests/component_tests/sntp/test_init.py
new file mode 100644
index 0000000000..9197ff55d0
--- /dev/null
+++ b/tests/component_tests/sntp/test_init.py
@@ -0,0 +1,238 @@
+"""Tests for SNTP time configuration validation."""
+
+from __future__ import annotations
+
+import logging
+from typing import Any
+
+import pytest
+
+from esphome import config_validation as cv
+from esphome.components.sntp.time import CONF_SNTP, _sntp_final_validate
+from esphome.const import CONF_ID, CONF_PLATFORM, CONF_SERVERS, CONF_TIME
+from esphome.core import ID
+import esphome.final_validate as fv
+
+
+@pytest.mark.parametrize(
+    ("time_configs", "expected_count", "expected_servers", "warning_messages"),
+    [
+        pytest.param(
+            [
+                {
+                    CONF_PLATFORM: CONF_SNTP,
+                    CONF_ID: ID("sntp_time", is_manual=False),
+                    CONF_SERVERS: ["192.168.1.1", "pool.ntp.org"],
+                }
+            ],
+            1,
+            ["192.168.1.1", "pool.ntp.org"],
+            [],
+            id="single_instance_no_merge",
+        ),
+        pytest.param(
+            [
+                {
+                    CONF_PLATFORM: CONF_SNTP,
+                    CONF_ID: ID("sntp_time_1", is_manual=False),
+                    CONF_SERVERS: ["192.168.1.1", "pool.ntp.org"],
+                },
+                {
+                    CONF_PLATFORM: CONF_SNTP,
+                    CONF_ID: ID("sntp_time_2", is_manual=False),
+                    CONF_SERVERS: ["192.168.1.2"],
+                },
+            ],
+            1,
+            ["192.168.1.1", "pool.ntp.org", "192.168.1.2"],
+            ["Found and merged 2 SNTP time configurations into one instance"],
+            id="two_instances_merged",
+        ),
+        pytest.param(
+            [
+                {
+                    CONF_PLATFORM: CONF_SNTP,
+                    CONF_ID: ID("sntp_time_1", is_manual=False),
+                    CONF_SERVERS: ["192.168.1.1", "pool.ntp.org"],
+                },
+                {
+                    CONF_PLATFORM: CONF_SNTP,
+                    CONF_ID: ID("sntp_time_2", is_manual=False),
+                    CONF_SERVERS: ["pool.ntp.org", "192.168.1.2"],
+                },
+            ],
+            1,
+            ["192.168.1.1", "pool.ntp.org", "192.168.1.2"],
+            ["Found and merged 2 SNTP time configurations into one instance"],
+            id="deduplication_preserves_order",
+        ),
+        pytest.param(
+            [
+                {
+                    CONF_PLATFORM: CONF_SNTP,
+                    CONF_ID: ID("sntp_time_1", is_manual=False),
+                    CONF_SERVERS: ["192.168.1.1", "pool.ntp.org"],
+                },
+                {
+                    CONF_PLATFORM: CONF_SNTP,
+                    CONF_ID: ID("sntp_time_2", is_manual=False),
+                    CONF_SERVERS: ["192.168.1.2", "pool2.ntp.org"],
+                },
+                {
+                    CONF_PLATFORM: CONF_SNTP,
+                    CONF_ID: ID("sntp_time_3", is_manual=False),
+                    CONF_SERVERS: ["pool3.ntp.org"],
+                },
+            ],
+            1,
+            ["192.168.1.1", "pool.ntp.org", "192.168.1.2"],
+            [
+                "SNTP supports maximum 3 servers. Dropped excess server(s): ['pool2.ntp.org', 'pool3.ntp.org']",
+                "Found and merged 3 SNTP time configurations into one instance",
+            ],
+            id="three_instances_drops_excess_servers",
+        ),
+        pytest.param(
+            [
+                {
+                    CONF_PLATFORM: CONF_SNTP,
+                    CONF_ID: ID("sntp_time_1", is_manual=False),
+                    CONF_SERVERS: [
+                        "192.168.1.1",
+                        "pool.ntp.org",
+                        "pool.ntp.org",
+                        "192.168.1.1",
+                    ],
+                },
+                {
+                    CONF_PLATFORM: CONF_SNTP,
+                    CONF_ID: ID("sntp_time_2", is_manual=False),
+                    CONF_SERVERS: ["pool.ntp.org", "192.168.1.2"],
+                },
+            ],
+            1,
+            ["192.168.1.1", "pool.ntp.org", "192.168.1.2"],
+            ["Found and merged 2 SNTP time configurations into one instance"],
+            id="deduplication_multiple_duplicates",
+        ),
+    ],
+)
+def test_sntp_instance_merging(
+    time_configs: list[dict[str, Any]],
+    expected_count: int,
+    expected_servers: list[str],
+    warning_messages: list[str],
+    caplog: pytest.LogCaptureFixture,
+) -> None:
+    """Test SNTP instance merging behavior."""
+    # Create a mock full config with time configs
+    full_conf = {CONF_TIME: time_configs.copy()}
+
+    # Set the context var
+    token = fv.full_config.set(full_conf)
+    try:
+        with caplog.at_level(logging.WARNING):
+            _sntp_final_validate({})
+
+        # Get the updated config
+        updated_conf = fv.full_config.get()
+
+        # Check if merging occurred
+        if len(time_configs) > 1:
+            # Verify only one SNTP instance remains
+            sntp_instances = [
+                tc
+                for tc in updated_conf[CONF_TIME]
+                if tc.get(CONF_PLATFORM) == CONF_SNTP
+            ]
+            assert len(sntp_instances) == expected_count
+
+            # Verify server list
+            assert sntp_instances[0][CONF_SERVERS] == expected_servers
+
+            # Verify warnings
+            for expected_msg in warning_messages:
+                assert any(
+                    expected_msg in record.message for record in caplog.records
+                ), f"Expected warning message '{expected_msg}' not found in log"
+        else:
+            # Single instance should not trigger merging or warnings
+            assert len(caplog.records) == 0
+            # Config should be unchanged
+            assert updated_conf[CONF_TIME] == time_configs
+    finally:
+        fv.full_config.reset(token)
+
+
+def test_sntp_inconsistent_manual_ids() -> None:
+    """Test that inconsistent manual IDs raise an error."""
+    # Create configs with manual IDs that are inconsistent
+    time_configs = [
+        {
+            CONF_PLATFORM: CONF_SNTP,
+            CONF_ID: ID("sntp_time_1", is_manual=True),
+            CONF_SERVERS: ["192.168.1.1"],
+        },
+        {
+            CONF_PLATFORM: CONF_SNTP,
+            CONF_ID: ID("sntp_time_2", is_manual=True),
+            CONF_SERVERS: ["192.168.1.2"],
+        },
+    ]
+
+    full_conf = {CONF_TIME: time_configs}
+
+    token = fv.full_config.set(full_conf)
+    try:
+        with pytest.raises(
+            cv.Invalid,
+            match="Found multiple SNTP configurations but id is inconsistent",
+        ):
+            _sntp_final_validate({})
+    finally:
+        fv.full_config.reset(token)
+
+
+def test_sntp_with_other_time_platforms(caplog: pytest.LogCaptureFixture) -> None:
+    """Test that SNTP merging doesn't affect other time platforms."""
+    time_configs = [
+        {
+            CONF_PLATFORM: CONF_SNTP,
+            CONF_ID: ID("sntp_time_1", is_manual=False),
+            CONF_SERVERS: ["192.168.1.1"],
+        },
+        {
+            CONF_PLATFORM: "homeassistant",
+            CONF_ID: ID("homeassistant_time", is_manual=False),
+        },
+        {
+            CONF_PLATFORM: CONF_SNTP,
+            CONF_ID: ID("sntp_time_2", is_manual=False),
+            CONF_SERVERS: ["192.168.1.2"],
+        },
+    ]
+
+    full_conf = {CONF_TIME: time_configs.copy()}
+
+    token = fv.full_config.set(full_conf)
+    try:
+        with caplog.at_level(logging.WARNING):
+            _sntp_final_validate({})
+
+        updated_conf = fv.full_config.get()
+
+        # Should have 2 time platforms: 1 merged SNTP + 1 homeassistant
+        assert len(updated_conf[CONF_TIME]) == 2
+
+        # Find the platforms
+        platforms = {tc[CONF_PLATFORM] for tc in updated_conf[CONF_TIME]}
+        assert platforms == {CONF_SNTP, "homeassistant"}
+
+        # Verify SNTP was merged
+        sntp_instances = [
+            tc for tc in updated_conf[CONF_TIME] if tc[CONF_PLATFORM] == CONF_SNTP
+        ]
+        assert len(sntp_instances) == 1
+        assert sntp_instances[0][CONF_SERVERS] == ["192.168.1.1", "192.168.1.2"]
+    finally:
+        fv.full_config.reset(token)

From 96ee38759d7f5a6dd0e9ea7ca4331007ef49e936 Mon Sep 17 00:00:00 2001
From: "J. Nick Koston" <nick@koston.org>
Date: Sun, 16 Nov 2025 18:38:52 -0600
Subject: [PATCH 04/23] [web_server.ota] Merge multiple instances to prevent
 undefined behavior (#11905)

---
 esphome/components/web_server/ota/__init__.py |  58 ++++++-
 .../ota/test_web_server_ota.py                | 153 ++++++++++++++++++
 2 files changed, 210 insertions(+), 1 deletion(-)

diff --git a/esphome/components/web_server/ota/__init__.py b/esphome/components/web_server/ota/__init__.py
index 4a98db8877..260e6aea6d 100644
--- a/esphome/components/web_server/ota/__init__.py
+++ b/esphome/components/web_server/ota/__init__.py
@@ -1,10 +1,17 @@
+import logging
+
 import esphome.codegen as cg
 from esphome.components.esp32 import add_idf_component
 from esphome.components.ota import BASE_OTA_SCHEMA, OTAComponent, ota_to_code
+from esphome.config_helpers import merge_config
 import esphome.config_validation as cv
-from esphome.const import CONF_ID
+from esphome.const import CONF_ID, CONF_OTA, CONF_PLATFORM, CONF_WEB_SERVER
 from esphome.core import CORE, coroutine_with_priority
 from esphome.coroutine import CoroPriority
+import esphome.final_validate as fv
+from esphome.types import ConfigType
+
+_LOGGER = logging.getLogger(__name__)
 
 CODEOWNERS = ["@esphome/core"]
 DEPENDENCIES = ["network", "web_server_base"]
@@ -12,6 +19,53 @@ DEPENDENCIES = ["network", "web_server_base"]
 web_server_ns = cg.esphome_ns.namespace("web_server")
 WebServerOTAComponent = web_server_ns.class_("WebServerOTAComponent", OTAComponent)
 
+
+def _web_server_ota_final_validate(config: ConfigType) -> None:
+    """Merge multiple web_server OTA instances into one.
+
+    Multiple web_server OTA instances register duplicate HTTP handlers for /update,
+    causing undefined behavior. Merge them into a single instance.
+    """
+    full_conf = fv.full_config.get()
+    ota_confs = full_conf.get(CONF_OTA, [])
+
+    web_server_ota_configs: list[ConfigType] = []
+    other_ota_configs: list[ConfigType] = []
+
+    for ota_conf in ota_confs:
+        if ota_conf.get(CONF_PLATFORM) == CONF_WEB_SERVER:
+            web_server_ota_configs.append(ota_conf)
+        else:
+            other_ota_configs.append(ota_conf)
+
+    if len(web_server_ota_configs) <= 1:
+        return
+
+    # Merge all web_server OTA configs into the first one
+    merged = web_server_ota_configs[0]
+    for ota_conf in web_server_ota_configs[1:]:
+        # Validate that IDs are consistent if manually specified
+        if (
+            merged[CONF_ID].is_manual
+            and ota_conf[CONF_ID].is_manual
+            and merged[CONF_ID] != ota_conf[CONF_ID]
+        ):
+            raise cv.Invalid(
+                f"Found multiple web_server OTA configurations but {CONF_ID} is inconsistent"
+            )
+        merged = merge_config(merged, ota_conf)
+
+    _LOGGER.warning(
+        "Found and merged %d web_server OTA configurations into one instance",
+        len(web_server_ota_configs),
+    )
+
+    # Replace OTA configs with merged web_server + other OTA platforms
+    other_ota_configs.append(merged)
+    full_conf[CONF_OTA] = other_ota_configs
+    fv.full_config.set(full_conf)
+
+
 CONFIG_SCHEMA = (
     cv.Schema(
         {
@@ -22,6 +76,8 @@ CONFIG_SCHEMA = (
     .extend(cv.COMPONENT_SCHEMA)
 )
 
+FINAL_VALIDATE_SCHEMA = _web_server_ota_final_validate
+
 
 @coroutine_with_priority(CoroPriority.WEB_SERVER_OTA)
 async def to_code(config):
diff --git a/tests/component_tests/ota/test_web_server_ota.py b/tests/component_tests/ota/test_web_server_ota.py
index 0d8ff6f134..794eaac9be 100644
--- a/tests/component_tests/ota/test_web_server_ota.py
+++ b/tests/component_tests/ota/test_web_server_ota.py
@@ -1,6 +1,18 @@
 """Tests for the web_server OTA platform."""
 
+from __future__ import annotations
+
 from collections.abc import Callable
+import logging
+from typing import Any
+
+import pytest
+
+from esphome import config_validation as cv
+from esphome.components.web_server.ota import _web_server_ota_final_validate
+from esphome.const import CONF_ID, CONF_OTA, CONF_PLATFORM, CONF_WEB_SERVER
+from esphome.core import ID
+import esphome.final_validate as fv
 
