Merge branch 'dev' into proxy_memory

.pre-commit-config.yaml

@@ -4,7 +4,7 @@
 repos:
   - repo: https://github.com/astral-sh/ruff-pre-commit
     # Ruff version.
-    rev: v0.11.10
+    rev: v0.12.0
     hooks:
       # Run the linter.
       - id: ruff

CODEOWNERS

@@ -520,6 +520,7 @@ esphome/components/xiaomi_lywsd03mmc/* @ahpohl
 esphome/components/xiaomi_mhoc303/* @drug123
 esphome/components/xiaomi_mhoc401/* @vevsvevs
 esphome/components/xiaomi_rtcgq02lm/* @jesserockz
+esphome/components/xiaomi_xmwsdj04mmc/* @medusalix
 esphome/components/xl9535/* @mreditor97
 esphome/components/xpt2046/touchscreen/* @nielsnl68 @numo68
 esphome/components/xxtea/* @clydebarrow

esphome/components/anova/anova.cpp

@@ -17,7 +17,11 @@ void Anova::setup() {
   this->current_request_ = 0;
 }
 
-void Anova::loop() {}
+void Anova::loop() {
+  // Parent BLEClientNode has a loop() method, but this component uses
+  // polling via update() and BLE callbacks so loop isn't needed
+  this->disable_loop();
+}
 
 void Anova::control(const ClimateCall &call) {
   if (call.get_mode().has_value()) {

esphome/components/api/api.proto

@@ -1643,6 +1643,7 @@ enum VoiceAssistantEvent {
   VOICE_ASSISTANT_STT_VAD_END = 12;
   VOICE_ASSISTANT_TTS_STREAM_START = 98;
   VOICE_ASSISTANT_TTS_STREAM_END = 99;
+  VOICE_ASSISTANT_INTENT_PROGRESS = 100;
 }
 
 message VoiceAssistantEventData {

esphome/components/api/api_pb2.cpp

@@ -516,6 +516,8 @@ template<> const char *proto_enum_to_string<enums::VoiceAssistantEvent>(enums::V
       return "VOICE_ASSISTANT_TTS_STREAM_START";
     case enums::VOICE_ASSISTANT_TTS_STREAM_END:
       return "VOICE_ASSISTANT_TTS_STREAM_END";
+    case enums::VOICE_ASSISTANT_INTENT_PROGRESS:
+      return "VOICE_ASSISTANT_INTENT_PROGRESS";
     default:
       return "UNKNOWN";
   }

esphome/components/api/api_pb2.h

@@ -208,6 +208,7 @@ enum VoiceAssistantEvent : uint32_t {
   VOICE_ASSISTANT_STT_VAD_END = 12,
   VOICE_ASSISTANT_TTS_STREAM_START = 98,
   VOICE_ASSISTANT_TTS_STREAM_END = 99,
+  VOICE_ASSISTANT_INTENT_PROGRESS = 100,
 };
 enum VoiceAssistantTimerEvent : uint32_t {
   VOICE_ASSISTANT_TIMER_STARTED = 0,

esphome/components/async_tcp/__init__.py

@@ -21,8 +21,8 @@ CONFIG_SCHEMA = cv.All(
 @coroutine_with_priority(200.0)
 async def to_code(config):
     if CORE.is_esp32 or CORE.is_libretiny:
-        # https://github.com/esphome/AsyncTCP/blob/master/library.json
+        # https://github.com/ESP32Async/AsyncTCP
-        cg.add_library("esphome/AsyncTCP-esphome", "2.1.4")
+        cg.add_library("ESP32Async/AsyncTCP", "3.4.4")
     elif CORE.is_esp8266:
-        # https://github.com/esphome/ESPAsyncTCP
+        # https://github.com/ESP32Async/ESPAsyncTCP
-        cg.add_library("esphome/ESPAsyncTCP-esphome", "2.0.0")
+        cg.add_library("ESP32Async/ESPAsyncTCP", "2.0.0")

esphome/components/bedjet/bedjet_hub.cpp

@@ -480,7 +480,11 @@ void BedJetHub::set_clock(uint8_t hour, uint8_t minute) {
 
 /* Internal */
 
-void BedJetHub::loop() {}
+void BedJetHub::loop() {
+  // Parent BLEClientNode has a loop() method, but this component uses
+  // polling via update() and BLE callbacks so loop isn't needed
+  this->disable_loop();
+}
 void BedJetHub::update() { this->dispatch_status_(); }
 
 void BedJetHub::dump_config() {

esphome/components/bedjet/climate/bedjet_climate.cpp

@@ -83,7 +83,11 @@ void BedJetClimate::reset_state_() {
   this->publish_state();
 }
 
-void BedJetClimate::loop() {}
+void BedJetClimate::loop() {
+  // This component is controlled via the parent BedJetHub
+  // Empty loop not needed, disable to save CPU cycles
+  this->disable_loop();
+}
 
 void BedJetClimate::control(const ClimateCall &call) {
   ESP_LOGD(TAG, "Received BedJetClimate::control");

esphome/components/ble_client/sensor/ble_rssi_sensor.cpp

@@ -11,7 +11,11 @@ namespace ble_client {
 
 static const char *const TAG = "ble_rssi_sensor";
 
-void BLEClientRSSISensor::loop() {}
+void BLEClientRSSISensor::loop() {
+  // Parent BLEClientNode has a loop() method, but this component uses
+  // polling via update() and BLE GAP callbacks so loop isn't needed
+  this->disable_loop();
+}
 
 void BLEClientRSSISensor::dump_config() {
   LOG_SENSOR("", "BLE Client RSSI Sensor", this);

esphome/components/ble_client/sensor/ble_sensor.cpp

@@ -11,7 +11,11 @@ namespace ble_client {
 
 static const char *const TAG = "ble_sensor";
 
-void BLESensor::loop() {}
+void BLESensor::loop() {
+  // Parent BLEClientNode has a loop() method, but this component uses
+  // polling via update() and BLE callbacks so loop isn't needed
+  this->disable_loop();
+}
 
 void BLESensor::dump_config() {
   LOG_SENSOR("", "BLE Sensor", this);

esphome/components/ble_client/text_sensor/ble_text_sensor.cpp

@@ -14,7 +14,11 @@ static const char *const TAG = "ble_text_sensor";
 
 static const std::string EMPTY = "";
 
-void BLETextSensor::loop() {}
+void BLETextSensor::loop() {
+  // Parent BLEClientNode has a loop() method, but this component uses
+  // polling via update() and BLE callbacks so loop isn't needed
+  this->disable_loop();
+}
 
 void BLETextSensor::dump_config() {
   LOG_TEXT_SENSOR("", "BLE Text Sensor", this);

esphome/components/bme680/sensor.py

@@ -12,8 +12,8 @@ from esphome.const import (
     CONF_OVERSAMPLING,
     CONF_PRESSURE,
     CONF_TEMPERATURE,
-    DEVICE_CLASS_HUMIDITY,
     DEVICE_CLASS_ATMOSPHERIC_PRESSURE,
+    DEVICE_CLASS_HUMIDITY,
     DEVICE_CLASS_TEMPERATURE,
     ICON_GAS_CYLINDER,
     STATE_CLASS_MEASUREMENT,

esphome/components/captive_portal/captive_portal.cpp

@@ -37,7 +37,12 @@ void CaptivePortal::handle_wifisave(AsyncWebServerRequest *request) {
   request->redirect("/?save");
 }
 
-void CaptivePortal::setup() {}
+void CaptivePortal::setup() {
+#ifndef USE_ARDUINO
+  // No DNS server needed for non-Arduino frameworks
+  this->disable_loop();
+#endif
+}
 void CaptivePortal::start() {
   this->base_->init();
   if (!this->initialized_) {
@@ -50,6 +55,8 @@ void CaptivePortal::start() {
   this->dns_server_->setErrorReplyCode(DNSReplyCode::NoError);
   network::IPAddress ip = wifi::global_wifi_component->wifi_soft_ap_ip();
   this->dns_server_->start(53, "*", ip);
+  // Re-enable loop() when DNS server is started
+  this->enable_loop();
 #endif
 
   this->base_->get_server()->onNotFound([this](AsyncWebServerRequest *req) {
@@ -68,7 +75,11 @@ void CaptivePortal::start() {
 
 void CaptivePortal::handleRequest(AsyncWebServerRequest *req) {
   if (req->url() == "/") {
+#ifndef USE_ESP8266
+    auto *response = req->beginResponse(200, "text/html", INDEX_GZ, sizeof(INDEX_GZ));
+#else
     auto *response = req->beginResponse_P(200, "text/html", INDEX_GZ, sizeof(INDEX_GZ));
+#endif
     response->addHeader("Content-Encoding", "gzip");
     req->send(response);
     return;

esphome/components/captive_portal/captive_portal.h

@@ -21,8 +21,11 @@ class CaptivePortal : public AsyncWebHandler, public Component {
   void dump_config() override;
 #ifdef USE_ARDUINO
   void loop() override {
-    if (this->dns_server_ != nullptr)
+    if (this->dns_server_ != nullptr) {
       this->dns_server_->processNextRequest();
+    } else {
+      this->disable_loop();
+    }
   }
 #endif
   float get_setup_priority() const override;
@@ -37,7 +40,7 @@ class CaptivePortal : public AsyncWebHandler, public Component {
 #endif
   }
 