 
 def test_web_server_ota_generated(generate_main: Callable[[str], str]) -> None:
@@ -100,3 +112,144 @@ def test_web_server_ota_esp8266(generate_main: Callable[[str], str]) -> None:
     # Check web server OTA component is present
     assert "WebServerOTAComponent" in main_cpp
     assert "web_server::WebServerOTAComponent" in main_cpp
+
+
+@pytest.mark.parametrize(
+    ("ota_configs", "expected_count", "warning_expected"),
+    [
+        pytest.param(
+            [
+                {
+                    CONF_PLATFORM: CONF_WEB_SERVER,
+                    CONF_ID: ID("ota_web", is_manual=False),
+                }
+            ],
+            1,
+            False,
+            id="single_instance_no_merge",
+        ),
+        pytest.param(
+            [
+                {
+                    CONF_PLATFORM: CONF_WEB_SERVER,
+                    CONF_ID: ID("ota_web_1", is_manual=False),
+                },
+                {
+                    CONF_PLATFORM: CONF_WEB_SERVER,
+                    CONF_ID: ID("ota_web_2", is_manual=False),
+                },
+            ],
+            1,
+            True,
+            id="two_instances_merged",
+        ),
+        pytest.param(
+            [
+                {
+                    CONF_PLATFORM: CONF_WEB_SERVER,
+                    CONF_ID: ID("ota_web_1", is_manual=False),
+                },
+                {
+                    CONF_PLATFORM: "esphome",
+                    CONF_ID: ID("ota_esphome", is_manual=False),
+                },
+                {
+                    CONF_PLATFORM: CONF_WEB_SERVER,
+                    CONF_ID: ID("ota_web_2", is_manual=False),
+                },
+            ],
+            2,
+            True,
+            id="mixed_platforms_web_server_merged",
+        ),
+    ],
+)
+def test_web_server_ota_instance_merging(
+    ota_configs: list[dict[str, Any]],
+    expected_count: int,
+    warning_expected: bool,
+    caplog: pytest.LogCaptureFixture,
+) -> None:
+    """Test web_server OTA instance merging behavior."""
+    full_conf = {CONF_OTA: ota_configs.copy()}
+
+    token = fv.full_config.set(full_conf)
+    try:
+        with caplog.at_level(logging.WARNING):
+            _web_server_ota_final_validate({})
+
+        updated_conf = fv.full_config.get()
+
+        # Verify total number of OTA platforms
+        assert len(updated_conf[CONF_OTA]) == expected_count
+
+        # Verify warning
+        if warning_expected:
+            assert any(
+                "Found and merged" in record.message
+                and "web_server OTA" in record.message
+                for record in caplog.records
+            ), "Expected merge warning not found in log"
+        else:
+            assert len(caplog.records) == 0, "Unexpected warnings logged"
+    finally:
+        fv.full_config.reset(token)
+
+
+def test_web_server_ota_consistent_manual_ids(
+    caplog: pytest.LogCaptureFixture,
+) -> None:
+    """Test that consistent manual IDs can be merged successfully."""
+    ota_configs = [
+        {
+            CONF_PLATFORM: CONF_WEB_SERVER,
+            CONF_ID: ID("ota_web", is_manual=True),
+        },
+        {
+            CONF_PLATFORM: CONF_WEB_SERVER,
+            CONF_ID: ID("ota_web", is_manual=True),
+        },
+    ]
+
+    full_conf = {CONF_OTA: ota_configs}
+
+    token = fv.full_config.set(full_conf)
+    try:
+        with caplog.at_level(logging.WARNING):
+            _web_server_ota_final_validate({})
+
+        updated_conf = fv.full_config.get()
+        assert len(updated_conf[CONF_OTA]) == 1
+        assert updated_conf[CONF_OTA][0][CONF_ID].id == "ota_web"
+        assert any(
+            "Found and merged" in record.message and "web_server OTA" in record.message
+            for record in caplog.records
+        )
+    finally:
+        fv.full_config.reset(token)
+
+
+def test_web_server_ota_inconsistent_manual_ids() -> None:
+    """Test that inconsistent manual IDs raise an error."""
+    ota_configs = [
+        {
+            CONF_PLATFORM: CONF_WEB_SERVER,
+            CONF_ID: ID("ota_web_1", is_manual=True),
+        },
+        {
+            CONF_PLATFORM: CONF_WEB_SERVER,
+            CONF_ID: ID("ota_web_2", is_manual=True),
+        },
+    ]
+
+    full_conf = {CONF_OTA: ota_configs}
+
+    token = fv.full_config.set(full_conf)
+    try:
+        with pytest.raises(
+            cv.Invalid,
+            match="Found multiple web_server OTA configurations but id is inconsistent",
+        ):
+            _web_server_ota_final_validate({})
+    finally:
+        fv.full_config.reset(token)

From 3b860e784c462ee07c74b79a0393d29f635d876d Mon Sep 17 00:00:00 2001
From: "J. Nick Koston" <nick@koston.org>
Date: Sun, 16 Nov 2025 18:39:01 -0600
Subject: [PATCH 05/23] [web_server_idf] Fix lwIP assertion crash by shutting
 down sockets on connection close (#11937)

---
 .../components/web_server_idf/web_server_idf.cpp | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/esphome/components/web_server_idf/web_server_idf.cpp b/esphome/components/web_server_idf/web_server_idf.cpp
index 0dab5e7e8c..ce91569de2 100644
--- a/esphome/components/web_server_idf/web_server_idf.cpp
+++ b/esphome/components/web_server_idf/web_server_idf.cpp
@@ -489,10 +489,18 @@ AsyncEventSourceResponse::AsyncEventSourceResponse(const AsyncWebServerRequest *
 
 void AsyncEventSourceResponse::destroy(void *ptr) {
   auto *rsp = static_cast<AsyncEventSourceResponse *>(ptr);
-  ESP_LOGD(TAG, "Event source connection closed (fd: %d)", rsp->fd_.load());
-  // Mark as dead by setting fd to 0 - will be cleaned up in the main loop
-  rsp->fd_.store(0);
-  // Note: We don't delete or remove from set here to avoid race conditions
+  int fd = rsp->fd_.exchange(0);  // Atomically get and clear fd
+
+  if (fd > 0) {
+    ESP_LOGD(TAG, "Event source connection closed (fd: %d)", fd);
+    // Immediately shut down the socket to prevent lwIP from delivering more data
+    // This prevents "recv_tcp: recv for wrong pcb!" assertions when the TCP stack
+    // tries to deliver queued data after the session is marked as dead
+    // See: https://github.com/esphome/esphome/issues/11936
+    shutdown(fd, SHUT_RDWR);
+    // Note: We don't close() the socket - httpd owns it and will close it
+  }
+  // Session will be cleaned up in the main loop to avoid race conditions
 }
 
 // helper for allowing only unique entries in the queue

From aa097a2fe6ba533a23b1598d44290c677d03ef04 Mon Sep 17 00:00:00 2001
From: Anton Sergunov <setosha@gmail.com>
Date: Mon, 17 Nov 2025 07:25:00 +0600
Subject: [PATCH 06/23] [uart] Setup uart pins only if flags are set (#11914)

Co-authored-by: J. Nick Koston <nick+github@koston.org>
---
 .../components/uart/uart_component_esp8266.cpp | 18 +++++++++++++-----
 .../components/uart/uart_component_esp_idf.cpp | 18 +++++++++++++-----
 .../uart/uart_component_libretiny.cpp          |  2 +-
 .../components/uart/uart_component_rp2040.cpp  | 18 +++++++++++++-----
 4 files changed, 40 insertions(+), 16 deletions(-)

diff --git a/esphome/components/uart/uart_component_esp8266.cpp b/esphome/components/uart/uart_component_esp8266.cpp
index 7a453dbb50..c84a877ef4 100644
--- a/esphome/components/uart/uart_component_esp8266.cpp
+++ b/esphome/components/uart/uart_component_esp8266.cpp
@@ -56,11 +56,19 @@ uint32_t ESP8266UartComponent::get_config() {
 }
 
 void ESP8266UartComponent::setup() {
-  if (this->rx_pin_) {
-    this->rx_pin_->setup();
-  }
-  if (this->tx_pin_ && this->rx_pin_ != this->tx_pin_) {
-    this->tx_pin_->setup();
+  auto setup_pin_if_needed = [](InternalGPIOPin *pin) {
+    if (!pin) {
+      return;
+    }
+    const auto mask = gpio::Flags::FLAG_OPEN_DRAIN | gpio::Flags::FLAG_PULLUP | gpio::Flags::FLAG_PULLDOWN;
+    if ((pin->get_flags() & mask) != gpio::Flags::FLAG_NONE) {
+      pin->setup();
+    }
+  };
+
+  setup_pin_if_needed(this->rx_pin_);
+  if (this->rx_pin_ != this->tx_pin_) {
+    setup_pin_if_needed(this->tx_pin_);
   }
 
   // Use Arduino HardwareSerial UARTs if all used pins match the ones
diff --git a/esphome/components/uart/uart_component_esp_idf.cpp b/esphome/components/uart/uart_component_esp_idf.cpp
index 70a13c9e37..61ca8c1c0c 100644
--- a/esphome/components/uart/uart_component_esp_idf.cpp
+++ b/esphome/components/uart/uart_component_esp_idf.cpp
@@ -133,11 +133,19 @@ void IDFUARTComponent::load_settings(bool dump_config) {
     return;
   }
 
-  if (this->rx_pin_) {
-    this->rx_pin_->setup();
-  }
-  if (this->tx_pin_ && this->rx_pin_ != this->tx_pin_) {
-    this->tx_pin_->setup();
+  auto setup_pin_if_needed = [](InternalGPIOPin *pin) {
+    if (!pin) {
+      return;
+    }
+    const auto mask = gpio::Flags::FLAG_OPEN_DRAIN | gpio::Flags::FLAG_PULLUP | gpio::Flags::FLAG_PULLDOWN;
+    if ((pin->get_flags() & mask) != gpio::Flags::FLAG_NONE) {
+      pin->setup();
+    }
+  };
+
+  setup_pin_if_needed(this->rx_pin_);
+  if (this->rx_pin_ != this->tx_pin_) {
+    setup_pin_if_needed(this->tx_pin_);
   }
 
   int8_t tx = this->tx_pin_ != nullptr ? this->tx_pin_->get_pin() : -1;
diff --git a/esphome/components/uart/uart_component_libretiny.cpp b/esphome/components/uart/uart_component_libretiny.cpp
index 8d1d28fce4..1e408b169b 100644
--- a/esphome/components/uart/uart_component_libretiny.cpp
+++ b/esphome/components/uart/uart_component_libretiny.cpp
@@ -53,7 +53,7 @@ void LibreTinyUARTComponent::setup() {
 
   auto shouldFallbackToSoftwareSerial = [&]() -> bool {
     auto hasFlags = [](InternalGPIOPin *pin, const gpio::Flags mask) -> bool {
-      return pin && pin->get_flags() & mask != gpio::Flags::FLAG_NONE;
+      return pin && (pin->get_flags() & mask) != gpio::Flags::FLAG_NONE;
     };
     if (hasFlags(this->tx_pin_, gpio::Flags::FLAG_OPEN_DRAIN | gpio::Flags::FLAG_PULLUP | gpio::Flags::FLAG_PULLDOWN) ||
         hasFlags(this->rx_pin_, gpio::Flags::FLAG_OPEN_DRAIN | gpio::Flags::FLAG_PULLUP | gpio::Flags::FLAG_PULLDOWN)) {
diff --git a/esphome/components/uart/uart_component_rp2040.cpp b/esphome/components/uart/uart_component_rp2040.cpp
index c78691653d..cd3905b5c1 100644
--- a/esphome/components/uart/uart_component_rp2040.cpp
+++ b/esphome/components/uart/uart_component_rp2040.cpp
@@ -52,11 +52,19 @@ uint16_t RP2040UartComponent::get_config() {
 }
 
 void RP2040UartComponent::setup() {
-  if (this->rx_pin_) {
-    this->rx_pin_->setup();
-  }
-  if (this->tx_pin_ && this->rx_pin_ != this->tx_pin_) {
-    this->tx_pin_->setup();
+  auto setup_pin_if_needed = [](InternalGPIOPin *pin) {
+    if (!pin) {
+      return;
+    }
+    const auto mask = gpio::Flags::FLAG_OPEN_DRAIN | gpio::Flags::FLAG_PULLUP | gpio::Flags::FLAG_PULLDOWN;
+    if ((pin->get_flags() & mask) != gpio::Flags::FLAG_NONE) {
+      pin->setup();
+    }
+  };
+
+  setup_pin_if_needed(this->rx_pin_);
+  if (this->rx_pin_ != this->tx_pin_) {
+    setup_pin_if_needed(this->tx_pin_);
   }
 
   uint16_t config = get_config();

From aed80732f965ec9dc93fb1bde0dc5d9e603f866e Mon Sep 17 00:00:00 2001
From: Clyde Stubbs <2366188+clydebarrow@users.noreply.github.com>
Date: Fri, 14 Nov 2025 00:55:48 +1000
Subject: [PATCH 07/23] [esp32] Make esp-idf default framework for P4 (#11884)

---
 esphome/components/esp32/__init__.py | 163 ++++++++++++---------------
 1 file changed, 74 insertions(+), 89 deletions(-)

diff --git a/esphome/components/esp32/__init__.py b/esphome/components/esp32/__init__.py
index 61511cba0c..9741dc76a1 100644
--- a/esphome/components/esp32/__init__.py
+++ b/esphome/components/esp32/__init__.py
@@ -381,8 +381,9 @@ PLATFORM_VERSION_LOOKUP = {
 }
 
 
-def _check_versions(value):
-    value = value.copy()
+def _check_versions(config):
+    config = config.copy()
+    value = config[CONF_FRAMEWORK]
 
     if value[CONF_VERSION] in PLATFORM_VERSION_LOOKUP:
         if CONF_SOURCE in value or CONF_PLATFORM_VERSION in value:
@@ -447,7 +448,7 @@ def _check_versions(value):
             "If there are connectivity or build issues please remove the manual version."
         )
 
-    return value
+    return config
 
 
 def _parse_platform_version(value):
@@ -598,89 +599,72 @@ def _validate_idf_component(config: ConfigType) -> ConfigType:
 