-  bool canHandle(AsyncWebServerRequest *request) override {
+  bool canHandle(AsyncWebServerRequest *request) const override {
     if (!this->active_)
       return false;
 

esphome/components/esp32_ble/ble.cpp

@@ -1,6 +1,7 @@
 #ifdef USE_ESP32
 
 #include "ble.h"
+#include "ble_event_pool.h"
 
 #include "esphome/core/application.h"
 #include "esphome/core/log.h"
@@ -23,9 +24,6 @@ namespace esp32_ble {
 
 static const char *const TAG = "esp32_ble";
 
-static RAMAllocator<BLEEvent> EVENT_ALLOCATOR(  // NOLINT(cppcoreguidelines-avoid-non-const-global-variables)
-    RAMAllocator<BLEEvent>::ALLOW_FAILURE | RAMAllocator<BLEEvent>::ALLOC_INTERNAL);
-
 void ESP32BLE::setup() {
   global_ble = this;
   ESP_LOGCONFIG(TAG, "Running setup");
@@ -349,9 +347,8 @@ void ESP32BLE::loop() {
       default:
         break;
     }
-    // Destructor will clean up external allocations for GATTC/GATTS
+    // Return the event to the pool
-    ble_event->~BLEEvent();
+    this->ble_event_pool_.release(ble_event);
-    EVENT_ALLOCATOR.deallocate(ble_event, 1);
     ble_event = this->ble_events_.pop();
   }
   if (this->advertising_ != nullptr) {
@@ -359,37 +356,41 @@ void ESP32BLE::loop() {
   }
 
   // Log dropped events periodically
-  size_t dropped = this->ble_events_.get_and_reset_dropped_count();
+  uint16_t dropped = this->ble_events_.get_and_reset_dropped_count();
   if (dropped > 0) {
-    ESP_LOGW(TAG, "Dropped %zu BLE events due to buffer overflow", dropped);
+    ESP_LOGW(TAG, "Dropped %u BLE events due to buffer overflow", dropped);
   }
 }
 
+// Helper function to load new event data based on type
+void load_ble_event(BLEEvent *event, esp_gap_ble_cb_event_t e, esp_ble_gap_cb_param_t *p) {
+  event->load_gap_event(e, p);
+}
+
+void load_ble_event(BLEEvent *event, esp_gattc_cb_event_t e, esp_gatt_if_t i, esp_ble_gattc_cb_param_t *p) {
+  event->load_gattc_event(e, i, p);
+}
+
+void load_ble_event(BLEEvent *event, esp_gatts_cb_event_t e, esp_gatt_if_t i, esp_ble_gatts_cb_param_t *p) {
+  event->load_gatts_event(e, i, p);
+}
+
 template<typename... Args> void enqueue_ble_event(Args... args) {
-  // Check if queue is full before allocating
+  // Allocate an event from the pool
-  if (global_ble->ble_events_.full()) {
+  BLEEvent *event = global_ble->ble_event_pool_.allocate();
-    // Queue is full, drop the event
+  if (event == nullptr) {
+    // No events available - queue is full or we're out of memory
     global_ble->ble_events_.increment_dropped_count();
     return;
   }
 
-  BLEEvent *new_event = EVENT_ALLOCATOR.allocate(1);
+  // Load new event data (replaces previous event)
-  if (new_event == nullptr) {
+  load_ble_event(event, args...);
-    // Memory too fragmented to allocate new event. Can only drop it until memory comes back
-    global_ble->ble_events_.increment_dropped_count();
-    return;
-  }
-  new (new_event) BLEEvent(args...);
 
-  // Push the event - since we're the only producer and we checked full() above,
+  // Push the event to the queue
-  // this should always succeed unless we have a bug
+  global_ble->ble_events_.push(event);
-  if (!global_ble->ble_events_.push(new_event)) {
+  // Push always succeeds because we're the only producer and the pool ensures we never exceed queue size
-    // This should not happen in SPSC queue with single producer
+}
-    ESP_LOGE(TAG, "BLE queue push failed unexpectedly");
-    new_event->~BLEEvent();
-    EVENT_ALLOCATOR.deallocate(new_event, 1);
-  }
-}  // NOLINT(clang-analyzer-unix.Malloc)
 
 // Explicit template instantiations for the friend function
 template void enqueue_ble_event(esp_gap_ble_cb_event_t, esp_ble_gap_cb_param_t *);

esphome/components/esp32_ble/ble.h

@@ -12,6 +12,7 @@
 #include "esphome/core/helpers.h"
 
 #include "ble_event.h"
+#include "ble_event_pool.h"
 #include "queue.h"
 
 #ifdef USE_ESP32
@@ -148,6 +149,7 @@ class ESP32BLE : public Component {
   BLEComponentState state_{BLE_COMPONENT_STATE_OFF};
 
   LockFreeQueue<BLEEvent, MAX_BLE_QUEUE_SIZE> ble_events_;
+  BLEEventPool<MAX_BLE_QUEUE_SIZE> ble_event_pool_;
   BLEAdvertising *advertising_{};
   esp_ble_io_cap_t io_cap_{ESP_IO_CAP_NONE};
   uint32_t advertising_cycle_time_{};

esphome/components/esp32_ble/ble_event.h

@@ -51,6 +51,13 @@ static_assert(offsetof(esp_ble_gap_cb_param_t, scan_stop_cmpl.status) ==
 // - GATTC/GATTS events: We heap-allocate and copy the entire param struct, ensuring
 //   the data remains valid even after the BLE callback returns. The original
 //   param pointer from ESP-IDF is only valid during the callback.
+//
+// CRITICAL DESIGN NOTE:
+// The heap allocations for GATTC/GATTS events are REQUIRED for memory safety.
+// DO NOT attempt to optimize by removing these allocations or storing pointers
+// to the original ESP-IDF data. The ESP-IDF callback data has a different lifetime
+// than our event processing, and accessing it after the callback returns would
+// result in use-after-free bugs and crashes.
 class BLEEvent {
  public:
   // NOLINTNEXTLINE(readability-identifier-naming)
@@ -63,123 +70,72 @@ class BLEEvent {
   // Constructor for GAP events - no external allocations needed
   BLEEvent(esp_gap_ble_cb_event_t e, esp_ble_gap_cb_param_t *p) {
     this->type_ = GAP;
-    this->event_.gap.gap_event = e;
+    this->init_gap_data_(e, p);
-
-    if (p == nullptr) {
-      return;  // Invalid event, but we can't log in header file
-    }
-
-    // Only copy the data we actually use for each GAP event type
-    switch (e) {
-      case ESP_GAP_BLE_SCAN_RESULT_EVT:
-        // Copy only the fields we use from scan results
-        memcpy(this->event_.gap.scan_result.bda, p->scan_rst.bda, sizeof(esp_bd_addr_t));
-        this->event_.gap.scan_result.ble_addr_type = p->scan_rst.ble_addr_type;
-        this->event_.gap.scan_result.rssi = p->scan_rst.rssi;
-        this->event_.gap.scan_result.adv_data_len = p->scan_rst.adv_data_len;
-        this->event_.gap.scan_result.scan_rsp_len = p->scan_rst.scan_rsp_len;
-        this->event_.gap.scan_result.search_evt = p->scan_rst.search_evt;
-        memcpy(this->event_.gap.scan_result.ble_adv, p->scan_rst.ble_adv,
-               ESP_BLE_ADV_DATA_LEN_MAX + ESP_BLE_SCAN_RSP_DATA_LEN_MAX);
-        break;
-
-      case ESP_GAP_BLE_SCAN_PARAM_SET_COMPLETE_EVT:
-        this->event_.gap.scan_complete.status = p->scan_param_cmpl.status;
-        break;
-
-      case ESP_GAP_BLE_SCAN_START_COMPLETE_EVT:
-        this->event_.gap.scan_complete.status = p->scan_start_cmpl.status;
-        break;
-
-      case ESP_GAP_BLE_SCAN_STOP_COMPLETE_EVT:
-        this->event_.gap.scan_complete.status = p->scan_stop_cmpl.status;
-        break;
-
-      default:
-        // We only handle 4 GAP event types, others are dropped
-        break;
-    }
   }
 
   // Constructor for GATTC events - uses heap allocation
-  // Creates a copy of the param struct since the original is only valid during the callback
+  // IMPORTANT: The heap allocation is REQUIRED and must not be removed as an optimization.
+  // The param pointer from ESP-IDF is only valid during the callback execution.
+  // Since BLE events are processed asynchronously in the main loop, we must create
+  // our own copy to ensure the data remains valid until the event is processed.
   BLEEvent(esp_gattc_cb_event_t e, esp_gatt_if_t i, esp_ble_gattc_cb_param_t *p) {
     this->type_ = GATTC;
-    this->event_.gattc.gattc_event = e;
+    this->init_gattc_data_(e, i, p);
-    this->event_.gattc.gattc_if = i;
-
-    if (p == nullptr) {
-      this->event_.gattc.gattc_param = nullptr;
-      this->event_.gattc.data = nullptr;
-      return;  // Invalid event, but we can't log in header file
-    }
-
-    // Heap-allocate param and data
-    // Heap allocation is used because GATTC/GATTS events are rare (<1% of events)
-    // while GAP events (99%) are stored inline to minimize memory usage
-    this->event_.gattc.gattc_param = new esp_ble_gattc_cb_param_t(*p);
-
-    // Copy data for events that need it
-    switch (e) {
-      case ESP_GATTC_NOTIFY_EVT:
-        this->event_.gattc.data = new std::vector<uint8_t>(p->notify.value, p->notify.value + p->notify.value_len);
-        this->event_.gattc.gattc_param->notify.value = this->event_.gattc.data->data();
-        break;
-      case ESP_GATTC_READ_CHAR_EVT:
-      case ESP_GATTC_READ_DESCR_EVT:
-        this->event_.gattc.data = new std::vector<uint8_t>(p->read.value, p->read.value + p->read.value_len);
-        this->event_.gattc.gattc_param->read.value = this->event_.gattc.data->data();
-        break;
-      default:
-        this->event_.gattc.data = nullptr;
-        break;
-    }
   }
 
   // Constructor for GATTS events - uses heap allocation
-  // Creates a copy of the param struct since the original is only valid during the callback
+  // IMPORTANT: The heap allocation is REQUIRED and must not be removed as an optimization.
+  // The param pointer from ESP-IDF is only valid during the callback execution.
+  // Since BLE events are processed asynchronously in the main loop, we must create
+  // our own copy to ensure the data remains valid until the event is processed.
   BLEEvent(esp_gatts_cb_event_t e, esp_gatt_if_t i, esp_ble_gatts_cb_param_t *p) {
     this->type_ = GATTS;
-    this->event_.gatts.gatts_event = e;
+    this->init_gatts_data_(e, i, p);
-    this->event_.gatts.gatts_if = i;
-
-    if (p == nullptr) {
-      this->event_.gatts.gatts_param = nullptr;
-      this->event_.gatts.data = nullptr;
-      return;  // Invalid event, but we can't log in header file
-    }
-
-    // Heap-allocate param and data
-    // Heap allocation is used because GATTC/GATTS events are rare (<1% of events)
-    // while GAP events (99%) are stored inline to minimize memory usage
-    this->event_.gatts.gatts_param = new esp_ble_gatts_cb_param_t(*p);
-
-    // Copy data for events that need it
-    switch (e) {
-      case ESP_GATTS_WRITE_EVT:
-        this->event_.gatts.data = new std::vector<uint8_t>(p->write.value, p->write.value + p->write.len);
-        this->event_.gatts.gatts_param->write.value = this->event_.gatts.data->data();
-        break;
-      default:
-        this->event_.gatts.data = nullptr;
-        break;
-    }
   }
 
   // Destructor to clean up heap allocations
-  ~BLEEvent() {
+  ~BLEEvent() { this->cleanup_heap_data(); }
-    switch (this->type_) {
+
-      case GATTC:
+  // Default constructor for pre-allocation in pool
-        delete this->event_.gattc.gattc_param;
+  BLEEvent() : type_(GAP) {}
-        delete this->event_.gattc.data;
+
-        break;
+  // Clean up any heap-allocated data
-      case GATTS:
+  void cleanup_heap_data() {
-        delete this->event_.gatts.gatts_param;
+    if (this->type_ == GAP) {
-        delete this->event_.gatts.data;
+      return;
-        break;
-      default:
-        break;
     }
+    if (this->type_ == GATTC) {
+      delete this->event_.gattc.gattc_param;
+      delete this->event_.gattc.data;
+      this->event_.gattc.gattc_param = nullptr;
+      this->event_.gattc.data = nullptr;
+      return;
+    }
+    if (this->type_ == GATTS) {
+      delete this->event_.gatts.gatts_param;
+      delete this->event_.gatts.data;
+      this->event_.gatts.gatts_param = nullptr;
+      this->event_.gatts.data = nullptr;
+    }
+  }
+
+  // Load new event data for reuse (replaces previous event data)
+  void load_gap_event(esp_gap_ble_cb_event_t e, esp_ble_gap_cb_param_t *p) {
+    this->cleanup_heap_data();
+    this->type_ = GAP;
+    this->init_gap_data_(e, p);
+  }
+
+  void load_gattc_event(esp_gattc_cb_event_t e, esp_gatt_if_t i, esp_ble_gattc_cb_param_t *p) {
+    this->cleanup_heap_data();
+    this->type_ = GATTC;
+    this->init_gattc_data_(e, i, p);
+  }
+
+  void load_gatts_event(esp_gatts_cb_event_t e, esp_gatt_if_t i, esp_ble_gatts_cb_param_t *p) {
+    this->cleanup_heap_data();
+    this->type_ = GATTS;
+    this->init_gatts_data_(e, i, p);
   }
 
   // Disable copy to prevent double-delete
@@ -224,6 +180,119 @@ class BLEEvent {
   esp_gap_ble_cb_event_t gap_event_type() const { return event_.gap.gap_event; }
   const BLEScanResult &scan_result() const { return event_.gap.scan_result; }
   esp_bt_status_t scan_complete_status() const { return event_.gap.scan_complete.status; }
+
+ private:
+  // Initialize GAP event data
+  void init_gap_data_(esp_gap_ble_cb_event_t e, esp_ble_gap_cb_param_t *p) {
+    this->event_.gap.gap_event = e;
+
+    if (p == nullptr) {
+      return;  // Invalid event, but we can't log in header file
+    }
+
+    // Copy data based on event type
+    switch (e) {
+      case ESP_GAP_BLE_SCAN_RESULT_EVT:
+        memcpy(this->event_.gap.scan_result.bda, p->scan_rst.bda, sizeof(esp_bd_addr_t));
+        this->event_.gap.scan_result.ble_addr_type = p->scan_rst.ble_addr_type;
+        this->event_.gap.scan_result.rssi = p->scan_rst.rssi;
+        this->event_.gap.scan_result.adv_data_len = p->scan_rst.adv_data_len;
+        this->event_.gap.scan_result.scan_rsp_len = p->scan_rst.scan_rsp_len;
+        this->event_.gap.scan_result.search_evt = p->scan_rst.search_evt;
+        memcpy(this->event_.gap.scan_result.ble_adv, p->scan_rst.ble_adv,
+               ESP_BLE_ADV_DATA_LEN_MAX + ESP_BLE_SCAN_RSP_DATA_LEN_MAX);
+        break;
+
+      case ESP_GAP_BLE_SCAN_PARAM_SET_COMPLETE_EVT:
+        this->event_.gap.scan_complete.status = p->scan_param_cmpl.status;
+        break;
+
+      case ESP_GAP_BLE_SCAN_START_COMPLETE_EVT:
+        this->event_.gap.scan_complete.status = p->scan_start_cmpl.status;
+        break;
+
+      case ESP_GAP_BLE_SCAN_STOP_COMPLETE_EVT:
+        this->event_.gap.scan_complete.status = p->scan_stop_cmpl.status;
+        break;
+
+      default:
+        // We only handle 4 GAP event types, others are dropped
+        break;
+    }
+  }
+
+  // Initialize GATTC event data
+  void init_gattc_data_(esp_gattc_cb_event_t e, esp_gatt_if_t i, esp_ble_gattc_cb_param_t *p) {
+    this->event_.gattc.gattc_event = e;
+    this->event_.gattc.gattc_if = i;
+
+    if (p == nullptr) {
+      this->event_.gattc.gattc_param = nullptr;
+      this->event_.gattc.data = nullptr;
+      return;  // Invalid event, but we can't log in header file
+    }
+
+    // Heap-allocate param and data
+    // Heap allocation is used because GATTC/GATTS events are rare (<1% of events)
+    // while GAP events (99%) are stored inline to minimize memory usage
+    // IMPORTANT: This heap allocation provides clear ownership semantics:
+    // - The BLEEvent owns the allocated memory for its lifetime
+    // - The data remains valid from the BLE callback context until processed in the main loop
+    // - Without this copy, we'd have use-after-free bugs as ESP-IDF reuses the callback memory
+    this->event_.gattc.gattc_param = new esp_ble_gattc_cb_param_t(*p);
+
+    // Copy data for events that need it
+    // The param struct contains pointers (e.g., notify.value) that point to temporary buffers.
+    // We must copy this data to ensure it remains valid when the event is processed later.
+    switch (e) {
+      case ESP_GATTC_NOTIFY_EVT:
+        this->event_.gattc.data = new std::vector<uint8_t>(p->notify.value, p->notify.value + p->notify.value_len);
+        this->event_.gattc.gattc_param->notify.value = this->event_.gattc.data->data();
+        break;
+      case ESP_GATTC_READ_CHAR_EVT:
+      case ESP_GATTC_READ_DESCR_EVT:
+        this->event_.gattc.data = new std::vector<uint8_t>(p->read.value, p->read.value + p->read.value_len);
+        this->event_.gattc.gattc_param->read.value = this->event_.gattc.data->data();
+        break;
+      default:
+        this->event_.gattc.data = nullptr;
+        break;
+    }
+  }
+
+  // Initialize GATTS event data
+  void init_gatts_data_(esp_gatts_cb_event_t e, esp_gatt_if_t i, esp_ble_gatts_cb_param_t *p) {
+    this->event_.gatts.gatts_event = e;
+    this->event_.gatts.gatts_if = i;
+
+    if (p == nullptr) {
+      this->event_.gatts.gatts_param = nullptr;
+      this->event_.gatts.data = nullptr;
+      return;  // Invalid event, but we can't log in header file
+    }
+
+    // Heap-allocate param and data
+    // Heap allocation is used because GATTC/GATTS events are rare (<1% of events)
+    // while GAP events (99%) are stored inline to minimize memory usage
+    // IMPORTANT: This heap allocation provides clear ownership semantics:
+    // - The BLEEvent owns the allocated memory for its lifetime
+    // - The data remains valid from the BLE callback context until processed in the main loop
+    // - Without this copy, we'd have use-after-free bugs as ESP-IDF reuses the callback memory
+    this->event_.gatts.gatts_param = new esp_ble_gatts_cb_param_t(*p);
+
+    // Copy data for events that need it
+    // The param struct contains pointers (e.g., write.value) that point to temporary buffers.
+    // We must copy this data to ensure it remains valid when the event is processed later.
+    switch (e) {
+      case ESP_GATTS_WRITE_EVT:
+        this->event_.gatts.data = new std::vector<uint8_t>(p->write.value, p->write.value + p->write.len);
+        this->event_.gatts.gatts_param->write.value = this->event_.gatts.data->data();
+        break;
+      default:
+        this->event_.gatts.data = nullptr;
+        break;
+    }
+  }
 };
 