 FRAMEWORK_ESP_IDF = "esp-idf"
 FRAMEWORK_ARDUINO = "arduino"
-FRAMEWORK_SCHEMA = cv.All(
-    cv.Schema(
-        {
-            cv.Optional(CONF_TYPE, default=FRAMEWORK_ARDUINO): cv.one_of(
-                FRAMEWORK_ESP_IDF, FRAMEWORK_ARDUINO
-            ),
-            cv.Optional(CONF_VERSION, default="recommended"): cv.string_strict,
-            cv.Optional(CONF_RELEASE): cv.string_strict,
-            cv.Optional(CONF_SOURCE): cv.string_strict,
-            cv.Optional(CONF_PLATFORM_VERSION): _parse_platform_version,
-            cv.Optional(CONF_SDKCONFIG_OPTIONS, default={}): {
-                cv.string_strict: cv.string_strict
-            },
-            cv.Optional(CONF_LOG_LEVEL, default="ERROR"): cv.one_of(
-                *LOG_LEVELS_IDF, upper=True
-            ),
-            cv.Optional(CONF_ADVANCED, default={}): cv.Schema(
-                {
-                    cv.Optional(CONF_ASSERTION_LEVEL): cv.one_of(
-                        *ASSERTION_LEVELS, upper=True
-                    ),
-                    cv.Optional(CONF_COMPILER_OPTIMIZATION, default="SIZE"): cv.one_of(
-                        *COMPILER_OPTIMIZATIONS, upper=True
-                    ),
-                    cv.Optional(CONF_ENABLE_IDF_EXPERIMENTAL_FEATURES): cv.boolean,
-                    cv.Optional(CONF_ENABLE_LWIP_ASSERT, default=True): cv.boolean,
-                    cv.Optional(
-                        CONF_IGNORE_EFUSE_CUSTOM_MAC, default=False
-                    ): cv.boolean,
-                    cv.Optional(CONF_IGNORE_EFUSE_MAC_CRC): cv.boolean,
-                    # DHCP server is needed for WiFi AP mode. When WiFi component is used,
-                    # it will handle disabling DHCP server when AP is not configured.
-                    # Default to false (disabled) when WiFi is not used.
-                    cv.OnlyWithout(
-                        CONF_ENABLE_LWIP_DHCP_SERVER, "wifi", default=False
-                    ): cv.boolean,
-                    cv.Optional(
-                        CONF_ENABLE_LWIP_MDNS_QUERIES, default=True
-                    ): cv.boolean,
-                    cv.Optional(
-                        CONF_ENABLE_LWIP_BRIDGE_INTERFACE, default=False
-                    ): cv.boolean,
-                    cv.Optional(
-                        CONF_ENABLE_LWIP_TCPIP_CORE_LOCKING, default=True
-                    ): cv.boolean,
-                    cv.Optional(
-                        CONF_ENABLE_LWIP_CHECK_THREAD_SAFETY, default=True
-                    ): cv.boolean,
-                    cv.Optional(
-                        CONF_DISABLE_LIBC_LOCKS_IN_IRAM, default=True
-                    ): cv.boolean,
-                    cv.Optional(
-                        CONF_DISABLE_VFS_SUPPORT_TERMIOS, default=True
-                    ): cv.boolean,
-                    cv.Optional(
-                        CONF_DISABLE_VFS_SUPPORT_SELECT, default=True
-                    ): cv.boolean,
-                    cv.Optional(CONF_DISABLE_VFS_SUPPORT_DIR, default=True): cv.boolean,
-                    cv.Optional(CONF_EXECUTE_FROM_PSRAM): cv.boolean,
-                    cv.Optional(CONF_LOOP_TASK_STACK_SIZE, default=8192): cv.int_range(
-                        min=8192, max=32768
-                    ),
-                }
-            ),
-            cv.Optional(CONF_COMPONENTS, default=[]): cv.ensure_list(
-                cv.All(
-                    cv.Schema(
-                        {
-                            cv.Required(CONF_NAME): cv.string_strict,
-                            cv.Optional(CONF_SOURCE): cv.git_ref,
-                            cv.Optional(CONF_REF): cv.string,
-                            cv.Optional(CONF_PATH): cv.string,
-                            cv.Optional(CONF_REFRESH): cv.All(
-                                cv.string, cv.source_refresh
-                            ),
-                        }
-                    ),
-                    _validate_idf_component,
-                )
-            ),
-        }
-    ),
-    _check_versions,
+FRAMEWORK_SCHEMA = cv.Schema(
+    {
+        cv.Optional(CONF_TYPE): cv.one_of(FRAMEWORK_ESP_IDF, FRAMEWORK_ARDUINO),
+        cv.Optional(CONF_VERSION, default="recommended"): cv.string_strict,
+        cv.Optional(CONF_RELEASE): cv.string_strict,
+        cv.Optional(CONF_SOURCE): cv.string_strict,
+        cv.Optional(CONF_PLATFORM_VERSION): _parse_platform_version,
+        cv.Optional(CONF_SDKCONFIG_OPTIONS, default={}): {
+            cv.string_strict: cv.string_strict
+        },
+        cv.Optional(CONF_LOG_LEVEL, default="ERROR"): cv.one_of(
+            *LOG_LEVELS_IDF, upper=True
+        ),
+        cv.Optional(CONF_ADVANCED, default={}): cv.Schema(
+            {
+                cv.Optional(CONF_ASSERTION_LEVEL): cv.one_of(
+                    *ASSERTION_LEVELS, upper=True
+                ),
+                cv.Optional(CONF_COMPILER_OPTIMIZATION, default="SIZE"): cv.one_of(
+                    *COMPILER_OPTIMIZATIONS, upper=True
+                ),
+                cv.Optional(CONF_ENABLE_IDF_EXPERIMENTAL_FEATURES): cv.boolean,
+                cv.Optional(CONF_ENABLE_LWIP_ASSERT, default=True): cv.boolean,
+                cv.Optional(CONF_IGNORE_EFUSE_CUSTOM_MAC, default=False): cv.boolean,
+                cv.Optional(CONF_IGNORE_EFUSE_MAC_CRC): cv.boolean,
+                # DHCP server is needed for WiFi AP mode. When WiFi component is used,
+                # it will handle disabling DHCP server when AP is not configured.
+                # Default to false (disabled) when WiFi is not used.
+                cv.OnlyWithout(
+                    CONF_ENABLE_LWIP_DHCP_SERVER, "wifi", default=False
+                ): cv.boolean,
+                cv.Optional(CONF_ENABLE_LWIP_MDNS_QUERIES, default=True): cv.boolean,
+                cv.Optional(
+                    CONF_ENABLE_LWIP_BRIDGE_INTERFACE, default=False
+                ): cv.boolean,
+                cv.Optional(
+                    CONF_ENABLE_LWIP_TCPIP_CORE_LOCKING, default=True
+                ): cv.boolean,
+                cv.Optional(
+                    CONF_ENABLE_LWIP_CHECK_THREAD_SAFETY, default=True
+                ): cv.boolean,
+                cv.Optional(CONF_DISABLE_LIBC_LOCKS_IN_IRAM, default=True): cv.boolean,
+                cv.Optional(CONF_DISABLE_VFS_SUPPORT_TERMIOS, default=True): cv.boolean,
+                cv.Optional(CONF_DISABLE_VFS_SUPPORT_SELECT, default=True): cv.boolean,
+                cv.Optional(CONF_DISABLE_VFS_SUPPORT_DIR, default=True): cv.boolean,
+                cv.Optional(CONF_EXECUTE_FROM_PSRAM): cv.boolean,
+                cv.Optional(CONF_LOOP_TASK_STACK_SIZE, default=8192): cv.int_range(
+                    min=8192, max=32768
+                ),
+            }
+        ),
+        cv.Optional(CONF_COMPONENTS, default=[]): cv.ensure_list(
+            cv.All(
+                cv.Schema(
+                    {
+                        cv.Required(CONF_NAME): cv.string_strict,
+                        cv.Optional(CONF_SOURCE): cv.git_ref,
+                        cv.Optional(CONF_REF): cv.string,
+                        cv.Optional(CONF_PATH): cv.string,
+                        cv.Optional(CONF_REFRESH): cv.All(cv.string, cv.source_refresh),
+                    }
+                ),
+                _validate_idf_component,
+            )
+        ),
+    }
 )
 
 
@@ -743,11 +727,11 @@ def _show_framework_migration_message(name: str, variant: str) -> None:
 
 
 def _set_default_framework(config):
+    config = config.copy()
     if CONF_FRAMEWORK not in config:
-        config = config.copy()
-
-        variant = config[CONF_VARIANT]
         config[CONF_FRAMEWORK] = FRAMEWORK_SCHEMA({})
+    if CONF_TYPE not in config[CONF_FRAMEWORK]:
+        variant = config[CONF_VARIANT]
         if variant in ARDUINO_ALLOWED_VARIANTS:
             config[CONF_FRAMEWORK][CONF_TYPE] = FRAMEWORK_ARDUINO
             _show_framework_migration_message(
@@ -787,6 +771,7 @@ CONFIG_SCHEMA = cv.All(
     ),
     _detect_variant,
     _set_default_framework,
+    _check_versions,
     set_core_data,
     cv.has_at_least_one_key(CONF_BOARD, CONF_VARIANT),
 )

From fe00e209fff4f9c2e3e3b4c4664a300503488e94 Mon Sep 17 00:00:00 2001
From: Clyde Stubbs <2366188+clydebarrow@users.noreply.github.com>
Date: Fri, 14 Nov 2025 01:52:08 +1000
Subject: [PATCH 08/23] [esp32] Add sdkconfig flag to make OTA work for 32MB
 flash (#11883)

Co-authored-by: Jonathan Swoboda <154711427+swoboda1337@users.noreply.github.com>
---
 esphome/components/esp32/__init__.py          | 81 +++++++++----------
 tests/components/esp32/test.esp32-p4-idf.yaml | 27 +++++++
 2 files changed, 67 insertions(+), 41 deletions(-)
 create mode 100644 tests/components/esp32/test.esp32-p4-idf.yaml

diff --git a/esphome/components/esp32/__init__.py b/esphome/components/esp32/__init__.py
index 9741dc76a1..0f85e585f7 100644
--- a/esphome/components/esp32/__init__.py
+++ b/esphome/components/esp32/__init__.py
@@ -498,6 +498,8 @@ def final_validate(config):
     from esphome.components.psram import DOMAIN as PSRAM_DOMAIN
 
     errs = []
+    conf_fw = config[CONF_FRAMEWORK]
+    advanced = conf_fw[CONF_ADVANCED]
     full_config = fv.full_config.get()
     if pio_options := full_config[CONF_ESPHOME].get(CONF_PLATFORMIO_OPTIONS):
         pio_flash_size_key = "board_upload.flash_size"
@@ -514,22 +516,14 @@ def final_validate(config):
                     f"Please specify {CONF_FLASH_SIZE} within esp32 configuration only"
                 )
             )
-    if (
-        config[CONF_VARIANT] != VARIANT_ESP32
-        and CONF_ADVANCED in (conf_fw := config[CONF_FRAMEWORK])
-        and CONF_IGNORE_EFUSE_MAC_CRC in conf_fw[CONF_ADVANCED]
-    ):
+    if config[CONF_VARIANT] != VARIANT_ESP32 and advanced[CONF_IGNORE_EFUSE_MAC_CRC]:
         errs.append(
             cv.Invalid(
                 f"'{CONF_IGNORE_EFUSE_MAC_CRC}' is not supported on {config[CONF_VARIANT]}",
                 path=[CONF_FRAMEWORK, CONF_ADVANCED, CONF_IGNORE_EFUSE_MAC_CRC],
             )
         )
-    if (
-        config.get(CONF_FRAMEWORK, {})
-        .get(CONF_ADVANCED, {})
-        .get(CONF_EXECUTE_FROM_PSRAM)
-    ):
+    if advanced[CONF_EXECUTE_FROM_PSRAM]:
         if config[CONF_VARIANT] != VARIANT_ESP32S3:
             errs.append(
                 cv.Invalid(
@@ -545,6 +539,17 @@ def final_validate(config):
                 )
             )
 
+    if (
+        config[CONF_FLASH_SIZE] == "32MB"
+        and "ota" in full_config
+        and not advanced[CONF_ENABLE_IDF_EXPERIMENTAL_FEATURES]
+    ):
+        errs.append(
+            cv.Invalid(
+                f"OTA with 32MB flash requires '{CONF_ENABLE_IDF_EXPERIMENTAL_FEATURES}' to be set in the '{CONF_ADVANCED}' section of the esp32 configuration",
+                path=[CONF_FLASH_SIZE],
+            )
+        )
     if errs:
         raise cv.MultipleInvalid(errs)
 
@@ -620,10 +625,12 @@ FRAMEWORK_SCHEMA = cv.Schema(
                 cv.Optional(CONF_COMPILER_OPTIMIZATION, default="SIZE"): cv.one_of(
                     *COMPILER_OPTIMIZATIONS, upper=True
                 ),
-                cv.Optional(CONF_ENABLE_IDF_EXPERIMENTAL_FEATURES): cv.boolean,
+                cv.Optional(
+                    CONF_ENABLE_IDF_EXPERIMENTAL_FEATURES, default=False
+                ): cv.boolean,
                 cv.Optional(CONF_ENABLE_LWIP_ASSERT, default=True): cv.boolean,
                 cv.Optional(CONF_IGNORE_EFUSE_CUSTOM_MAC, default=False): cv.boolean,
-                cv.Optional(CONF_IGNORE_EFUSE_MAC_CRC): cv.boolean,
+                cv.Optional(CONF_IGNORE_EFUSE_MAC_CRC, default=False): cv.boolean,
                 # DHCP server is needed for WiFi AP mode. When WiFi component is used,
                 # it will handle disabling DHCP server when AP is not configured.
                 # Default to false (disabled) when WiFi is not used.
@@ -644,7 +651,7 @@ FRAMEWORK_SCHEMA = cv.Schema(
                 cv.Optional(CONF_DISABLE_VFS_SUPPORT_TERMIOS, default=True): cv.boolean,
                 cv.Optional(CONF_DISABLE_VFS_SUPPORT_SELECT, default=True): cv.boolean,
                 cv.Optional(CONF_DISABLE_VFS_SUPPORT_DIR, default=True): cv.boolean,
-                cv.Optional(CONF_EXECUTE_FROM_PSRAM): cv.boolean,
+                cv.Optional(CONF_EXECUTE_FROM_PSRAM, default=False): cv.boolean,
                 cv.Optional(CONF_LOOP_TASK_STACK_SIZE, default=8192): cv.int_range(
                     min=8192, max=32768
                 ),
@@ -790,9 +797,7 @@ def _configure_lwip_max_sockets(conf: dict) -> None:
     from esphome.components.socket import KEY_SOCKET_CONSUMERS
 
     # Check if user manually specified CONFIG_LWIP_MAX_SOCKETS
-    user_max_sockets = conf.get(CONF_SDKCONFIG_OPTIONS, {}).get(
-        "CONFIG_LWIP_MAX_SOCKETS"
-    )
+    user_max_sockets = conf[CONF_SDKCONFIG_OPTIONS].get("CONFIG_LWIP_MAX_SOCKETS")
 
     socket_consumers: dict[str, int] = CORE.data.get(KEY_SOCKET_CONSUMERS, {})
     total_sockets = sum(socket_consumers.values())
@@ -962,23 +967,18 @@ async def to_code(config):
     # WiFi component handles its own optimization when AP mode is not used
     # When using Arduino with Ethernet, DHCP server functions must be available
     # for the Network library to compile, even if not actively used
-    if (
-        CONF_ENABLE_LWIP_DHCP_SERVER in advanced
-        and not advanced[CONF_ENABLE_LWIP_DHCP_SERVER]
-        and not (
-            conf[CONF_TYPE] == FRAMEWORK_ARDUINO
-            and "ethernet" in CORE.loaded_integrations
-        )
+    if advanced.get(CONF_ENABLE_LWIP_DHCP_SERVER) is False and not (
+        conf[CONF_TYPE] == FRAMEWORK_ARDUINO and "ethernet" in CORE.loaded_integrations
     ):
         add_idf_sdkconfig_option("CONFIG_LWIP_DHCPS", False)
-    if not advanced.get(CONF_ENABLE_LWIP_MDNS_QUERIES, True):
+    if not advanced[CONF_ENABLE_LWIP_MDNS_QUERIES]:
         add_idf_sdkconfig_option("CONFIG_LWIP_DNS_SUPPORT_MDNS_QUERIES", False)
-    if not advanced.get(CONF_ENABLE_LWIP_BRIDGE_INTERFACE, False):
+    if not advanced[CONF_ENABLE_LWIP_BRIDGE_INTERFACE]:
         add_idf_sdkconfig_option("CONFIG_LWIP_BRIDGEIF_MAX_PORTS", 0)
 
     _configure_lwip_max_sockets(conf)
 
-    if advanced.get(CONF_EXECUTE_FROM_PSRAM, False):
+    if advanced[CONF_EXECUTE_FROM_PSRAM]:
         add_idf_sdkconfig_option("CONFIG_SPIRAM_FETCH_INSTRUCTIONS", True)
         add_idf_sdkconfig_option("CONFIG_SPIRAM_RODATA", True)
 
@@ -989,23 +989,22 @@ async def to_code(config):
     # - select() on 4 sockets: ~190μs (Arduino/core locking) vs ~235μs (ESP-IDF default)
     # - Up to 200% slower under load when all operations queue through tcpip_thread
     # Enabling this makes ESP-IDF socket performance match Arduino framework.
-    if advanced.get(CONF_ENABLE_LWIP_TCPIP_CORE_LOCKING, True):
+    if advanced[CONF_ENABLE_LWIP_TCPIP_CORE_LOCKING]:
         add_idf_sdkconfig_option("CONFIG_LWIP_TCPIP_CORE_LOCKING", True)
-    if advanced.get(CONF_ENABLE_LWIP_CHECK_THREAD_SAFETY, True):
+    if advanced[CONF_ENABLE_LWIP_CHECK_THREAD_SAFETY]:
         add_idf_sdkconfig_option("CONFIG_LWIP_CHECK_THREAD_SAFETY", True)
 
     # Disable placing libc locks in IRAM to save RAM
     # This is safe for ESPHome since no IRAM ISRs (interrupts that run while cache is disabled)
     # use libc lock APIs. Saves approximately 1.3KB (1,356 bytes) of IRAM.
-    if advanced.get(CONF_DISABLE_LIBC_LOCKS_IN_IRAM, True):
+    if advanced[CONF_DISABLE_LIBC_LOCKS_IN_IRAM]:
         add_idf_sdkconfig_option("CONFIG_LIBC_LOCKS_PLACE_IN_IRAM", False)
 