 // BLEEvent total size: 84 bytes (80 byte union + 1 byte type + 3 bytes padding)

esphome/components/esp32_ble/ble_event_pool.h

@@ -0,0 +1,72 @@
+#pragma once
+
+#ifdef USE_ESP32
+
+#include <atomic>
+#include <cstddef>
+#include "ble_event.h"
+#include "queue.h"
+#include "esphome/core/helpers.h"
+
+namespace esphome {
+namespace esp32_ble {
+
+// BLE Event Pool - On-demand pool of BLEEvent objects to avoid heap fragmentation
+// Events are allocated on first use and reused thereafter, growing to peak usage
+template<uint8_t SIZE> class BLEEventPool {
+ public:
+  BLEEventPool() : total_created_(0) {}
+
+  ~BLEEventPool() {
+    // Clean up any remaining events in the free list
+    BLEEvent *event;
+    while ((event = this->free_list_.pop()) != nullptr) {
+      delete event;
+    }
+  }
+
+  // Allocate an event from the pool
+  // Returns nullptr if pool is full
+  BLEEvent *allocate() {
+    // Try to get from free list first
+    BLEEvent *event = this->free_list_.pop();
+    if (event != nullptr)
+      return event;
+
+    // Need to create a new event
+    if (this->total_created_ >= SIZE) {
+      // Pool is at capacity
+      return nullptr;
+    }
+
+    // Use internal RAM for better performance
+    RAMAllocator<BLEEvent> allocator(RAMAllocator<BLEEvent>::ALLOC_INTERNAL);
+    event = allocator.allocate(1);
+
+    if (event == nullptr) {
+      // Memory allocation failed
+      return nullptr;
+    }
+
+    // Placement new to construct the object
+    new (event) BLEEvent();
+    this->total_created_++;
+    return event;
+  }
+
+  // Return an event to the pool for reuse
+  void release(BLEEvent *event) {
+    if (event != nullptr) {
+      this->free_list_.push(event);
+    }
+  }
+
+ private:
+  LockFreeQueue<BLEEvent, SIZE> free_list_;  // Free events ready for reuse
+  uint8_t total_created_;                    // Total events created (high water mark)
+};
+
+}  // namespace esp32_ble
+}  // namespace esphome
+
+#endif

esphome/components/esp32_ble/queue.h

@@ -18,7 +18,7 @@
 namespace esphome {
 namespace esp32_ble {
 
-template<class T, size_t SIZE> class LockFreeQueue {
+template<class T, uint8_t SIZE> class LockFreeQueue {
  public:
   LockFreeQueue() : head_(0), tail_(0), dropped_count_(0) {}
 
@@ -26,8 +26,8 @@ template<class T, size_t SIZE> class LockFreeQueue {
     if (element == nullptr)
       return false;
 
-    size_t current_tail = tail_.load(std::memory_order_relaxed);
+    uint8_t current_tail = tail_.load(std::memory_order_relaxed);
-    size_t next_tail = (current_tail + 1) % SIZE;
+    uint8_t next_tail = (current_tail + 1) % SIZE;
 
     if (next_tail == head_.load(std::memory_order_acquire)) {
       // Buffer full
@@ -41,7 +41,7 @@ template<class T, size_t SIZE> class LockFreeQueue {
   }
 
   T *pop() {
-    size_t current_head = head_.load(std::memory_order_relaxed);
+    uint8_t current_head = head_.load(std::memory_order_relaxed);
 
     if (current_head == tail_.load(std::memory_order_acquire)) {
       return nullptr;  // Empty
@@ -53,27 +53,30 @@ template<class T, size_t SIZE> class LockFreeQueue {
   }
 
   size_t size() const {
-    size_t tail = tail_.load(std::memory_order_acquire);
+    uint8_t tail = tail_.load(std::memory_order_acquire);
-    size_t head = head_.load(std::memory_order_acquire);
+    uint8_t head = head_.load(std::memory_order_acquire);
     return (tail - head + SIZE) % SIZE;
   }
 
-  size_t get_and_reset_dropped_count() { return dropped_count_.exchange(0, std::memory_order_relaxed); }
+  uint16_t get_and_reset_dropped_count() { return dropped_count_.exchange(0, std::memory_order_relaxed); }
 
   void increment_dropped_count() { dropped_count_.fetch_add(1, std::memory_order_relaxed); }
 
   bool empty() const { return head_.load(std::memory_order_acquire) == tail_.load(std::memory_order_acquire); }
 
   bool full() const {
-    size_t next_tail = (tail_.load(std::memory_order_relaxed) + 1) % SIZE;
+    uint8_t next_tail = (tail_.load(std::memory_order_relaxed) + 1) % SIZE;
     return next_tail == head_.load(std::memory_order_acquire);
   }
 
  protected:
   T *buffer_[SIZE];
-  std::atomic<size_t> head_;
+  // Atomic: written by producer (push/increment), read+reset by consumer (get_and_reset)
-  std::atomic<size_t> tail_;
+  std::atomic<uint16_t> dropped_count_;  // 65535 max - more than enough for drop tracking
-  std::atomic<size_t> dropped_count_;
+  // Atomic: written by consumer (pop), read by producer (push) to check if full
+  std::atomic<uint8_t> head_;
+  // Atomic: written by producer (push), read by consumer (pop) to check if empty
+  std::atomic<uint8_t> tail_;
 };
 
 }  // namespace esp32_ble

esphome/components/esp32_ble_client/ble_client_base.cpp

@@ -22,6 +22,16 @@ void BLEClientBase::setup() {
   this->connection_index_ = connection_index++;
 }
 
+void BLEClientBase::set_state(espbt::ClientState st) {
+  ESP_LOGV(TAG, "[%d] [%s] Set state %d", this->connection_index_, this->address_str_.c_str(), (int) st);
+  ESPBTClient::set_state(st);
+
+  if (st == espbt::ClientState::READY_TO_CONNECT) {
+    // Enable loop when we need to connect
+    this->enable_loop();
+  }
+}
+
 void BLEClientBase::loop() {
   if (!esp32_ble::global_ble->is_active()) {
     this->set_state(espbt::ClientState::INIT);
@@ -37,9 +47,14 @@ void BLEClientBase::loop() {
   }
   // READY_TO_CONNECT means we have discovered the device
   // and the scanner has been stopped by the tracker.
-  if (this->state_ == espbt::ClientState::READY_TO_CONNECT) {
+  else if (this->state_ == espbt::ClientState::READY_TO_CONNECT) {
     this->connect();
   }
+  // If its idle, we can disable the loop as set_state
+  // will enable it again when we need to connect.
+  else if (this->state_ == espbt::ClientState::IDLE) {
+    this->disable_loop();
+  }
 }
 
 float BLEClientBase::get_setup_priority() const { return setup_priority::AFTER_BLUETOOTH; }

esphome/components/esp32_ble_client/ble_client_base.h

@@ -93,6 +93,8 @@ class BLEClientBase : public espbt::ESPBTClient, public Component {
 
   bool check_addr(esp_bd_addr_t &addr) { return memcmp(addr, this->remote_bda_, sizeof(esp_bd_addr_t)) == 0; }
 