     # Disable VFS support for termios (terminal I/O functions)
     # ESPHome doesn't use termios functions on ESP32 (only used in host UART driver).
     # Saves approximately 1.8KB of flash when disabled (default).
     add_idf_sdkconfig_option(
-        "CONFIG_VFS_SUPPORT_TERMIOS",
-        not advanced.get(CONF_DISABLE_VFS_SUPPORT_TERMIOS, True),
+        "CONFIG_VFS_SUPPORT_TERMIOS", not advanced[CONF_DISABLE_VFS_SUPPORT_TERMIOS]
     )
 
     # Disable VFS support for select() with file descriptors
@@ -1019,8 +1018,7 @@ async def to_code(config):
     else:
         # No component needs it - allow user to control (default: disabled)
         add_idf_sdkconfig_option(
-            "CONFIG_VFS_SUPPORT_SELECT",
-            not advanced.get(CONF_DISABLE_VFS_SUPPORT_SELECT, True),
+            "CONFIG_VFS_SUPPORT_SELECT", not advanced[CONF_DISABLE_VFS_SUPPORT_SELECT]
         )
 
     # Disable VFS support for directory functions (opendir, readdir, mkdir, etc.)
@@ -1033,8 +1031,7 @@ async def to_code(config):
     else:
         # No component needs it - allow user to control (default: disabled)
         add_idf_sdkconfig_option(
-            "CONFIG_VFS_SUPPORT_DIR",
-            not advanced.get(CONF_DISABLE_VFS_SUPPORT_DIR, True),
+            "CONFIG_VFS_SUPPORT_DIR", not advanced[CONF_DISABLE_VFS_SUPPORT_DIR]
         )
 
     cg.add_platformio_option("board_build.partitions", "partitions.csv")
@@ -1048,7 +1045,7 @@ async def to_code(config):
             add_idf_sdkconfig_option(flag, assertion_level == key)
 
     add_idf_sdkconfig_option("CONFIG_COMPILER_OPTIMIZATION_DEFAULT", False)
-    compiler_optimization = advanced.get(CONF_COMPILER_OPTIMIZATION)
+    compiler_optimization = advanced[CONF_COMPILER_OPTIMIZATION]
     for key, flag in COMPILER_OPTIMIZATIONS.items():
         add_idf_sdkconfig_option(flag, compiler_optimization == key)
 
@@ -1057,18 +1054,20 @@ async def to_code(config):
         conf[CONF_ADVANCED][CONF_ENABLE_LWIP_ASSERT],
     )
 
-    if advanced.get(CONF_IGNORE_EFUSE_MAC_CRC):
+    if advanced[CONF_IGNORE_EFUSE_MAC_CRC]:
         add_idf_sdkconfig_option("CONFIG_ESP_MAC_IGNORE_MAC_CRC_ERROR", True)
         add_idf_sdkconfig_option("CONFIG_ESP_PHY_CALIBRATION_AND_DATA_STORAGE", False)
-    if advanced.get(CONF_ENABLE_IDF_EXPERIMENTAL_FEATURES):
+    if advanced[CONF_ENABLE_IDF_EXPERIMENTAL_FEATURES]:
         _LOGGER.warning(
             "Using experimental features in ESP-IDF may result in unexpected failures."
         )
         add_idf_sdkconfig_option("CONFIG_IDF_EXPERIMENTAL_FEATURES", True)
+        if config[CONF_FLASH_SIZE] == "32MB":
+            add_idf_sdkconfig_option(
+                "CONFIG_BOOTLOADER_CACHE_32BIT_ADDR_QUAD_FLASH", True
+            )
 
-    cg.add_define(
-        "ESPHOME_LOOP_TASK_STACK_SIZE", advanced.get(CONF_LOOP_TASK_STACK_SIZE)
-    )
+    cg.add_define("ESPHOME_LOOP_TASK_STACK_SIZE", advanced[CONF_LOOP_TASK_STACK_SIZE])
 
     cg.add_define(
         "USE_ESP_IDF_VERSION_CODE",
diff --git a/tests/components/esp32/test.esp32-p4-idf.yaml b/tests/components/esp32/test.esp32-p4-idf.yaml
new file mode 100644
index 0000000000..a4c930f236
--- /dev/null
+++ b/tests/components/esp32/test.esp32-p4-idf.yaml
@@ -0,0 +1,27 @@
+esp32:
+  variant: esp32p4
+  flash_size: 32MB
+  cpu_frequency: 400MHz
+  framework:
+    type: esp-idf
+    advanced:
+      enable_idf_experimental_features: yes
+
+ota:
+  platform: esphome
+
+wifi:
+  ssid: MySSID
+  password: password1
+
+esp32_hosted:
+  variant: ESP32C6
+  slot: 1
+  active_high: true
+  reset_pin: GPIO15
+  cmd_pin: GPIO13
+  clk_pin: GPIO12
+  d0_pin: GPIO11
+  d1_pin: GPIO10
+  d2_pin: GPIO9
+  d3_pin: GPIO8

From eb54c0026dfcab03fbb841ce5fd374554fa61960 Mon Sep 17 00:00:00 2001
From: Edward Firmo <94725493+edwardtfn@users.noreply.github.com>
Date: Thu, 13 Nov 2025 19:08:06 +0100
Subject: [PATCH 09/23] [light] Fix missing `ColorMode::BRIGHTNESS` case in
 logging (#11836)

---
 esphome/components/light/light_call.cpp | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/esphome/components/light/light_call.cpp b/esphome/components/light/light_call.cpp
index 8365ac77cd..b15ff84b97 100644
--- a/esphome/components/light/light_call.cpp
+++ b/esphome/components/light/light_call.cpp
@@ -52,8 +52,10 @@ static void log_invalid_parameter(const char *name, const LogString *message) {
   }
 
 static const LogString *color_mode_to_human(ColorMode color_mode) {
-  if (color_mode == ColorMode::UNKNOWN)
-    return LOG_STR("Unknown");
+  if (color_mode == ColorMode::ON_OFF)
+    return LOG_STR("On/Off");
+  if (color_mode == ColorMode::BRIGHTNESS)
+    return LOG_STR("Brightness");
   if (color_mode == ColorMode::WHITE)
     return LOG_STR("White");
   if (color_mode == ColorMode::COLOR_TEMPERATURE)
@@ -68,7 +70,7 @@ static const LogString *color_mode_to_human(ColorMode color_mode) {
     return LOG_STR("RGB + cold/warm white");
   if (color_mode == ColorMode::RGB_COLOR_TEMPERATURE)
     return LOG_STR("RGB + color temperature");
-  return LOG_STR("");
+  return LOG_STR("Unknown");
 }
 
 // Helper to log percentage values

From 7ce94c27feeade6a50082ed9f14165c056fb2a71 Mon Sep 17 00:00:00 2001
From: Edward Firmo <94725493+edwardtfn@users.noreply.github.com>
Date: Fri, 14 Nov 2025 15:13:48 +0100
Subject: [PATCH 10/23] [wifi] Allow `use_psram` with Arduino (#11902)

---
 esphome/components/wifi/__init__.py | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/esphome/components/wifi/__init__.py b/esphome/components/wifi/__init__.py
index 4dbb425e4b..11bd7798e2 100644
--- a/esphome/components/wifi/__init__.py
+++ b/esphome/components/wifi/__init__.py
@@ -12,7 +12,6 @@ from esphome.components.network import (
 from esphome.components.psram import is_guaranteed as psram_is_guaranteed
 from esphome.config_helpers import filter_source_files_from_platform
 import esphome.config_validation as cv
-from esphome.config_validation import only_with_esp_idf
 from esphome.const import (
     CONF_AP,
     CONF_BSSID,
@@ -352,7 +351,7 @@ CONFIG_SCHEMA = cv.All(
                 single=True
             ),
             cv.Optional(CONF_USE_PSRAM): cv.All(
-                only_with_esp_idf, cv.requires_component("psram"), cv.boolean
+                cv.only_on_esp32, cv.requires_component("psram"), cv.boolean
             ),
         }
     ),

From 97c4914573b5b7444f44c526e1fb11d13cdcfe38 Mon Sep 17 00:00:00 2001
From: Jonathan Swoboda <154711427+swoboda1337@users.noreply.github.com>
Date: Fri, 14 Nov 2025 14:06:08 -0500
Subject: [PATCH 11/23] [uart] Improve error handling and validate buffer size
 (#11895)

Co-authored-by: J. Nick Koston <nick+github@koston.org>
---
 esphome/components/uart/__init__.py           | 19 ++++++++++
 .../uart/uart_component_esp_idf.cpp           | 35 +++++++++++++++----
 2 files changed, 47 insertions(+), 7 deletions(-)

diff --git a/esphome/components/uart/__init__.py b/esphome/components/uart/__init__.py
index cbc11d0db0..7b0d9726b8 100644
--- a/esphome/components/uart/__init__.py
+++ b/esphome/components/uart/__init__.py
@@ -1,3 +1,4 @@
+from logging import getLogger
 import math
 import re
 
@@ -35,6 +36,8 @@ from esphome.core import CORE, ID
 import esphome.final_validate as fv
 from esphome.yaml_util import make_data_base
 
+_LOGGER = getLogger(__name__)
+
 CODEOWNERS = ["@esphome/core"]
 uart_ns = cg.esphome_ns.namespace("uart")
 UARTComponent = uart_ns.class_("UARTComponent")
@@ -130,6 +133,21 @@ def validate_host_config(config):
     return config
 
 
+def validate_rx_buffer_size(config):
+    if CORE.is_esp32:
+        # ESP32 UART hardware FIFO is 128 bytes (LP UART is 16 bytes, but we use 128 as safe minimum)
+        # rx_buffer_size must be greater than the hardware FIFO length
+        min_buffer_size = 128
+        if config[CONF_RX_BUFFER_SIZE] <= min_buffer_size:
+            _LOGGER.warning(
+                "UART rx_buffer_size (%d bytes) is too small and must be greater than the hardware "
+                "FIFO size (%d bytes). The buffer size will be automatically adjusted at runtime.",
+                config[CONF_RX_BUFFER_SIZE],
+                min_buffer_size,
+            )
+    return config
+
+
 def _uart_declare_type(value):
     if CORE.is_esp8266:
         return cv.declare_id(ESP8266UartComponent)(value)
@@ -247,6 +265,7 @@ CONFIG_SCHEMA = cv.All(
     ).extend(cv.COMPONENT_SCHEMA),
     cv.has_at_least_one_key(CONF_TX_PIN, CONF_RX_PIN, CONF_PORT),
     validate_host_config,
+    validate_rx_buffer_size,
 )
 
 
diff --git a/esphome/components/uart/uart_component_esp_idf.cpp b/esphome/components/uart/uart_component_esp_idf.cpp
index 73813d2d5b..70a13c9e37 100644
--- a/esphome/components/uart/uart_component_esp_idf.cpp
+++ b/esphome/components/uart/uart_component_esp_idf.cpp
@@ -91,6 +91,16 @@ void IDFUARTComponent::setup() {
   this->uart_num_ = static_cast<uart_port_t>(next_uart_num++);
   this->lock_ = xSemaphoreCreateMutex();
 
+#if (SOC_UART_LP_NUM >= 1)
+  size_t fifo_len = ((this->uart_num_ < SOC_UART_HP_NUM) ? SOC_UART_FIFO_LEN : SOC_LP_UART_FIFO_LEN);
+#else
+  size_t fifo_len = SOC_UART_FIFO_LEN;
+#endif
+  if (this->rx_buffer_size_ <= fifo_len) {
+    ESP_LOGW(TAG, "rx_buffer_size is too small, must be greater than %zu", fifo_len);
+    this->rx_buffer_size_ = fifo_len * 2;
+  }
+
   xSemaphoreTake(this->lock_, portMAX_DELAY);
 
   this->load_settings(false);
@@ -237,8 +247,12 @@ void IDFUARTComponent::set_rx_timeout(size_t rx_timeout) {
 
 void IDFUARTComponent::write_array(const uint8_t *data, size_t len) {
   xSemaphoreTake(this->lock_, portMAX_DELAY);
-  uart_write_bytes(this->uart_num_, data, len);
+  int32_t write_len = uart_write_bytes(this->uart_num_, data, len);
   xSemaphoreGive(this->lock_);
+  if (write_len != (int32_t) len) {
+    ESP_LOGW(TAG, "uart_write_bytes failed: %d != %zu", write_len, len);
+    this->mark_failed();
+  }
 #ifdef USE_UART_DEBUGGER
   for (size_t i = 0; i < len; i++) {
     this->debug_callback_.call(UART_DIRECTION_TX, data[i]);
@@ -267,6 +281,7 @@ bool IDFUARTComponent::peek_byte(uint8_t *data) {
 
 bool IDFUARTComponent::read_array(uint8_t *data, size_t len) {
   size_t length_to_read = len;
+  int32_t read_len = 0;
   if (!this->check_read_timeout_(len))
     return false;
   xSemaphoreTake(this->lock_, portMAX_DELAY);
@@ -277,25 +292,31 @@ bool IDFUARTComponent::read_array(uint8_t *data, size_t len) {
     this->has_peek_ = false;
   }
   if (length_to_read > 0)
-    uart_read_bytes(this->uart_num_, data, length_to_read, 20 / portTICK_PERIOD_MS);
+    read_len = uart_read_bytes(this->uart_num_, data, length_to_read, 20 / portTICK_PERIOD_MS);
   xSemaphoreGive(this->lock_);
 #ifdef USE_UART_DEBUGGER
   for (size_t i = 0; i < len; i++) {
     this->debug_callback_.call(UART_DIRECTION_RX, data[i]);
   }
 #endif
-  return true;
+  return read_len == (int32_t) length_to_read;
 }
 
 int IDFUARTComponent::available() {
-  size_t available;
+  size_t available = 0;
+  esp_err_t err;
 
   xSemaphoreTake(this->lock_, portMAX_DELAY);
-  uart_get_buffered_data_len(this->uart_num_, &available);
-  if (this->has_peek_)
-    available++;
+  err = uart_get_buffered_data_len(this->uart_num_, &available);
   xSemaphoreGive(this->lock_);
 
+  if (err != ESP_OK) {
+    ESP_LOGW(TAG, "uart_get_buffered_data_len failed: %s", esp_err_to_name(err));
+    this->mark_failed();
+  }
+  if (this->has_peek_) {
+    available++;
+  }
   return available;
 }
 

From 6440b5fbf5d05e7b572d9272c8ea8865b59ed513 Mon Sep 17 00:00:00 2001
From: "J. Nick Koston" <nick@koston.org>
Date: Sat, 15 Nov 2025 22:03:43 -0600
Subject: [PATCH 12/23] [ld2412] Fix stuck targets by adding timeout filter
 (#11919)

---
 esphome/components/ld2412/sensor.py | 76 ++++++++++++++++++++++++++---
 1 file changed, 68 insertions(+), 8 deletions(-)

diff --git a/esphome/components/ld2412/sensor.py b/esphome/components/ld2412/sensor.py
index abb823faad..0bfbd9bf1d 100644
--- a/esphome/components/ld2412/sensor.py
+++ b/esphome/components/ld2412/sensor.py
@@ -31,36 +31,84 @@ CONFIG_SCHEMA = cv.Schema(
         cv.GenerateID(CONF_LD2412_ID): cv.use_id(LD2412Component),
         cv.Optional(CONF_DETECTION_DISTANCE): sensor.sensor_schema(
             device_class=DEVICE_CLASS_DISTANCE,
-            filters=[{"throttle_with_priority": cv.TimePeriod(milliseconds=1000)}],
+            filters=[
+                {
+                    "timeout": {
+                        "timeout": cv.TimePeriod(milliseconds=1000),
+                        "value": "last",
+                    }
+                },
+                {"throttle_with_priority": cv.TimePeriod(milliseconds=1000)},
+            ],
             icon=ICON_SIGNAL,
             unit_of_measurement=UNIT_CENTIMETER,
         ),
         cv.Optional(CONF_LIGHT): sensor.sensor_schema(
             device_class=DEVICE_CLASS_ILLUMINANCE,
             entity_category=ENTITY_CATEGORY_DIAGNOSTIC,
-            filters=[{"throttle_with_priority": cv.TimePeriod(milliseconds=1000)}],
+            filters=[
+                {
+                    "timeout": {
+                        "timeout": cv.TimePeriod(milliseconds=1000),
+                        "value": "last",
+                    }
+                },
+                {"throttle_with_priority": cv.TimePeriod(milliseconds=1000)},
+            ],
             icon=ICON_LIGHTBULB,
             unit_of_measurement=UNIT_EMPTY,  # No standard unit for this light sensor
         ),
         cv.Optional(CONF_MOVING_DISTANCE): sensor.sensor_schema(
             device_class=DEVICE_CLASS_DISTANCE,
-            filters=[{"throttle_with_priority": cv.TimePeriod(milliseconds=1000)}],
+            filters=[
+                {
+                    "timeout": {
+                        "timeout": cv.TimePeriod(milliseconds=1000),
+                        "value": "last",
+                    }
+                },
+                {"throttle_with_priority": cv.TimePeriod(milliseconds=1000)},
+            ],
             icon=ICON_SIGNAL,
             unit_of_measurement=UNIT_CENTIMETER,
         ),
         cv.Optional(CONF_MOVING_ENERGY): sensor.sensor_schema(
-            filters=[{"throttle_with_priority": cv.TimePeriod(milliseconds=1000)}],
+            filters=[
+                {
+                    "timeout": {
+                        "timeout": cv.TimePeriod(milliseconds=1000),
+                        "value": "last",
+                    }
+                },
+                {"throttle_with_priority": cv.TimePeriod(milliseconds=1000)},
+            ],
             icon=ICON_MOTION_SENSOR,
             unit_of_measurement=UNIT_PERCENT,
         ),
         cv.Optional(CONF_STILL_DISTANCE): sensor.sensor_schema(
             device_class=DEVICE_CLASS_DISTANCE,
-            filters=[{"throttle_with_priority": cv.TimePeriod(milliseconds=1000)}],
+            filters=[
+                {
+                    "timeout": {
+                        "timeout": cv.TimePeriod(milliseconds=1000),
+                        "value": "last",
+                    }
+                },
+                {"throttle_with_priority": cv.TimePeriod(milliseconds=1000)},
+            ],
             icon=ICON_SIGNAL,
             unit_of_measurement=UNIT_CENTIMETER,
         ),
         cv.Optional(CONF_STILL_ENERGY): sensor.sensor_schema(
-            filters=[{"throttle_with_priority": cv.TimePeriod(milliseconds=1000)}],
+            filters=[
+                {
+                    "timeout": {
+                        "timeout": cv.TimePeriod(milliseconds=1000),
+                        "value": "last",
+                    }
+                },
+                {"throttle_with_priority": cv.TimePeriod(milliseconds=1000)},
+            ],
             icon=ICON_FLASH,
             unit_of_measurement=UNIT_PERCENT,
         ),
@@ -74,7 +122,13 @@ CONFIG_SCHEMA = CONFIG_SCHEMA.extend(
                 cv.Optional(CONF_MOVE_ENERGY): sensor.sensor_schema(
                     entity_category=ENTITY_CATEGORY_DIAGNOSTIC,
                     filters=[
-                        {"throttle_with_priority": cv.TimePeriod(milliseconds=1000)}
+                        {
+                            "timeout": {
+                                "timeout": cv.TimePeriod(milliseconds=1000),
+                                "value": "last",
+                            }
+                        },
+                        {"throttle_with_priority": cv.TimePeriod(milliseconds=1000)},
                     ],
                     icon=ICON_MOTION_SENSOR,
                     unit_of_measurement=UNIT_PERCENT,
@@ -82,7 +136,13 @@ CONFIG_SCHEMA = CONFIG_SCHEMA.extend(
                 cv.Optional(CONF_STILL_ENERGY): sensor.sensor_schema(
                     entity_category=ENTITY_CATEGORY_DIAGNOSTIC,
                     filters=[
-                        {"throttle_with_priority": cv.TimePeriod(milliseconds=1000)}
+                        {
+                            "timeout": {
+                                "timeout": cv.TimePeriod(milliseconds=1000),
+                                "value": "last",
+                            }
+                        },
+                        {"throttle_with_priority": cv.TimePeriod(milliseconds=1000)},
                     ],
                     icon=ICON_FLASH,
                     unit_of_measurement=UNIT_PERCENT,

From d559f9f52e26cc779528fdb5c015cb73560536f1 Mon Sep 17 00:00:00 2001
From: "J. Nick Koston" <nick@koston.org>
Date: Sat, 15 Nov 2025 22:04:25 -0600
Subject: [PATCH 13/23] [ld2410] Add timeout filter to prevent stuck targets
 (#11920)

---
 esphome/components/ld2410/sensor.py | 76 ++++++++++++++++++++++++++---
 1 file changed, 68 insertions(+), 8 deletions(-)

diff --git a/esphome/components/ld2410/sensor.py b/esphome/components/ld2410/sensor.py
index fca2b2ceca..3bd34963bc 100644
--- a/esphome/components/ld2410/sensor.py
+++ b/esphome/components/ld2410/sensor.py
@@ -31,35 +31,83 @@ CONFIG_SCHEMA = cv.Schema(
         cv.GenerateID(CONF_LD2410_ID): cv.use_id(LD2410Component),
         cv.Optional(CONF_MOVING_DISTANCE): sensor.sensor_schema(
             device_class=DEVICE_CLASS_DISTANCE,
-            filters=[{"throttle_with_priority": cv.TimePeriod(milliseconds=1000)}],
+            filters=[
+                {
+                    "timeout": {
+                        "timeout": cv.TimePeriod(milliseconds=1000),
+                        "value": "last",
+                    }
+                },
+                {"throttle_with_priority": cv.TimePeriod(milliseconds=1000)},
+            ],
             icon=ICON_SIGNAL,
             unit_of_measurement=UNIT_CENTIMETER,
         ),
         cv.Optional(CONF_STILL_DISTANCE): sensor.sensor_schema(
             device_class=DEVICE_CLASS_DISTANCE,
-            filters=[{"throttle_with_priority": cv.TimePeriod(milliseconds=1000)}],
+            filters=[
+                {
+                    "timeout": {
+                        "timeout": cv.TimePeriod(milliseconds=1000),
+                        "value": "last",
+                    }
+                },
+                {"throttle_with_priority": cv.TimePeriod(milliseconds=1000)},
+            ],
             icon=ICON_SIGNAL,
             unit_of_measurement=UNIT_CENTIMETER,
         ),
         cv.Optional(CONF_MOVING_ENERGY): sensor.sensor_schema(
-            filters=[{"throttle_with_priority": cv.TimePeriod(milliseconds=1000)}],
+            filters=[
+                {
+                    "timeout": {
+                        "timeout": cv.TimePeriod(milliseconds=1000),
+                        "value": "last",
+                    }
+                },
+                {"throttle_with_priority": cv.TimePeriod(milliseconds=1000)},
+            ],
             icon=ICON_MOTION_SENSOR,
             unit_of_measurement=UNIT_PERCENT,
         ),
         cv.Optional(CONF_STILL_ENERGY): sensor.sensor_schema(
-            filters=[{"throttle_with_priority": cv.TimePeriod(milliseconds=1000)}],
+            filters=[
+                {
+                    "timeout": {
+                        "timeout": cv.TimePeriod(milliseconds=1000),
+                        "value": "last",
+                    }
+                },
+                {"throttle_with_priority": cv.TimePeriod(milliseconds=1000)},
+            ],
             icon=ICON_FLASH,
             unit_of_measurement=UNIT_PERCENT,
         ),
         cv.Optional(CONF_LIGHT): sensor.sensor_schema(
             device_class=DEVICE_CLASS_ILLUMINANCE,
             entity_category=ENTITY_CATEGORY_DIAGNOSTIC,
-            filters=[{"throttle_with_priority": cv.TimePeriod(milliseconds=1000)}],
+            filters=[
+                {
+                    "timeout": {
+                        "timeout": cv.TimePeriod(milliseconds=1000),
+                        "value": "last",
+                    }
+                },
+                {"throttle_with_priority": cv.TimePeriod(milliseconds=1000)},
+            ],
             icon=ICON_LIGHTBULB,
         ),
         cv.Optional(CONF_DETECTION_DISTANCE): sensor.sensor_schema(
             device_class=DEVICE_CLASS_DISTANCE,
-            filters=[{"throttle_with_priority": cv.TimePeriod(milliseconds=1000)}],
+            filters=[
+                {
+                    "timeout": {
+                        "timeout": cv.TimePeriod(milliseconds=1000),
+                        "value": "last",
+                    }
+                },
+                {"throttle_with_priority": cv.TimePeriod(milliseconds=1000)},
+            ],
             icon=ICON_SIGNAL,
             unit_of_measurement=UNIT_CENTIMETER,
         ),
@@ -73,7 +121,13 @@ CONFIG_SCHEMA = CONFIG_SCHEMA.extend(
                 cv.Optional(CONF_MOVE_ENERGY): sensor.sensor_schema(
                     entity_category=ENTITY_CATEGORY_DIAGNOSTIC,
                     filters=[
-                        {"throttle_with_priority": cv.TimePeriod(milliseconds=1000)}
+                        {
+                            "timeout": {
+                                "timeout": cv.TimePeriod(milliseconds=1000),
+                                "value": "last",
+                            }
+                        },
+                        {"throttle_with_priority": cv.TimePeriod(milliseconds=1000)},
                     ],
                     icon=ICON_MOTION_SENSOR,
                     unit_of_measurement=UNIT_PERCENT,
@@ -81,7 +135,13 @@ CONFIG_SCHEMA = CONFIG_SCHEMA.extend(
                 cv.Optional(CONF_STILL_ENERGY): sensor.sensor_schema(
                     entity_category=ENTITY_CATEGORY_DIAGNOSTIC,
                     filters=[
-                        {"throttle_with_priority": cv.TimePeriod(milliseconds=1000)}
+                        {
+                            "timeout": {
+                                "timeout": cv.TimePeriod(milliseconds=1000),
+                                "value": "last",
+                            }
+                        },
+                        {"throttle_with_priority": cv.TimePeriod(milliseconds=1000)},
                     ],
                     icon=ICON_FLASH,
                     unit_of_measurement=UNIT_PERCENT,

From 36868ee7b173628e838951d3fb3c899e66b74866 Mon Sep 17 00:00:00 2001
From: "J. Nick Koston" <nick@koston.org>
Date: Sat, 15 Nov 2025 22:20:57 -0600
Subject: [PATCH 14/23] [scheduler] Fix timing breakage after 49 days of uptime
 on ESP8266/RP2040 (#11924)

---
 esphome/core/scheduler.cpp | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/esphome/core/scheduler.cpp b/esphome/core/scheduler.cpp
index d285af2d0e..d2e0f0dab4 100644
--- a/esphome/core/scheduler.cpp
+++ b/esphome/core/scheduler.cpp
@@ -609,13 +609,12 @@ uint64_t Scheduler::millis_64_(uint32_t now) {
   if (now < last && (last - now) > HALF_MAX_UINT32) {
     this->millis_major_++;
     major++;
+    this->last_millis_ = now;
 #ifdef ESPHOME_DEBUG_SCHEDULER
     ESP_LOGD(TAG, "Detected true 32-bit rollover at %" PRIu32 "ms (was %" PRIu32 ")", now, last);
 #endif /* ESPHOME_DEBUG_SCHEDULER */
-  }
-
-  // Only update if time moved forward
-  if (now > last) {
+  } else if (now > last) {
+    // Only update if time moved forward
     this->last_millis_ = now;
   }
 

From f19296ac7f59c4b2610b127cd1663e11648cf645 Mon Sep 17 00:00:00 2001
From: "J. Nick Koston" <nick@koston.org>
Date: Sun, 16 Nov 2025 07:35:31 -0600
Subject: [PATCH 15/23] [analyze-memory] Show all core symbols > 100 B instead
 of top 15 (#11909)

---
 esphome/analyze_memory/cli.py | 26 ++++++++++++++++++++------
 1 file changed, 20 insertions(+), 6 deletions(-)

diff --git a/esphome/analyze_memory/cli.py b/esphome/analyze_memory/cli.py
index 718f42330d..44ade221f8 100644
--- a/esphome/analyze_memory/cli.py
+++ b/esphome/analyze_memory/cli.py
@@ -15,6 +15,11 @@ from . import (
 class MemoryAnalyzerCLI(MemoryAnalyzer):
     """Memory analyzer with CLI-specific report generation."""
 
+    # Symbol size threshold for detailed analysis
+    SYMBOL_SIZE_THRESHOLD: int = (
+        100  # Show symbols larger than this in detailed analysis
+    )
+
     # Column width constants
     COL_COMPONENT: int = 29
     COL_FLASH_TEXT: int = 14
@@ -191,14 +196,21 @@ class MemoryAnalyzerCLI(MemoryAnalyzer):
                     f"{len(symbols):>{self.COL_CORE_COUNT}} | {percentage:>{self.COL_CORE_PERCENT - 1}.1f}%"
                 )
 
-            # Top 15 largest core symbols
+            # All core symbols above threshold
             lines.append("")
-            lines.append(f"Top 15 Largest {_COMPONENT_CORE} Symbols:")
             sorted_core_symbols = sorted(
                 self._esphome_core_symbols, key=lambda x: x[2], reverse=True
             )
+            large_core_symbols = [
+                (symbol, demangled, size)
+                for symbol, demangled, size in sorted_core_symbols
+                if size > self.SYMBOL_SIZE_THRESHOLD
+            ]
 
-            for i, (symbol, demangled, size) in enumerate(sorted_core_symbols[:15]):
+            lines.append(
+                f"{_COMPONENT_CORE} Symbols > {self.SYMBOL_SIZE_THRESHOLD} B ({len(large_core_symbols)} symbols):"
+            )
+            for i, (symbol, demangled, size) in enumerate(large_core_symbols):
                 lines.append(f"{i + 1}. {demangled} ({size:,} B)")
 
             lines.append("=" * self.TABLE_WIDTH)
@@ -268,13 +280,15 @@ class MemoryAnalyzerCLI(MemoryAnalyzer):
                 lines.append(f"Total size: {comp_mem.flash_total:,} B")
                 lines.append("")
 
-                # Show all symbols > 100 bytes for better visibility
+                # Show all symbols above threshold for better visibility
                 large_symbols = [
-                    (sym, dem, size) for sym, dem, size in sorted_symbols if size > 100
+                    (sym, dem, size)
+                    for sym, dem, size in sorted_symbols
+                    if size > self.SYMBOL_SIZE_THRESHOLD
                 ]
 
                 lines.append(
-                    f"{comp_name} Symbols > 100 B ({len(large_symbols)} symbols):"
+                    f"{comp_name} Symbols > {self.SYMBOL_SIZE_THRESHOLD} B ({len(large_symbols)} symbols):"
                 )
                 for i, (symbol, demangled, size) in enumerate(large_symbols):
                     lines.append(f"{i + 1}. {demangled} ({size:,} B)")