+  void set_state(espbt::ClientState st) override;
+
  protected:
   // Memory optimized layout for 32-bit systems
   // Group 1: 8-byte types

esphome/components/esp32_hall/esp32_hall.cpp

@@ -1,25 +0,0 @@
-#ifdef USE_ESP32
-#include "esp32_hall.h"
-#include "esphome/core/log.h"
-#include "esphome/core/hal.h"
-#include <driver/adc.h>
-
-namespace esphome {
-namespace esp32_hall {
-
-static const char *const TAG = "esp32_hall";
-
-void ESP32HallSensor::update() {
-  adc1_config_width(ADC_WIDTH_BIT_12);
-  int value_int = hall_sensor_read();
-  float value = (value_int / 4095.0f) * 10000.0f;
-  ESP_LOGD(TAG, "'%s': Got reading %.0f µT", this->name_.c_str(), value);
-  this->publish_state(value);
-}
-std::string ESP32HallSensor::unique_id() { return get_mac_address() + "-hall"; }
-void ESP32HallSensor::dump_config() { LOG_SENSOR("", "ESP32 Hall Sensor", this); }
-
-}  // namespace esp32_hall
-}  // namespace esphome
-
-#endif

esphome/components/esp32_hall/esp32_hall.h

@@ -1,23 +0,0 @@
-#pragma once
-
-#include "esphome/core/component.h"
-#include "esphome/components/sensor/sensor.h"
-
-#ifdef USE_ESP32
-
-namespace esphome {
-namespace esp32_hall {
-
-class ESP32HallSensor : public sensor::Sensor, public PollingComponent {
- public:
-  void dump_config() override;
-
-  void update() override;
-
-  std::string unique_id() override;
-};
-
-}  // namespace esp32_hall
-}  // namespace esphome
-
-#endif

esphome/components/esp32_hall/sensor.py

@@ -1,24 +0,0 @@
-import esphome.codegen as cg
-from esphome.components import sensor
-import esphome.config_validation as cv
-from esphome.const import ICON_MAGNET, STATE_CLASS_MEASUREMENT, UNIT_MICROTESLA
-
-DEPENDENCIES = ["esp32"]
-
-esp32_hall_ns = cg.esphome_ns.namespace("esp32_hall")
-ESP32HallSensor = esp32_hall_ns.class_(
-    "ESP32HallSensor", sensor.Sensor, cg.PollingComponent
-)
-
-CONFIG_SCHEMA = sensor.sensor_schema(
-    ESP32HallSensor,
-    unit_of_measurement=UNIT_MICROTESLA,
-    icon=ICON_MAGNET,
-    accuracy_decimals=1,
-    state_class=STATE_CLASS_MEASUREMENT,
-).extend(cv.polling_component_schema("60s"))
-
-
-async def to_code(config):
-    var = await sensor.new_sensor(config)
-    await cg.register_component(var, config)

esphome/components/esp32_improv/esp32_improv_component.cpp

@@ -168,6 +168,8 @@ void ESP32ImprovComponent::loop() {
     case improv::STATE_PROVISIONED: {
       this->incoming_data_.clear();
       this->set_status_indicator_state_(false);
+      // Provisioning complete, no further loop execution needed
+      this->disable_loop();
       break;
     }
   }
@@ -254,6 +256,7 @@ void ESP32ImprovComponent::start() {
 
   ESP_LOGD(TAG, "Setting Improv to start");
   this->should_start_ = true;
+  this->enable_loop();
 }
 
 void ESP32ImprovComponent::stop() {

esphome/components/heatpumpir/climate.py

@@ -125,6 +125,6 @@ async def to_code(config):
     cg.add(var.set_max_temperature(config[CONF_MAX_TEMPERATURE]))
     cg.add(var.set_min_temperature(config[CONF_MIN_TEMPERATURE]))
 
-    cg.add_library("tonia/HeatpumpIR", "1.0.32")
+    cg.add_library("tonia/HeatpumpIR", "1.0.35")
     if CORE.is_libretiny:
         CORE.add_platformio_option("lib_ignore", "IRremoteESP8266")

esphome/components/i2s_audio/media_player/__init__.py

@@ -116,5 +116,5 @@ async def to_code(config):
 
     cg.add_library("WiFiClientSecure", None)
     cg.add_library("HTTPClient", None)
-    cg.add_library("esphome/ESP32-audioI2S", "2.2.0")
+    cg.add_library("esphome/ESP32-audioI2S", "2.3.0")
     cg.add_build_flag("-DAUDIO_NO_SD_FS")

esphome/components/light/light_state.h

@@ -17,7 +17,7 @@ namespace light {
 
 class LightOutput;
 
-enum LightRestoreMode {
+enum LightRestoreMode : uint8_t {
   LIGHT_RESTORE_DEFAULT_OFF,
   LIGHT_RESTORE_DEFAULT_ON,
   LIGHT_ALWAYS_OFF,
@@ -212,12 +212,18 @@ class LightState : public EntityBase, public Component {
 
   /// Store the output to allow effects to have more access.
   LightOutput *output_;
-  /// Value for storing the index of the currently active effect. 0 if no effect is active
-  uint32_t active_effect_index_{};
   /// The currently active transformer for this light (transition/flash).
   std::unique_ptr<LightTransformer> transformer_{nullptr};
-  /// Whether the light value should be written in the next cycle.
+  /// List of effects for this light.
-  bool next_write_{true};
+  std::vector<LightEffect *> effects_;
+  /// Value for storing the index of the currently active effect. 0 if no effect is active
+  uint32_t active_effect_index_{};
+  /// Default transition length for all transitions in ms.
+  uint32_t default_transition_length_{};
+  /// Transition length to use for flash transitions.
+  uint32_t flash_transition_length_{};
+  /// Gamma correction factor for the light.
+  float gamma_correct_{};
 
   /// Object used to store the persisted values of the light.
   ESPPreferenceObject rtc_;
@@ -236,19 +242,13 @@ class LightState : public EntityBase, public Component {
    */
   CallbackManager<void()> target_state_reached_callback_{};
 
-  /// Default transition length for all transitions in ms.
-  uint32_t default_transition_length_{};
-  /// Transition length to use for flash transitions.
-  uint32_t flash_transition_length_{};
-  /// Gamma correction factor for the light.
-  float gamma_correct_{};
-  /// Restore mode of the light.
-  LightRestoreMode restore_mode_;
   /// Initial state of the light.
   optional<LightStateRTCState> initial_state_{};
-  /// List of effects for this light.
-  std::vector<LightEffect *> effects_;
 
+  /// Restore mode of the light.
+  LightRestoreMode restore_mode_;
+  /// Whether the light value should be written in the next cycle.
+  bool next_write_{true};
   // for effects, true if a transformer (transition) is active.
   bool is_transformer_active_ = false;
 };

esphome/components/online_image/online_image.cpp

@@ -178,18 +178,21 @@ void OnlineImage::update() {
   if (this->format_ == ImageFormat::BMP) {
     ESP_LOGD(TAG, "Allocating BMP decoder");
     this->decoder_ = make_unique<BmpDecoder>(this);
+    this->enable_loop();
   }
 #endif  // USE_ONLINE_IMAGE_BMP_SUPPORT
 #ifdef USE_ONLINE_IMAGE_JPEG_SUPPORT
   if (this->format_ == ImageFormat::JPEG) {
     ESP_LOGD(TAG, "Allocating JPEG decoder");
     this->decoder_ = esphome::make_unique<JpegDecoder>(this);
+    this->enable_loop();
   }
 #endif  // USE_ONLINE_IMAGE_JPEG_SUPPORT
 #ifdef USE_ONLINE_IMAGE_PNG_SUPPORT
   if (this->format_ == ImageFormat::PNG) {
     ESP_LOGD(TAG, "Allocating PNG decoder");
     this->decoder_ = make_unique<PngDecoder>(this);
+    this->enable_loop();
   }
 #endif  // USE_ONLINE_IMAGE_PNG_SUPPORT
 
@@ -212,6 +215,7 @@ void OnlineImage::update() {
 void OnlineImage::loop() {
   if (!this->decoder_) {
     // Not decoding at the moment => nothing to do.
+    this->disable_loop();
     return;
   }
   if (!this->downloader_ || this->decoder_->is_finished()) {

esphome/components/preferences/syncer.h

@@ -12,6 +12,8 @@ class IntervalSyncer : public Component {
   void setup() override {
     if (this->write_interval_ != 0) {
       set_interval(this->write_interval_, []() { global_preferences->sync(); });
+      // When using interval-based syncing, we don't need the loop
+      this->disable_loop();
     }
   }
   void loop() override {

esphome/components/prometheus/prometheus_handler.h

@@ -40,7 +40,7 @@ class PrometheusHandler : public AsyncWebHandler, public Component {
    */
   void add_label_name(EntityBase *obj, const std::string &value) { relabel_map_name_.insert({obj, value}); }
 