From 91514894817fa318186b29dec48af397f9222ca9 Mon Sep 17 00:00:00 2001
From: "J. Nick Koston" <nick@koston.org>
Date: Sun, 16 Nov 2025 18:38:38 -0600
Subject: [PATCH 16/23] [sntp] Merge multiple instances to fix crash and
 undefined behavior (#11904)

---
 esphome/components/sntp/time.py               |  68 +++++
 tests/component_tests/sntp/__init__.py        |   1 +
 .../sntp/config/sntp_test.yaml                |  22 ++
 tests/component_tests/sntp/test_init.py       | 238 ++++++++++++++++++
 4 files changed, 329 insertions(+)
 create mode 100644 tests/component_tests/sntp/__init__.py
 create mode 100644 tests/component_tests/sntp/config/sntp_test.yaml
 create mode 100644 tests/component_tests/sntp/test_init.py

diff --git a/esphome/components/sntp/time.py b/esphome/components/sntp/time.py
index d27fc9991d..69a2436d3d 100644
--- a/esphome/components/sntp/time.py
+++ b/esphome/components/sntp/time.py
@@ -1,9 +1,14 @@
+import logging
+
 import esphome.codegen as cg
 from esphome.components import time as time_
+from esphome.config_helpers import merge_config
 import esphome.config_validation as cv
 from esphome.const import (
     CONF_ID,
+    CONF_PLATFORM,
     CONF_SERVERS,
+    CONF_TIME,
     PLATFORM_BK72XX,
     PLATFORM_ESP32,
     PLATFORM_ESP8266,
@@ -12,13 +17,74 @@ from esphome.const import (
     PLATFORM_RTL87XX,
 )
 from esphome.core import CORE
+import esphome.final_validate as fv
+from esphome.types import ConfigType
+
+_LOGGER = logging.getLogger(__name__)
 
 DEPENDENCIES = ["network"]
+
+CONF_SNTP = "sntp"
+
 sntp_ns = cg.esphome_ns.namespace("sntp")
 SNTPComponent = sntp_ns.class_("SNTPComponent", time_.RealTimeClock)
 
 DEFAULT_SERVERS = ["0.pool.ntp.org", "1.pool.ntp.org", "2.pool.ntp.org"]
 
+
+def _sntp_final_validate(config: ConfigType) -> None:
+    """Merge multiple SNTP instances into one, similar to OTA merging behavior."""
+    full_conf = fv.full_config.get()
+    time_confs = full_conf.get(CONF_TIME, [])
+
+    sntp_configs: list[ConfigType] = []
+    other_time_configs: list[ConfigType] = []
+
+    for time_conf in time_confs:
+        if time_conf.get(CONF_PLATFORM) == CONF_SNTP:
+            sntp_configs.append(time_conf)
+        else:
+            other_time_configs.append(time_conf)
+
+    if len(sntp_configs) <= 1:
+        return
+
+    # Merge all SNTP configs into the first one
+    merged = sntp_configs[0]
+    for sntp_conf in sntp_configs[1:]:
+        # Validate that IDs are consistent if manually specified
+        if merged[CONF_ID].is_manual and sntp_conf[CONF_ID].is_manual:
+            raise cv.Invalid(
+                f"Found multiple SNTP configurations but {CONF_ID} is inconsistent"
+            )
+        merged = merge_config(merged, sntp_conf)
+
+    # Deduplicate servers while preserving order
+    servers = merged[CONF_SERVERS]
+    unique_servers = list(dict.fromkeys(servers))
+
+    # Warn if we're dropping servers due to 3-server limit
+    if len(unique_servers) > 3:
+        dropped = unique_servers[3:]
+        unique_servers = unique_servers[:3]
+        _LOGGER.warning(
+            "SNTP supports maximum 3 servers. Dropped excess server(s): %s",
+            dropped,
+        )
+
+    merged[CONF_SERVERS] = unique_servers
+
+    _LOGGER.warning(
+        "Found and merged %d SNTP time configurations into one instance",
+        len(sntp_configs),
+    )
+
+    # Replace time configs with merged SNTP + other time platforms
+    other_time_configs.append(merged)
+    full_conf[CONF_TIME] = other_time_configs
+    fv.full_config.set(full_conf)
+
+
 CONFIG_SCHEMA = cv.All(
     time_.TIME_SCHEMA.extend(
         {
@@ -40,6 +106,8 @@ CONFIG_SCHEMA = cv.All(
     ),
 )
 
+FINAL_VALIDATE_SCHEMA = _sntp_final_validate
+
 
 async def to_code(config):
     servers = config[CONF_SERVERS]
diff --git a/tests/component_tests/sntp/__init__.py b/tests/component_tests/sntp/__init__.py
new file mode 100644
index 0000000000..7d323a4980
--- /dev/null
+++ b/tests/component_tests/sntp/__init__.py
@@ -0,0 +1 @@
+"""Tests for SNTP component."""
diff --git a/tests/component_tests/sntp/config/sntp_test.yaml b/tests/component_tests/sntp/config/sntp_test.yaml
new file mode 100644
index 0000000000..3942c9606b
--- /dev/null
+++ b/tests/component_tests/sntp/config/sntp_test.yaml
@@ -0,0 +1,22 @@
+esphome:
+  name: sntp-test
+
+esp32:
+  board: esp32dev
+  framework:
+    type: esp-idf
+
+wifi:
+  ssid: "testssid"
+  password: "testpassword"
+
+# Test multiple SNTP instances that should be merged
+time:
+  - platform: sntp
+    servers:
+      - 192.168.1.1
+      - pool.ntp.org
+  - platform: sntp
+    servers:
+      - pool.ntp.org
+      - 192.168.1.2
diff --git a/tests/component_tests/sntp/test_init.py b/tests/component_tests/sntp/test_init.py
new file mode 100644
index 0000000000..9197ff55d0
--- /dev/null
+++ b/tests/component_tests/sntp/test_init.py
@@ -0,0 +1,238 @@
+"""Tests for SNTP time configuration validation."""
+
+from __future__ import annotations
+
+import logging
+from typing import Any
+
+import pytest
+
+from esphome import config_validation as cv
+from esphome.components.sntp.time import CONF_SNTP, _sntp_final_validate
+from esphome.const import CONF_ID, CONF_PLATFORM, CONF_SERVERS, CONF_TIME
+from esphome.core import ID
+import esphome.final_validate as fv
+
+
+@pytest.mark.parametrize(
+    ("time_configs", "expected_count", "expected_servers", "warning_messages"),
+    [
+        pytest.param(
+            [
+                {
+                    CONF_PLATFORM: CONF_SNTP,
+                    CONF_ID: ID("sntp_time", is_manual=False),
+                    CONF_SERVERS: ["192.168.1.1", "pool.ntp.org"],
+                }
+            ],
+            1,
+            ["192.168.1.1", "pool.ntp.org"],
+            [],
+            id="single_instance_no_merge",
+        ),
+        pytest.param(
+            [
+                {
+                    CONF_PLATFORM: CONF_SNTP,
+                    CONF_ID: ID("sntp_time_1", is_manual=False),
+                    CONF_SERVERS: ["192.168.1.1", "pool.ntp.org"],
+                },
+                {
+                    CONF_PLATFORM: CONF_SNTP,
+                    CONF_ID: ID("sntp_time_2", is_manual=False),
+                    CONF_SERVERS: ["192.168.1.2"],
+                },
+            ],
+            1,
+            ["192.168.1.1", "pool.ntp.org", "192.168.1.2"],
+            ["Found and merged 2 SNTP time configurations into one instance"],
+            id="two_instances_merged",
+        ),
+        pytest.param(
+            [
+                {
+                    CONF_PLATFORM: CONF_SNTP,
+                    CONF_ID: ID("sntp_time_1", is_manual=False),
+                    CONF_SERVERS: ["192.168.1.1", "pool.ntp.org"],
+                },
+                {
+                    CONF_PLATFORM: CONF_SNTP,
+                    CONF_ID: ID("sntp_time_2", is_manual=False),
+                    CONF_SERVERS: ["pool.ntp.org", "192.168.1.2"],
+                },
+            ],
+            1,
+            ["192.168.1.1", "pool.ntp.org", "192.168.1.2"],
+            ["Found and merged 2 SNTP time configurations into one instance"],
+            id="deduplication_preserves_order",
+        ),
+        pytest.param(
+            [
+                {
+                    CONF_PLATFORM: CONF_SNTP,
+                    CONF_ID: ID("sntp_time_1", is_manual=False),
+                    CONF_SERVERS: ["192.168.1.1", "pool.ntp.org"],
+                },
+                {
+                    CONF_PLATFORM: CONF_SNTP,
+                    CONF_ID: ID("sntp_time_2", is_manual=False),
+                    CONF_SERVERS: ["192.168.1.2", "pool2.ntp.org"],
+                },
+                {
+                    CONF_PLATFORM: CONF_SNTP,
+                    CONF_ID: ID("sntp_time_3", is_manual=False),
+                    CONF_SERVERS: ["pool3.ntp.org"],
+                },
+            ],
+            1,
+            ["192.168.1.1", "pool.ntp.org", "192.168.1.2"],
+            [
+                "SNTP supports maximum 3 servers. Dropped excess server(s): ['pool2.ntp.org', 'pool3.ntp.org']",
+                "Found and merged 3 SNTP time configurations into one instance",
+            ],
+            id="three_instances_drops_excess_servers",
+        ),
+        pytest.param(
+            [
+                {
+                    CONF_PLATFORM: CONF_SNTP,
+                    CONF_ID: ID("sntp_time_1", is_manual=False),
+                    CONF_SERVERS: [
+                        "192.168.1.1",
+                        "pool.ntp.org",
+                        "pool.ntp.org",
+                        "192.168.1.1",
+                    ],
+                },
+                {
+                    CONF_PLATFORM: CONF_SNTP,
+                    CONF_ID: ID("sntp_time_2", is_manual=False),
+                    CONF_SERVERS: ["pool.ntp.org", "192.168.1.2"],
+                },
+            ],
+            1,
+            ["192.168.1.1", "pool.ntp.org", "192.168.1.2"],
+            ["Found and merged 2 SNTP time configurations into one instance"],
+            id="deduplication_multiple_duplicates",
+        ),
+    ],
+)
+def test_sntp_instance_merging(
+    time_configs: list[dict[str, Any]],
+    expected_count: int,
+    expected_servers: list[str],
+    warning_messages: list[str],
+    caplog: pytest.LogCaptureFixture,
+) -> None:
+    """Test SNTP instance merging behavior."""
+    # Create a mock full config with time configs
+    full_conf = {CONF_TIME: time_configs.copy()}
+
+    # Set the context var
+    token = fv.full_config.set(full_conf)
+    try:
+        with caplog.at_level(logging.WARNING):
+            _sntp_final_validate({})
+
+        # Get the updated config
+        updated_conf = fv.full_config.get()
+
+        # Check if merging occurred
+        if len(time_configs) > 1:
+            # Verify only one SNTP instance remains
+            sntp_instances = [
+                tc
+                for tc in updated_conf[CONF_TIME]
+                if tc.get(CONF_PLATFORM) == CONF_SNTP
+            ]
+            assert len(sntp_instances) == expected_count
+
+            # Verify server list
+            assert sntp_instances[0][CONF_SERVERS] == expected_servers
+
+            # Verify warnings
+            for expected_msg in warning_messages:
+                assert any(
+                    expected_msg in record.message for record in caplog.records
+                ), f"Expected warning message '{expected_msg}' not found in log"
+        else:
+            # Single instance should not trigger merging or warnings
+            assert len(caplog.records) == 0
+            # Config should be unchanged
+            assert updated_conf[CONF_TIME] == time_configs
+    finally:
+        fv.full_config.reset(token)
+
+
+def test_sntp_inconsistent_manual_ids() -> None:
+    """Test that inconsistent manual IDs raise an error."""
+    # Create configs with manual IDs that are inconsistent
+    time_configs = [
+        {
+            CONF_PLATFORM: CONF_SNTP,
+            CONF_ID: ID("sntp_time_1", is_manual=True),
+            CONF_SERVERS: ["192.168.1.1"],
+        },
+        {
+            CONF_PLATFORM: CONF_SNTP,
+            CONF_ID: ID("sntp_time_2", is_manual=True),
+            CONF_SERVERS: ["192.168.1.2"],
+        },
+    ]
+
+    full_conf = {CONF_TIME: time_configs}
+
+    token = fv.full_config.set(full_conf)
+    try:
+        with pytest.raises(
+            cv.Invalid,
+            match="Found multiple SNTP configurations but id is inconsistent",
+        ):
+            _sntp_final_validate({})
+    finally:
+        fv.full_config.reset(token)
+
+
+def test_sntp_with_other_time_platforms(caplog: pytest.LogCaptureFixture) -> None:
+    """Test that SNTP merging doesn't affect other time platforms."""
+    time_configs = [
+        {
+            CONF_PLATFORM: CONF_SNTP,
+            CONF_ID: ID("sntp_time_1", is_manual=False),
+            CONF_SERVERS: ["192.168.1.1"],
+        },
+        {
+            CONF_PLATFORM: "homeassistant",
+            CONF_ID: ID("homeassistant_time", is_manual=False),
+        },
+        {
+            CONF_PLATFORM: CONF_SNTP,
+            CONF_ID: ID("sntp_time_2", is_manual=False),
+            CONF_SERVERS: ["192.168.1.2"],
+        },
+    ]
+
+    full_conf = {CONF_TIME: time_configs.copy()}
+
+    token = fv.full_config.set(full_conf)
+    try:
+        with caplog.at_level(logging.WARNING):
+            _sntp_final_validate({})
+
+        updated_conf = fv.full_config.get()
+
+        # Should have 2 time platforms: 1 merged SNTP + 1 homeassistant
+        assert len(updated_conf[CONF_TIME]) == 2
+
+        # Find the platforms
+        platforms = {tc[CONF_PLATFORM] for tc in updated_conf[CONF_TIME]}
+        assert platforms == {CONF_SNTP, "homeassistant"}
+
+        # Verify SNTP was merged
+        sntp_instances = [
+            tc for tc in updated_conf[CONF_TIME] if tc[CONF_PLATFORM] == CONF_SNTP
+        ]
+        assert len(sntp_instances) == 1
+        assert sntp_instances[0][CONF_SERVERS] == ["192.168.1.1", "192.168.1.2"]
+    finally:
+        fv.full_config.reset(token)

From 3fd58f1a917f3d69af101a544f2688d70ec69228 Mon Sep 17 00:00:00 2001
From: "J. Nick Koston" <nick@koston.org>
Date: Sun, 16 Nov 2025 18:38:52 -0600
Subject: [PATCH 17/23] [web_server.ota] Merge multiple instances to prevent
 undefined behavior (#11905)

---
 esphome/components/web_server/ota/__init__.py |  58 ++++++-
 .../ota/test_web_server_ota.py                | 153 ++++++++++++++++++
 2 files changed, 210 insertions(+), 1 deletion(-)

diff --git a/esphome/components/web_server/ota/__init__.py b/esphome/components/web_server/ota/__init__.py
index 4a98db8877..260e6aea6d 100644
--- a/esphome/components/web_server/ota/__init__.py
+++ b/esphome/components/web_server/ota/__init__.py
@@ -1,10 +1,17 @@
+import logging
+
 import esphome.codegen as cg
 from esphome.components.esp32 import add_idf_component
 from esphome.components.ota import BASE_OTA_SCHEMA, OTAComponent, ota_to_code
+from esphome.config_helpers import merge_config
 import esphome.config_validation as cv
-from esphome.const import CONF_ID
+from esphome.const import CONF_ID, CONF_OTA, CONF_PLATFORM, CONF_WEB_SERVER
 from esphome.core import CORE, coroutine_with_priority
 from esphome.coroutine import CoroPriority
+import esphome.final_validate as fv
+from esphome.types import ConfigType
+
+_LOGGER = logging.getLogger(__name__)
 
 CODEOWNERS = ["@esphome/core"]
 DEPENDENCIES = ["network", "web_server_base"]
@@ -12,6 +19,53 @@ DEPENDENCIES = ["network", "web_server_base"]
 web_server_ns = cg.esphome_ns.namespace("web_server")
 WebServerOTAComponent = web_server_ns.class_("WebServerOTAComponent", OTAComponent)
 
+
+def _web_server_ota_final_validate(config: ConfigType) -> None:
+    """Merge multiple web_server OTA instances into one.
+
+    Multiple web_server OTA instances register duplicate HTTP handlers for /update,
+    causing undefined behavior. Merge them into a single instance.
+    """
+    full_conf = fv.full_config.get()
+    ota_confs = full_conf.get(CONF_OTA, [])
+
+    web_server_ota_configs: list[ConfigType] = []
+    other_ota_configs: list[ConfigType] = []
+
+    for ota_conf in ota_confs:
+        if ota_conf.get(CONF_PLATFORM) == CONF_WEB_SERVER:
+            web_server_ota_configs.append(ota_conf)
+        else:
+            other_ota_configs.append(ota_conf)
+
+    if len(web_server_ota_configs) <= 1:
+        return
+
+    # Merge all web_server OTA configs into the first one
+    merged = web_server_ota_configs[0]
+    for ota_conf in web_server_ota_configs[1:]:
+        # Validate that IDs are consistent if manually specified
+        if (
+            merged[CONF_ID].is_manual
+            and ota_conf[CONF_ID].is_manual
+            and merged[CONF_ID] != ota_conf[CONF_ID]
+        ):
+            raise cv.Invalid(
+                f"Found multiple web_server OTA configurations but {CONF_ID} is inconsistent"
+            )
+        merged = merge_config(merged, ota_conf)
+
+    _LOGGER.warning(
+        "Found and merged %d web_server OTA configurations into one instance",
+        len(web_server_ota_configs),
+    )
+
+    # Replace OTA configs with merged web_server + other OTA platforms
+    other_ota_configs.append(merged)
+    full_conf[CONF_OTA] = other_ota_configs
+    fv.full_config.set(full_conf)
+
+
 CONFIG_SCHEMA = (
     cv.Schema(
         {
@@ -22,6 +76,8 @@ CONFIG_SCHEMA = (
     .extend(cv.COMPONENT_SCHEMA)
 )
 
+FINAL_VALIDATE_SCHEMA = _web_server_ota_final_validate
+
 
 @coroutine_with_priority(CoroPriority.WEB_SERVER_OTA)
 async def to_code(config):
diff --git a/tests/component_tests/ota/test_web_server_ota.py b/tests/component_tests/ota/test_web_server_ota.py
index 0d8ff6f134..794eaac9be 100644
--- a/tests/component_tests/ota/test_web_server_ota.py
+++ b/tests/component_tests/ota/test_web_server_ota.py
@@ -1,6 +1,18 @@
 """Tests for the web_server OTA platform."""
 
+from __future__ import annotations
+
 from collections.abc import Callable
+import logging
+from typing import Any
+
+import pytest
+
+from esphome import config_validation as cv
+from esphome.components.web_server.ota import _web_server_ota_final_validate
+from esphome.const import CONF_ID, CONF_OTA, CONF_PLATFORM, CONF_WEB_SERVER
+from esphome.core import ID
+import esphome.final_validate as fv
 
 
 def test_web_server_ota_generated(generate_main: Callable[[str], str]) -> None:
@@ -100,3 +112,144 @@ def test_web_server_ota_esp8266(generate_main: Callable[[str], str]) -> None:
     # Check web server OTA component is present
     assert "WebServerOTAComponent" in main_cpp
     assert "web_server::WebServerOTAComponent" in main_cpp
+
+
+@pytest.mark.parametrize(
+    ("ota_configs", "expected_count", "warning_expected"),
+    [
+        pytest.param(
+            [
+                {
+                    CONF_PLATFORM: CONF_WEB_SERVER,
+                    CONF_ID: ID("ota_web", is_manual=False),
+                }
+            ],
+            1,
+            False,
+            id="single_instance_no_merge",
+        ),
+        pytest.param(
+            [
+                {
+                    CONF_PLATFORM: CONF_WEB_SERVER,
+                    CONF_ID: ID("ota_web_1", is_manual=False),
+                },
+                {
+                    CONF_PLATFORM: CONF_WEB_SERVER,
+                    CONF_ID: ID("ota_web_2", is_manual=False),
+                },
+            ],
+            1,
+            True,
+            id="two_instances_merged",
+        ),
+        pytest.param(
+            [
+                {
+                    CONF_PLATFORM: CONF_WEB_SERVER,
+                    CONF_ID: ID("ota_web_1", is_manual=False),
+                },
+                {
+                    CONF_PLATFORM: "esphome",
+                    CONF_ID: ID("ota_esphome", is_manual=False),
+                },
+                {
+                    CONF_PLATFORM: CONF_WEB_SERVER,
+                    CONF_ID: ID("ota_web_2", is_manual=False),
+                },
+            ],
+            2,
+            True,
+            id="mixed_platforms_web_server_merged",
+        ),
+    ],
+)
+def test_web_server_ota_instance_merging(
+    ota_configs: list[dict[str, Any]],
+    expected_count: int,
+    warning_expected: bool,
+    caplog: pytest.LogCaptureFixture,
+) -> None:
+    """Test web_server OTA instance merging behavior."""
+    full_conf = {CONF_OTA: ota_configs.copy()}
+
+    token = fv.full_config.set(full_conf)
+    try:
+        with caplog.at_level(logging.WARNING):
+            _web_server_ota_final_validate({})
+
+        updated_conf = fv.full_config.get()
+
+        # Verify total number of OTA platforms
+        assert len(updated_conf[CONF_OTA]) == expected_count
+
+        # Verify warning
+        if warning_expected:
+            assert any(
+                "Found and merged" in record.message
+                and "web_server OTA" in record.message
+                for record in caplog.records
+            ), "Expected merge warning not found in log"
+        else:
+            assert len(caplog.records) == 0, "Unexpected warnings logged"
+    finally:
+        fv.full_config.reset(token)
+
+
+def test_web_server_ota_consistent_manual_ids(
+    caplog: pytest.LogCaptureFixture,
+) -> None:
+    """Test that consistent manual IDs can be merged successfully."""
+    ota_configs = [
+        {
+            CONF_PLATFORM: CONF_WEB_SERVER,
+            CONF_ID: ID("ota_web", is_manual=True),
+        },
+        {
+            CONF_PLATFORM: CONF_WEB_SERVER,
+            CONF_ID: ID("ota_web", is_manual=True),
+        },
+    ]
+
+    full_conf = {CONF_OTA: ota_configs}
+
+    token = fv.full_config.set(full_conf)
+    try:
+        with caplog.at_level(logging.WARNING):
+            _web_server_ota_final_validate({})
+
+        updated_conf = fv.full_config.get()
+        assert len(updated_conf[CONF_OTA]) == 1
+        assert updated_conf[CONF_OTA][0][CONF_ID].id == "ota_web"
+        assert any(
+            "Found and merged" in record.message and "web_server OTA" in record.message
+            for record in caplog.records
+        )
+    finally:
+        fv.full_config.reset(token)
+
+
+def test_web_server_ota_inconsistent_manual_ids() -> None:
+    """Test that inconsistent manual IDs raise an error."""
+    ota_configs = [
+        {
+            CONF_PLATFORM: CONF_WEB_SERVER,
+            CONF_ID: ID("ota_web_1", is_manual=True),
+        },
+        {
+            CONF_PLATFORM: CONF_WEB_SERVER,
+            CONF_ID: ID("ota_web_2", is_manual=True),
+        },
+    ]
+
+    full_conf = {CONF_OTA: ota_configs}
+
+    token = fv.full_config.set(full_conf)
+    try:
+        with pytest.raises(
+            cv.Invalid,
+            match="Found multiple web_server OTA configurations but id is inconsistent",
+        ):
+            _web_server_ota_final_validate({})
+    finally:
+        fv.full_config.reset(token)

From 9e02e3191798010befd85006f17ebebc4a03b360 Mon Sep 17 00:00:00 2001
From: "J. Nick Koston" <nick@koston.org>
Date: Sun, 16 Nov 2025 18:39:01 -0600
Subject: [PATCH 18/23] [web_server_idf] Fix lwIP assertion crash by shutting
 down sockets on connection close (#11937)

---
 .../components/web_server_idf/web_server_idf.cpp | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/esphome/components/web_server_idf/web_server_idf.cpp b/esphome/components/web_server_idf/web_server_idf.cpp
index 0dab5e7e8c..ce91569de2 100644
--- a/esphome/components/web_server_idf/web_server_idf.cpp
+++ b/esphome/components/web_server_idf/web_server_idf.cpp
@@ -489,10 +489,18 @@ AsyncEventSourceResponse::AsyncEventSourceResponse(const AsyncWebServerRequest *
 
 void AsyncEventSourceResponse::destroy(void *ptr) {
   auto *rsp = static_cast<AsyncEventSourceResponse *>(ptr);
-  ESP_LOGD(TAG, "Event source connection closed (fd: %d)", rsp->fd_.load());
-  // Mark as dead by setting fd to 0 - will be cleaned up in the main loop
-  rsp->fd_.store(0);
-  // Note: We don't delete or remove from set here to avoid race conditions
+  int fd = rsp->fd_.exchange(0);  // Atomically get and clear fd
+
+  if (fd > 0) {
+    ESP_LOGD(TAG, "Event source connection closed (fd: %d)", fd);
+    // Immediately shut down the socket to prevent lwIP from delivering more data
+    // This prevents "recv_tcp: recv for wrong pcb!" assertions when the TCP stack
+    // tries to deliver queued data after the session is marked as dead
+    // See: https://github.com/esphome/esphome/issues/11936
+    shutdown(fd, SHUT_RDWR);
+    // Note: We don't close() the socket - httpd owns it and will close it
+  }
+  // Session will be cleaned up in the main loop to avoid race conditions
 }
 
 // helper for allowing only unique entries in the queue

From 6c6b03bda05a32519b0690e11b12706f1e2df24d Mon Sep 17 00:00:00 2001
From: Anton Sergunov <setosha@gmail.com>
Date: Mon, 17 Nov 2025 07:25:00 +0600
Subject: [PATCH 19/23] [uart] Setup uart pins only if flags are set (#11914)

Co-authored-by: J. Nick Koston <nick+github@koston.org>
---
 .../components/uart/uart_component_esp8266.cpp | 18 +++++++++++++-----
 .../components/uart/uart_component_esp_idf.cpp | 18 +++++++++++++-----
 .../uart/uart_component_libretiny.cpp          |  2 +-
 .../components/uart/uart_component_rp2040.cpp  | 18 +++++++++++++-----
 4 files changed, 40 insertions(+), 16 deletions(-)

diff --git a/esphome/components/uart/uart_component_esp8266.cpp b/esphome/components/uart/uart_component_esp8266.cpp
index 7a453dbb50..c84a877ef4 100644
--- a/esphome/components/uart/uart_component_esp8266.cpp
+++ b/esphome/components/uart/uart_component_esp8266.cpp
@@ -56,11 +56,19 @@ uint32_t ESP8266UartComponent::get_config() {
 }
 
 void ESP8266UartComponent::setup() {
-  if (this->rx_pin_) {
-    this->rx_pin_->setup();
-  }
-  if (this->tx_pin_ && this->rx_pin_ != this->tx_pin_) {
-    this->tx_pin_->setup();
+  auto setup_pin_if_needed = [](InternalGPIOPin *pin) {
+    if (!pin) {
+      return;
+    }
+    const auto mask = gpio::Flags::FLAG_OPEN_DRAIN | gpio::Flags::FLAG_PULLUP | gpio::Flags::FLAG_PULLDOWN;
+    if ((pin->get_flags() & mask) != gpio::Flags::FLAG_NONE) {
+      pin->setup();
+    }
+  };
+
+  setup_pin_if_needed(this->rx_pin_);
+  if (this->rx_pin_ != this->tx_pin_) {
+    setup_pin_if_needed(this->tx_pin_);
   }
 
   // Use Arduino HardwareSerial UARTs if all used pins match the ones
diff --git a/esphome/components/uart/uart_component_esp_idf.cpp b/esphome/components/uart/uart_component_esp_idf.cpp
index 70a13c9e37..61ca8c1c0c 100644
--- a/esphome/components/uart/uart_component_esp_idf.cpp
+++ b/esphome/components/uart/uart_component_esp_idf.cpp
@@ -133,11 +133,19 @@ void IDFUARTComponent::load_settings(bool dump_config) {
     return;
   }
 
-  if (this->rx_pin_) {
-    this->rx_pin_->setup();
-  }
-  if (this->tx_pin_ && this->rx_pin_ != this->tx_pin_) {
-    this->tx_pin_->setup();
+  auto setup_pin_if_needed = [](InternalGPIOPin *pin) {
+    if (!pin) {
+      return;
+    }
+    const auto mask = gpio::Flags::FLAG_OPEN_DRAIN | gpio::Flags::FLAG_PULLUP | gpio::Flags::FLAG_PULLDOWN;
+    if ((pin->get_flags() & mask) != gpio::Flags::FLAG_NONE) {
+      pin->setup();
+    }
+  };
+
+  setup_pin_if_needed(this->rx_pin_);
+  if (this->rx_pin_ != this->tx_pin_) {
+    setup_pin_if_needed(this->tx_pin_);
   }
 
   int8_t tx = this->tx_pin_ != nullptr ? this->tx_pin_->get_pin() : -1;
diff --git a/esphome/components/uart/uart_component_libretiny.cpp b/esphome/components/uart/uart_component_libretiny.cpp
index 8d1d28fce4..1e408b169b 100644
--- a/esphome/components/uart/uart_component_libretiny.cpp
+++ b/esphome/components/uart/uart_component_libretiny.cpp
@@ -53,7 +53,7 @@ void LibreTinyUARTComponent::setup() {
 
   auto shouldFallbackToSoftwareSerial = [&]() -> bool {
     auto hasFlags = [](InternalGPIOPin *pin, const gpio::Flags mask) -> bool {
-      return pin && pin->get_flags() & mask != gpio::Flags::FLAG_NONE;
+      return pin && (pin->get_flags() & mask) != gpio::Flags::FLAG_NONE;
     };
     if (hasFlags(this->tx_pin_, gpio::Flags::FLAG_OPEN_DRAIN | gpio::Flags::FLAG_PULLUP | gpio::Flags::FLAG_PULLDOWN) ||
         hasFlags(this->rx_pin_, gpio::Flags::FLAG_OPEN_DRAIN | gpio::Flags::FLAG_PULLUP | gpio::Flags::FLAG_PULLDOWN)) {
diff --git a/esphome/components/uart/uart_component_rp2040.cpp b/esphome/components/uart/uart_component_rp2040.cpp
index c78691653d..cd3905b5c1 100644
--- a/esphome/components/uart/uart_component_rp2040.cpp
+++ b/esphome/components/uart/uart_component_rp2040.cpp
@@ -52,11 +52,19 @@ uint16_t RP2040UartComponent::get_config() {
 }
 
 void RP2040UartComponent::setup() {
-  if (this->rx_pin_) {
-    this->rx_pin_->setup();
-  }
-  if (this->tx_pin_ && this->rx_pin_ != this->tx_pin_) {
-    this->tx_pin_->setup();
+  auto setup_pin_if_needed = [](InternalGPIOPin *pin) {
+    if (!pin) {
+      return;
+    }
+    const auto mask = gpio::Flags::FLAG_OPEN_DRAIN | gpio::Flags::FLAG_PULLUP | gpio::Flags::FLAG_PULLDOWN;
+    if ((pin->get_flags() & mask) != gpio::Flags::FLAG_NONE) {
+      pin->setup();
+    }
+  };
+
+  setup_pin_if_needed(this->rx_pin_);
+  if (this->rx_pin_ != this->tx_pin_) {
+    setup_pin_if_needed(this->tx_pin_);
   }
 
   uint16_t config = get_config();