-  bool canHandle(AsyncWebServerRequest *request) override {
+  bool canHandle(AsyncWebServerRequest *request) const override {
     if (request->method() == HTTP_GET) {
       if (request->url() == "/metrics")
         return true;

esphome/components/rtttl/rtttl.cpp

@@ -142,8 +142,10 @@ void Rtttl::stop() {
 }
 
 void Rtttl::loop() {
-  if (this->note_duration_ == 0 || this->state_ == State::STATE_STOPPED)
+  if (this->note_duration_ == 0 || this->state_ == State::STATE_STOPPED) {
+    this->disable_loop();
     return;
+  }
 
 #ifdef USE_SPEAKER
   if (this->speaker_ != nullptr) {
@@ -391,6 +393,11 @@ void Rtttl::set_state_(State state) {
   this->state_ = state;
   ESP_LOGV(TAG, "State changed from %s to %s", LOG_STR_ARG(state_to_string(old_state)),
            LOG_STR_ARG(state_to_string(state)));
+
+  // Clear loop_done when transitioning from STOPPED to any other state
+  if (old_state == State::STATE_STOPPED && state != State::STATE_STOPPED) {
+    this->enable_loop();
+  }
 }
 
 }  // namespace rtttl

esphome/components/safe_mode/safe_mode.cpp

@@ -42,6 +42,8 @@ void SafeModeComponent::loop() {
     ESP_LOGI(TAG, "Boot seems successful; resetting boot loop counter");
     this->clean_rtc();
     this->boot_successful_ = true;
+    // Disable loop since we no longer need to check
+    this->disable_loop();
   }
 }
 

esphome/components/sntp/sntp_component.cpp

@@ -67,6 +67,12 @@ void SNTPComponent::loop() {
            time.minute, time.second);
   this->time_sync_callback_.call();
   this->has_time_ = true;
+
+#ifdef USE_ESP_IDF
+  // On ESP-IDF, time sync is permanent and update() doesn't force resync
+  // Time is now synchronized, no need to check anymore
+  this->disable_loop();
+#endif
 }
 
 }  // namespace sntp

esphome/components/switch/switch.h

@@ -21,7 +21,7 @@ const int RESTORE_MODE_PERSISTENT_MASK = 0x02;
 const int RESTORE_MODE_INVERTED_MASK = 0x04;
 const int RESTORE_MODE_DISABLED_MASK = 0x08;
 
-enum SwitchRestoreMode {
+enum SwitchRestoreMode : uint8_t {
   SWITCH_ALWAYS_OFF = !RESTORE_MODE_ON_MASK,
   SWITCH_ALWAYS_ON = RESTORE_MODE_ON_MASK,
   SWITCH_RESTORE_DEFAULT_OFF = RESTORE_MODE_PERSISTENT_MASK,
@@ -49,12 +49,12 @@ class Switch : public EntityBase, public EntityBase_DeviceClass {
    */
   void publish_state(bool state);
 
-  /// The current reported state of the binary sensor.
-  bool state;
-
   /// Indicates whether or not state is to be retrieved from flash and how
   SwitchRestoreMode restore_mode{SWITCH_RESTORE_DEFAULT_OFF};
 
+  /// The current reported state of the binary sensor.
+  bool state;
+
   /** Turn this switch on. This is called by the front-end.
    *
    * For implementing switches, please override write_state.
@@ -123,10 +123,16 @@ class Switch : public EntityBase, public EntityBase_DeviceClass {
    */
   virtual void write_state(bool state) = 0;
 
-  CallbackManager<void(bool)> state_callback_{};
+  // Pointer first (4 bytes)
-  bool inverted_{false};
-  Deduplicator<bool> publish_dedup_;
   ESPPreferenceObject rtc_;
+
+  // CallbackManager (12 bytes on 32-bit - contains vector)
+  CallbackManager<void(bool)> state_callback_{};
+
+  // Small types grouped together
+  Deduplicator<bool> publish_dedup_;  // 2 bytes (bool has_value_ + bool last_value_)
+  bool inverted_{false};              // 1 byte
+  // Total: 3 bytes, 1 byte padding
 };
 
 #define LOG_SWITCH(prefix, type, obj) log_switch((TAG), (prefix), LOG_STR_LITERAL(type), (obj))

esphome/components/tlc5971/tlc5971.cpp

@@ -24,8 +24,10 @@ void TLC5971::dump_config() {
 }
 
 void TLC5971::loop() {
-  if (!this->update_)
+  if (!this->update_) {
+    this->disable_loop();
     return;
+  }
 
   uint32_t command;
 
@@ -93,6 +95,7 @@ void TLC5971::set_channel_value(uint16_t channel, uint16_t value) {
     return;
   if (this->pwm_amounts_[channel] != value) {
     this->update_ = true;
+    this->enable_loop();
   }
   this->pwm_amounts_[channel] = value;
 }

esphome/components/web_server/web_server.cpp

@@ -91,7 +91,7 @@ void DeferredUpdateEventSource::process_deferred_queue_() {
   while (!deferred_queue_.empty()) {
     DeferredEvent &de = deferred_queue_.front();
     std::string message = de.message_generator_(web_server_, de.source_);
-    if (this->try_send(message.c_str(), "state")) {
+    if (this->send(message.c_str(), "state") != DISCARDED) {
       // O(n) but memory efficiency is more important than speed here which is why std::vector was chosen
       deferred_queue_.erase(deferred_queue_.begin());
     } else {
@@ -131,7 +131,7 @@ void DeferredUpdateEventSource::deferrable_send_state(void *source, const char *
     deq_push_back_with_dedup_(source, message_generator);
   } else {
     std::string message = message_generator(web_server_, source);
-    if (!this->try_send(message.c_str(), "state")) {
+    if (this->send(message.c_str(), "state") == DISCARDED) {
       deq_push_back_with_dedup_(source, message_generator);
     }
   }
@@ -171,8 +171,8 @@ void DeferredUpdateEventSourceList::add_new_client(WebServer *ws, AsyncWebServer
     ws->defer([this, ws, es]() { this->on_client_connect_(ws, es); });
   });
 
-  es->onDisconnect([this, ws](AsyncEventSource *source, AsyncEventSourceClient *client) {
+  es->onDisconnect([this, ws, es](AsyncEventSourceClient *client) {
-    ws->defer([this, source]() { this->on_client_disconnect_((DeferredUpdateEventSource *) source); });
+    ws->defer([this, es]() { this->on_client_disconnect_((DeferredUpdateEventSource *) es); });
   });
 
   es->handleRequest(request);
@@ -291,14 +291,23 @@ float WebServer::get_setup_priority() const { return setup_priority::WIFI - 1.0f
 
 #ifdef USE_WEBSERVER_LOCAL
 void WebServer::handle_index_request(AsyncWebServerRequest *request) {
+#ifndef USE_ESP8266
+  AsyncWebServerResponse *response = request->beginResponse(200, "text/html", INDEX_GZ, sizeof(INDEX_GZ));
+#else
   AsyncWebServerResponse *response = request->beginResponse_P(200, "text/html", INDEX_GZ, sizeof(INDEX_GZ));
+#endif
   response->addHeader("Content-Encoding", "gzip");
   request->send(response);
 }
 #elif USE_WEBSERVER_VERSION >= 2
 void WebServer::handle_index_request(AsyncWebServerRequest *request) {
+#ifndef USE_ESP8266
+  AsyncWebServerResponse *response =
+      request->beginResponse(200, "text/html", ESPHOME_WEBSERVER_INDEX_HTML, ESPHOME_WEBSERVER_INDEX_HTML_SIZE);
+#else
   AsyncWebServerResponse *response =
       request->beginResponse_P(200, "text/html", ESPHOME_WEBSERVER_INDEX_HTML, ESPHOME_WEBSERVER_INDEX_HTML_SIZE);
+#endif
   // No gzip header here because the HTML file is so small
   request->send(response);
 }
@@ -317,8 +326,13 @@ void WebServer::handle_pna_cors_request(AsyncWebServerRequest *request) {
 
 #ifdef USE_WEBSERVER_CSS_INCLUDE
 void WebServer::handle_css_request(AsyncWebServerRequest *request) {
+#ifndef USE_ESP8266
+  AsyncWebServerResponse *response =
+      request->beginResponse(200, "text/css", ESPHOME_WEBSERVER_CSS_INCLUDE, ESPHOME_WEBSERVER_CSS_INCLUDE_SIZE);
+#else
   AsyncWebServerResponse *response =
       request->beginResponse_P(200, "text/css", ESPHOME_WEBSERVER_CSS_INCLUDE, ESPHOME_WEBSERVER_CSS_INCLUDE_SIZE);
+#endif
   response->addHeader("Content-Encoding", "gzip");
   request->send(response);
 }
@@ -326,8 +340,13 @@ void WebServer::handle_css_request(AsyncWebServerRequest *request) {
 