From a38c4e0c6e4c4e4bf960db6f1e75f74afdfcb574 Mon Sep 17 00:00:00 2001
From: Jesse Hills <3060199+jesserockz@users.noreply.github.com>
Date: Mon, 17 Nov 2025 15:32:09 +1300
Subject: [PATCH 20/23] Bump version to 2025.11.0b3

---
 Doxyfile         | 2 +-
 esphome/const.py | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/Doxyfile b/Doxyfile
index 8766b8f00c..04046d9ce6 100644
--- a/Doxyfile
+++ b/Doxyfile
@@ -48,7 +48,7 @@ PROJECT_NAME           = ESPHome
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER         = 2025.11.0b2
+PROJECT_NUMBER         = 2025.11.0b3
 
 # Using the PROJECT_BRIEF tag one can provide an optional one line description
 # for a project that appears at the top of each page and should give viewer a
diff --git a/esphome/const.py b/esphome/const.py
index 8c6020a868..2ca0018fdb 100644
--- a/esphome/const.py
+++ b/esphome/const.py
@@ -4,7 +4,7 @@ from enum import Enum
 
 from esphome.enum import StrEnum
 
-__version__ = "2025.11.0b2"
+__version__ = "2025.11.0b3"
 
 ALLOWED_NAME_CHARS = "abcdefghijklmnopqrstuvwxyz0123456789-_"
 VALID_SUBSTITUTIONS_CHARACTERS = (

From 10bdb47eae14bd3fd1cd761737b0633cd9c9894b Mon Sep 17 00:00:00 2001
From: "J. Nick Koston" <nick@koston.org>
Date: Sun, 16 Nov 2025 20:37:06 -0600
Subject: [PATCH 21/23] [cover] Modernize to C++17 nested namespaces (#11935)

---
 esphome/components/cover/automation.h   | 6 ++----
 esphome/components/cover/cover.cpp      | 6 ++----
 esphome/components/cover/cover.h        | 6 ++----
 esphome/components/cover/cover_traits.h | 6 ++----
 4 files changed, 8 insertions(+), 16 deletions(-)

diff --git a/esphome/components/cover/automation.h b/esphome/components/cover/automation.h
index 752e0398c1..c0345a7cc6 100644
--- a/esphome/components/cover/automation.h
+++ b/esphome/components/cover/automation.h
@@ -4,8 +4,7 @@
 #include "esphome/core/automation.h"
 #include "cover.h"
 
-namespace esphome {
-namespace cover {
+namespace esphome::cover {
 
 template<typename... Ts> class OpenAction : public Action<Ts...> {
  public:
@@ -131,5 +130,4 @@ class CoverClosedTrigger : public Trigger<> {
   }
 };
 
-}  // namespace cover
-}  // namespace esphome
+}  // namespace esphome::cover
diff --git a/esphome/components/cover/cover.cpp b/esphome/components/cover/cover.cpp
index 3062dba28a..8f735982f1 100644
--- a/esphome/components/cover/cover.cpp
+++ b/esphome/components/cover/cover.cpp
@@ -6,8 +6,7 @@
 
 #include "esphome/core/log.h"
 
-namespace esphome {
-namespace cover {
+namespace esphome::cover {
 
 static const char *const TAG = "cover";
 
@@ -212,5 +211,4 @@ void CoverRestoreState::apply(Cover *cover) {
   cover->publish_state();
 }
 
-}  // namespace cover
-}  // namespace esphome
+}  // namespace esphome::cover
diff --git a/esphome/components/cover/cover.h b/esphome/components/cover/cover.h
index d5db6cfb4f..6c69c05e71 100644
--- a/esphome/components/cover/cover.h
+++ b/esphome/components/cover/cover.h
@@ -7,8 +7,7 @@
 
 #include "cover_traits.h"
 
-namespace esphome {
-namespace cover {
+namespace esphome::cover {
 
 const extern float COVER_OPEN;
 const extern float COVER_CLOSED;
@@ -157,5 +156,4 @@ class Cover : public EntityBase, public EntityBase_DeviceClass {
   ESPPreferenceObject rtc_;
 };
 
-}  // namespace cover
-}  // namespace esphome
+}  // namespace esphome::cover
diff --git a/esphome/components/cover/cover_traits.h b/esphome/components/cover/cover_traits.h
index 79001c3b03..723516318b 100644
--- a/esphome/components/cover/cover_traits.h
+++ b/esphome/components/cover/cover_traits.h
@@ -1,7 +1,6 @@
 #pragma once
 
-namespace esphome {
-namespace cover {
+namespace esphome::cover {
 
 class CoverTraits {
  public:
@@ -26,5 +25,4 @@ class CoverTraits {
   bool supports_stop_{false};
 };
 
-}  // namespace cover
-}  // namespace esphome
+}  // namespace esphome::cover

From 9e1f8d83f884b8fb9c168c1ea3909ef3fc365c21 Mon Sep 17 00:00:00 2001
From: Javier Peletier <jpeletier@users.noreply.github.com>
Date: Mon, 17 Nov 2025 08:03:11 +0100
Subject: [PATCH 22/23] [config] Support !remove and !extend with LVGL-style
 configs (#11534)

---
 esphome/config.py                             | 59 +++++++++++--------
 .../05-extend-remove.approved.yaml            | 24 ++++++++
 .../substitutions/05-extend-remove.input.yaml | 44 ++++++++++++++
 3 files changed, 104 insertions(+), 23 deletions(-)

diff --git a/esphome/config.py b/esphome/config.py
index e508ca585b..4c8019de75 100644
--- a/esphome/config.py
+++ b/esphome/config.py
@@ -338,21 +338,44 @@ def check_replaceme(value):
         )
 
 
-def _build_list_index(lst):
+def _get_item_id(item: Any) -> str | Extend | Remove | None:
+    """Attempts to get a list item's ID"""
+    if not isinstance(item, dict):
+        return None  # not a dict, can't have ID
+    # 1.- Check regular case:
+    # - id: my_id
+    item_id = item.get(CONF_ID)
+    if item_id is None and len(item) == 1:
+        # 2.- Check single-key dict case:
+        # - obj:
+        #     id: my_id
+        item = next(iter(item.values()))
+        if isinstance(item, dict):
+            item_id = item.get(CONF_ID)
+    if isinstance(item_id, Extend):
+        # Remove instances of Extend so they don't overwrite the original item when merging:
+        del item[CONF_ID]
+    return item_id
+
+
+def _build_list_index(
+    lst: list[Any],
+) -> tuple[
+    OrderedDict[str | Extend | Remove, Any], list[tuple[int, str, Any]], set[str]
+]:
     index = OrderedDict()
     extensions, removals = [], set()
-    for item in lst:
+    for pos, item in enumerate(lst):
         if item is None:
             removals.add(None)
             continue
-        item_id = None
-        if isinstance(item, dict) and (item_id := item.get(CONF_ID)):
-            if isinstance(item_id, Extend):
-                extensions.append(item)
-                continue
-            if isinstance(item_id, Remove):
-                removals.add(item_id.value)
-                continue
+        item_id = _get_item_id(item)
+        if isinstance(item_id, Extend):
+            extensions.append((pos, item_id.value, item))
+            continue
+        if isinstance(item_id, Remove):
+            removals.add(item_id.value)
+            continue
         if not item_id or item_id in index:
             # no id or duplicate -> pass through with identity-based key
             item_id = id(item)
@@ -360,7 +383,7 @@ def _build_list_index(lst):
     return index, extensions, removals
 
 
-def resolve_extend_remove(value, is_key=None):
+def resolve_extend_remove(value: Any, is_key: bool = False) -> None:
     if isinstance(value, ESPLiteralValue):
         return  # do not check inside literal blocks
     if isinstance(value, list):
@@ -368,26 +391,16 @@ def resolve_extend_remove(value, is_key=None):
         if extensions or removals:
             # Rebuild the original list after
             # processing all extensions and removals
-            for item in extensions:
-                item_id = item[CONF_ID].value
+            for pos, item_id, item in extensions:
                 if item_id in removals:
                     continue
                 old = index.get(item_id)
                 if old is None:
                     # Failed to find source for extension
-                    # Find index of item to show error at correct position
-                    i = next(
-                        (
-                            i
-                            for i, d in enumerate(value)
-                            if d.get(CONF_ID) == item[CONF_ID]
-                        )
-                    )
-                    with cv.prepend_path(i):
+                    with cv.prepend_path(pos):
                         raise cv.Invalid(
                             f"Source for extension of ID '{item_id}' was not found."
                         )
-                item[CONF_ID] = item_id
                 index[item_id] = merge_config(old, item)
             for item_id in removals:
                 index.pop(item_id, None)
diff --git a/tests/unit_tests/fixtures/substitutions/05-extend-remove.approved.yaml b/tests/unit_tests/fixtures/substitutions/05-extend-remove.approved.yaml
index a479370f4b..35e3e6258f 100644
--- a/tests/unit_tests/fixtures/substitutions/05-extend-remove.approved.yaml
+++ b/tests/unit_tests/fixtures/substitutions/05-extend-remove.approved.yaml
@@ -7,3 +7,27 @@ some_component:
     value: 2
   - id: component2
     value: 5
+lvgl:
+  pages:
+    - id: page1
+      widgets:
+        - obj:
+            id: object1
+            x: 3
+            y: 2
+            width: 4
+        - obj:
+            id: object3
+            x: 6
+            y: 12
+            widgets:
+              - obj:
+                  id: object4
+                  x: 14
+                  y: 9
+                  width: 15
+            height: 13
+        - obj:
+            id: object5
+            x: 10
+            y: 11
diff --git a/tests/unit_tests/fixtures/substitutions/05-extend-remove.input.yaml b/tests/unit_tests/fixtures/substitutions/05-extend-remove.input.yaml
index 2e0e60798d..617f09c31c 100644
--- a/tests/unit_tests/fixtures/substitutions/05-extend-remove.input.yaml
+++ b/tests/unit_tests/fixtures/substitutions/05-extend-remove.input.yaml
@@ -13,6 +13,30 @@ packages:
         value: 5
       - id: component3
         value: 6
+  - lvgl:
+      pages:
+        - id: page1
+          widgets:
+            - obj:
+                id: object1
+                x: 1
+                y: 2
+            - obj:
+                id: object2
+                x: 5
+            - obj:
+                id: object3
+                x: 6
+                y: 7
+                widgets:
+                  - obj:
+                      id: object4
+                      x: 8
+                      y: 9
+            - obj:
+                id: object5
+                x: 10
+                y: 11
 
 some_component:
   - id: !extend ${A}
@@ -20,3 +44,23 @@ some_component:
   - id: component2
     value: 3
   - id: !remove ${C}
+
+lvgl:
+  pages:
+    - id: !extend page1
+      widgets:
+        - obj:
+            id: !extend object1
+            x: 3
+            width: 4
+        - obj:
+            id: !remove object2
+        - obj:
+            id: !extend object3
+            y: 12
+            height: 13
+            widgets:
+              - obj:
+                  id: !extend object4
+                  x: 14
+                  width: 15

From 3d6c361037098f2a7990d1c41c0b4b50788afb64 Mon Sep 17 00:00:00 2001
From: Jonathan Swoboda <154711427+swoboda1337@users.noreply.github.com>
Date: Mon, 17 Nov 2025 12:32:08 -0500
Subject: [PATCH 23/23] [core] Add support for setting environment variables
 (#11953)

---
 esphome/const.py                     |  1 +
 esphome/core/config.py               | 15 +++++++++++++++
 tests/components/esphome/common.yaml |  3 +++
 3 files changed, 19 insertions(+)

diff --git a/esphome/const.py b/esphome/const.py
index a25114d80e..b4cd3cfd1c 100644
--- a/esphome/const.py
+++ b/esphome/const.py
@@ -336,6 +336,7 @@ CONF_ENERGY = "energy"
 CONF_ENTITY_CATEGORY = "entity_category"
 CONF_ENTITY_ID = "entity_id"
 CONF_ENUM_DATAPOINT = "enum_datapoint"
+CONF_ENVIRONMENT_VARIABLES = "environment_variables"
 CONF_EQUATION = "equation"
 CONF_ESP8266_DISABLE_SSL_SUPPORT = "esp8266_disable_ssl_support"
 CONF_ESPHOME = "esphome"
diff --git a/esphome/core/config.py b/esphome/core/config.py
index 763f9ebd9f..0a239c5f5e 100644
--- a/esphome/core/config.py
+++ b/esphome/core/config.py
@@ -17,6 +17,7 @@ from esphome.const import (
     CONF_COMPILE_PROCESS_LIMIT,
     CONF_DEBUG_SCHEDULER,
     CONF_DEVICES,
+    CONF_ENVIRONMENT_VARIABLES,
     CONF_ESPHOME,
     CONF_FRIENDLY_NAME,
     CONF_ID,
@@ -215,6 +216,11 @@ CONFIG_SCHEMA = cv.All(
                     cv.string_strict: cv.Any([cv.string], cv.string),
                 }
             ),
+            cv.Optional(CONF_ENVIRONMENT_VARIABLES, default={}): cv.Schema(
+                {
+                    cv.string_strict: cv.string,
+                }
+            ),
             cv.Optional(CONF_ON_BOOT): automation.validate_automation(
                 {
                     cv.GenerateID(CONF_TRIGGER_ID): cv.declare_id(StartupTrigger),
@@ -426,6 +432,12 @@ async def _add_platformio_options(pio_options):
         cg.add_platformio_option(key, val)
 
 
+@coroutine_with_priority(CoroPriority.FINAL)
+async def _add_environment_variables(env_vars: dict[str, str]) -> None:
+    # Set environment variables for the build process
+    os.environ.update(env_vars)
+
+
 @coroutine_with_priority(CoroPriority.AUTOMATION)
 async def _add_automations(config):
     for conf in config.get(CONF_ON_BOOT, []):
@@ -563,6 +575,9 @@ async def to_code(config: ConfigType) -> None:
     if config[CONF_PLATFORMIO_OPTIONS]:
         CORE.add_job(_add_platformio_options, config[CONF_PLATFORMIO_OPTIONS])
 
+    if config[CONF_ENVIRONMENT_VARIABLES]:
+        CORE.add_job(_add_environment_variables, config[CONF_ENVIRONMENT_VARIABLES])
+
     # Process areas
     all_areas: list[dict[str, str | core.ID]] = []
     if CONF_AREA in config:
diff --git a/tests/components/esphome/common.yaml b/tests/components/esphome/common.yaml
index b2d7bccaa5..db75b08b38 100644
--- a/tests/components/esphome/common.yaml
+++ b/tests/components/esphome/common.yaml
@@ -2,6 +2,9 @@ esphome:
   debug_scheduler: true
   platformio_options:
     board_build.flash_mode: dio
+  environment_variables:
+    TEST_ENV_VAR: "test_value"
+    BUILD_NUMBER: "12345"
   area:
     id: testing_area
     name: Testing Area