 #ifdef USE_WEBSERVER_JS_INCLUDE
 void WebServer::handle_js_request(AsyncWebServerRequest *request) {
+#ifndef USE_ESP8266
+  AsyncWebServerResponse *response =
+      request->beginResponse(200, "text/javascript", ESPHOME_WEBSERVER_JS_INCLUDE, ESPHOME_WEBSERVER_JS_INCLUDE_SIZE);
+#else
   AsyncWebServerResponse *response =
       request->beginResponse_P(200, "text/javascript", ESPHOME_WEBSERVER_JS_INCLUDE, ESPHOME_WEBSERVER_JS_INCLUDE_SIZE);
+#endif
   response->addHeader("Content-Encoding", "gzip");
   request->send(response);
 }
@@ -1837,7 +1856,7 @@ std::string WebServer::update_json(update::UpdateEntity *obj, JsonDetail start_c
 }
 #endif
 
-bool WebServer::canHandle(AsyncWebServerRequest *request) {
+bool WebServer::canHandle(AsyncWebServerRequest *request) const {
   if (request->url() == "/")
     return true;
 
@@ -1859,12 +1878,6 @@ bool WebServer::canHandle(AsyncWebServerRequest *request) {
 
 #ifdef USE_WEBSERVER_PRIVATE_NETWORK_ACCESS
   if (request->method() == HTTP_OPTIONS && request->hasHeader(HEADER_CORS_REQ_PNA)) {
-#ifdef USE_ARDUINO
-    // Header needs to be added to interesting header list for it to not be
-    // nuked by the time we handle the request later.
-    // Only required in Arduino framework.
-    request->addInterestingHeader(HEADER_CORS_REQ_PNA);
-#endif
     return true;
   }
 #endif
@@ -2145,7 +2158,7 @@ void WebServer::handleRequest(AsyncWebServerRequest *request) {
 #endif
 }
 
-bool WebServer::isRequestHandlerTrivial() { return false; }
+bool WebServer::isRequestHandlerTrivial() const { return false; }
 
 void WebServer::add_entity_config(EntityBase *entity, float weight, uint64_t group) {
   this->sorting_entitys_[entity] = SortingComponents{weight, group};

esphome/components/web_server/web_server.h

@@ -99,7 +99,7 @@ class DeferredUpdateEventSource : public AsyncEventSource {
  protected:
   // surface a couple methods from the base class
   using AsyncEventSource::handleRequest;
-  using AsyncEventSource::try_send;
+  using AsyncEventSource::send;
 
   ListEntitiesIterator entities_iterator_;
   // vector is used very specifically for its zero memory overhead even though items are popped from the front (memory
@@ -468,11 +468,11 @@ class WebServer : public Controller, public Component, public AsyncWebHandler {
 #endif
 
   /// Override the web handler's canHandle method.
-  bool canHandle(AsyncWebServerRequest *request) override;
+  bool canHandle(AsyncWebServerRequest *request) const override;
   /// Override the web handler's handleRequest method.
   void handleRequest(AsyncWebServerRequest *request) override;
   /// This web handle is not trivial.
-  bool isRequestHandlerTrivial() override;  // NOLINT(readability-identifier-naming)
+  bool isRequestHandlerTrivial() const override;  // NOLINT(readability-identifier-naming)
 
   void add_entity_config(EntityBase *entity, float weight, uint64_t group);
   void add_sorting_group(uint64_t group_id, const std::string &group_name, float weight);

esphome/components/web_server_base/__init__.py

@@ -36,5 +36,7 @@ async def to_code(config):
             cg.add_library("WiFi", None)
             cg.add_library("FS", None)
             cg.add_library("Update", None)
-        # https://github.com/esphome/ESPAsyncWebServer/blob/master/library.json
+        if CORE.is_esp8266:
-        cg.add_library("esphome/ESPAsyncWebServer-esphome", "3.3.0")
+            cg.add_library("ESP8266WiFi", None)
+        # https://github.com/ESP32Async/ESPAsyncWebServer/blob/main/library.json
+        cg.add_library("ESP32Async/ESPAsyncWebServer", "3.7.8")

esphome/components/web_server_base/web_server_base.h

@@ -23,7 +23,7 @@ class MiddlewareHandler : public AsyncWebHandler {
  public:
   MiddlewareHandler(AsyncWebHandler *next) : next_(next) {}
 
-  bool canHandle(AsyncWebServerRequest *request) override { return next_->canHandle(request); }
+  bool canHandle(AsyncWebServerRequest *request) const override { return next_->canHandle(request); }
   void handleRequest(AsyncWebServerRequest *request) override { next_->handleRequest(request); }
   void handleUpload(AsyncWebServerRequest *request, const String &filename, size_t index, uint8_t *data, size_t len,
                     bool final) override {
@@ -32,7 +32,7 @@ class MiddlewareHandler : public AsyncWebHandler {
   void handleBody(AsyncWebServerRequest *request, uint8_t *data, size_t len, size_t index, size_t total) override {
     next_->handleBody(request, data, len, index, total);
   }
-  bool isRequestHandlerTrivial() override { return next_->isRequestHandlerTrivial(); }
+  bool isRequestHandlerTrivial() const override { return next_->isRequestHandlerTrivial(); }
 
  protected:
   AsyncWebHandler *next_;
@@ -131,12 +131,12 @@ class OTARequestHandler : public AsyncWebHandler {
   void handleRequest(AsyncWebServerRequest *request) override;
   void handleUpload(AsyncWebServerRequest *request, const String &filename, size_t index, uint8_t *data, size_t len,
                     bool final) override;
-  bool canHandle(AsyncWebServerRequest *request) override {
+  bool canHandle(AsyncWebServerRequest *request) const override {
     return request->url() == "/update" && request->method() == HTTP_POST;
   }
 
   // NOLINTNEXTLINE(readability-identifier-naming)
-  bool isRequestHandlerTrivial() override { return false; }
+  bool isRequestHandlerTrivial() const override { return false; }
 
  protected:
   uint32_t last_ota_progress_{0};

esphome/components/web_server_idf/web_server_idf.h

@@ -135,8 +135,8 @@ class AsyncWebServerRequest {
     return res;
   }
   // NOLINTNEXTLINE(readability-identifier-naming)
-  AsyncWebServerResponse *beginResponse_P(int code, const char *content_type, const uint8_t *data,
+  AsyncWebServerResponse *beginResponse(int code, const char *content_type, const uint8_t *data,
-                                          const size_t data_size) {
+                                        const size_t data_size) {
     auto *res = new AsyncWebServerResponseProgmem(this, data, data_size);  // NOLINT(cppcoreguidelines-owning-memory)
     this->init_response_(res, code, content_type);
     return res;
@@ -211,7 +211,7 @@ class AsyncWebHandler {
  public:
   virtual ~AsyncWebHandler() {}
   // NOLINTNEXTLINE(readability-identifier-naming)
-  virtual bool canHandle(AsyncWebServerRequest *request) { return false; }
+  virtual bool canHandle(AsyncWebServerRequest *request) const { return false; }
   // NOLINTNEXTLINE(readability-identifier-naming)
   virtual void handleRequest(AsyncWebServerRequest *request) {}
   // NOLINTNEXTLINE(readability-identifier-naming)
@@ -220,7 +220,7 @@ class AsyncWebHandler {
   // NOLINTNEXTLINE(readability-identifier-naming)
   virtual void handleBody(AsyncWebServerRequest *request, uint8_t *data, size_t len, size_t index, size_t total) {}
   // NOLINTNEXTLINE(readability-identifier-naming)
-  virtual bool isRequestHandlerTrivial() { return true; }
+  virtual bool isRequestHandlerTrivial() const { return true; }
 };
 
 #ifdef USE_WEBSERVER
@@ -290,7 +290,7 @@ class AsyncEventSource : public AsyncWebHandler {
   ~AsyncEventSource() override;
 
   // NOLINTNEXTLINE(readability-identifier-naming)
-  bool canHandle(AsyncWebServerRequest *request) override {
+  bool canHandle(AsyncWebServerRequest *request) const override {
     return request->method() == HTTP_GET && request->url() == this->url_;
   }
   // NOLINTNEXTLINE(readability-identifier-naming)

esphome/components/xiaomi_ble/xiaomi_ble.cpp

@@ -91,6 +91,13 @@ bool parse_xiaomi_value(uint16_t value_type, const uint8_t *data, uint8_t value_
   // MiaoMiaoce humidity, 1 byte, 8-bit unsigned integer, 1 %
   else if ((value_type == 0x4C02) && (value_length == 1)) {
     result.humidity = data[0];
+  }
+  // XMWSDJ04MMC humidity, 4 bytes, float, 0.1 °C
+  else if ((value_type == 0x4C08) && (value_length == 4)) {
+    const uint32_t int_number = encode_uint32(data[3], data[2], data[1], data[0]);
+    float humidity;
+    std::memcpy(&humidity, &int_number, sizeof(humidity));
+    result.humidity = humidity;
   } else {
     return false;
   }
@@ -219,6 +226,11 @@ optional<XiaomiParseResult> parse_xiaomi_header(const esp32_ble_tracker::Service
   } else if (device_uuid == 0x055b) {  // small square body, segment LCD, encrypted
     result.type = XiaomiParseResult::TYPE_LYWSD03MMC;
     result.name = "LYWSD03MMC";
+  } else if (device_uuid == 0x1203) {  // small square body, e-ink display, encrypted
+    result.type = XiaomiParseResult::TYPE_XMWSDJ04MMC;
+    result.name = "XMWSDJ04MMC";
+    if (raw.size() == 19)
+      result.raw_offset -= 6;
   } else if (device_uuid == 0x07f6) {  // Xiaomi-Yeelight BLE nightlight
     result.type = XiaomiParseResult::TYPE_MJYD02YLA;
     result.name = "MJYD02YLA";

esphome/components/xiaomi_ble/xiaomi_ble.h

@@ -20,6 +20,7 @@ struct XiaomiParseResult {
     TYPE_LYWSD02MMC,
     TYPE_CGG1,
     TYPE_LYWSD03MMC,
+    TYPE_XMWSDJ04MMC,
     TYPE_CGD1,
     TYPE_CGDK2,
     TYPE_JQJCY01YM,

esphome/components/xiaomi_xmwsdj04mmc/sensor.py

@@ -0,0 +1,77 @@
+import esphome.codegen as cg
+from esphome.components import esp32_ble_tracker, sensor
+import esphome.config_validation as cv
+from esphome.const import (
+    CONF_BATTERY_LEVEL,
+    CONF_BINDKEY,
+    CONF_HUMIDITY,
+    CONF_ID,
+    CONF_MAC_ADDRESS,
+    CONF_TEMPERATURE,
+    DEVICE_CLASS_BATTERY,
+    DEVICE_CLASS_HUMIDITY,
+    DEVICE_CLASS_TEMPERATURE,
+    ENTITY_CATEGORY_DIAGNOSTIC,
+    STATE_CLASS_MEASUREMENT,
+    UNIT_CELSIUS,
+    UNIT_PERCENT,
+)
+
+AUTO_LOAD = ["xiaomi_ble"]
+CODEOWNERS = ["@medusalix"]
+DEPENDENCIES = ["esp32_ble_tracker"]
+
+xiaomi_xmwsdj04mmc_ns = cg.esphome_ns.namespace("xiaomi_xmwsdj04mmc")
+XiaomiXMWSDJ04MMC = xiaomi_xmwsdj04mmc_ns.class_(
+    "XiaomiXMWSDJ04MMC", esp32_ble_tracker.ESPBTDeviceListener, cg.Component
+)
+
+CONFIG_SCHEMA = (
+    cv.Schema(
+        {
+            cv.GenerateID(): cv.declare_id(XiaomiXMWSDJ04MMC),
+            cv.Required(CONF_BINDKEY): cv.bind_key,
+            cv.Required(CONF_MAC_ADDRESS): cv.mac_address,
+            cv.Optional(CONF_TEMPERATURE): sensor.sensor_schema(
+                unit_of_measurement=UNIT_CELSIUS,
+                accuracy_decimals=1,
+                device_class=DEVICE_CLASS_TEMPERATURE,
+                state_class=STATE_CLASS_MEASUREMENT,
+            ),
+            cv.Optional(CONF_HUMIDITY): sensor.sensor_schema(
+                unit_of_measurement=UNIT_PERCENT,
+                accuracy_decimals=0,
+                device_class=DEVICE_CLASS_HUMIDITY,
+                state_class=STATE_CLASS_MEASUREMENT,
+            ),
+            cv.Optional(CONF_BATTERY_LEVEL): sensor.sensor_schema(
+                unit_of_measurement=UNIT_PERCENT,
+                accuracy_decimals=0,
+                device_class=DEVICE_CLASS_BATTERY,
+                state_class=STATE_CLASS_MEASUREMENT,
+                entity_category=ENTITY_CATEGORY_DIAGNOSTIC,
+            ),
+        }
+    )
+    .extend(esp32_ble_tracker.ESP_BLE_DEVICE_SCHEMA)
+    .extend(cv.COMPONENT_SCHEMA)
+)
+
+
+async def to_code(config):
+    var = cg.new_Pvariable(config[CONF_ID])
+    await cg.register_component(var, config)
+    await esp32_ble_tracker.register_ble_device(var, config)
+
+    cg.add(var.set_address(config[CONF_MAC_ADDRESS].as_hex))
+    cg.add(var.set_bindkey(config[CONF_BINDKEY]))
+
+    if temperature_config := config.get(CONF_TEMPERATURE):
+        sens = await sensor.new_sensor(temperature_config)
+        cg.add(var.set_temperature(sens))
+    if humidity_config := config.get(CONF_HUMIDITY):
+        sens = await sensor.new_sensor(humidity_config)
+        cg.add(var.set_humidity(sens))
+    if battery_level_config := config.get(CONF_BATTERY_LEVEL):
+        sens = await sensor.new_sensor(battery_level_config)
+        cg.add(var.set_battery_level(sens))

esphome/components/xiaomi_xmwsdj04mmc/xiaomi_xmwsdj04mmc.cpp

@@ -0,0 +1,77 @@
+#include "xiaomi_xmwsdj04mmc.h"
+#include "esphome/core/log.h"
+
+#ifdef USE_ESP32
+
+namespace esphome {
+namespace xiaomi_xmwsdj04mmc {
+
+static const char *const TAG = "xiaomi_xmwsdj04mmc";
+
+void XiaomiXMWSDJ04MMC::dump_config() {
+  ESP_LOGCONFIG(TAG, "Xiaomi XMWSDJ04MMC");
+  ESP_LOGCONFIG(TAG, "  Bindkey: %s", format_hex_pretty(this->bindkey_, 16).c_str());
+  LOG_SENSOR("  ", "Temperature", this->temperature_);
+  LOG_SENSOR("  ", "Humidity", this->humidity_);
+  LOG_SENSOR("  ", "Battery Level", this->battery_level_);
+}
+
+bool XiaomiXMWSDJ04MMC::parse_device(const esp32_ble_tracker::ESPBTDevice &device) {
+  if (device.address_uint64() != this->address_) {
+    ESP_LOGVV(TAG, "parse_device(): unknown MAC address.");
+    return false;
+  }
+  ESP_LOGVV(TAG, "parse_device(): MAC address %s found.", device.address_str().c_str());
+
+  bool success = false;
+  for (auto &service_data : device.get_service_datas()) {
+    auto res = xiaomi_ble::parse_xiaomi_header(service_data);
+    if (!res.has_value()) {
+      continue;
+    }
+    if (res->is_duplicate) {
+      continue;
+    }
+    if (res->has_encryption &&
+        (!(xiaomi_ble::decrypt_xiaomi_payload(const_cast<std::vector<uint8_t> &>(service_data.data), this->bindkey_,
+                                              this->address_)))) {
+      continue;
+    }
+    if (!(xiaomi_ble::parse_xiaomi_message(service_data.data, *res))) {
+      continue;
+    }
+    if (res->humidity.has_value() && this->humidity_ != nullptr) {
+      // see https://github.com/custom-components/sensor.mitemp_bt/issues/7#issuecomment-595948254
+      *res->humidity = trunc(*res->humidity);
+    }
+    if (!(xiaomi_ble::report_xiaomi_results(res, device.address_str()))) {
+      continue;
+    }
+    if (res->temperature.has_value() && this->temperature_ != nullptr)
+      this->temperature_->publish_state(*res->temperature);
+    if (res->humidity.has_value() && this->humidity_ != nullptr)
+      this->humidity_->publish_state(*res->humidity);
+    if (res->battery_level.has_value() && this->battery_level_ != nullptr)
+      this->battery_level_->publish_state(*res->battery_level);
+    success = true;
+  }
+
+  return success;
+}
+
+void XiaomiXMWSDJ04MMC::set_bindkey(const std::string &bindkey) {
+  memset(this->bindkey_, 0, 16);
+  if (bindkey.size() != 32) {
+    return;
+  }
+  char temp[3] = {0};
+  for (int i = 0; i < 16; i++) {
+    strncpy(temp, &(bindkey.c_str()[i * 2]), 2);
+    this->bindkey_[i] = std::strtoul(temp, nullptr, 16);
+  }
+}
+
+}  // namespace xiaomi_xmwsdj04mmc
+}  // namespace esphome
+
+#endif

esphome/components/xiaomi_xmwsdj04mmc/xiaomi_xmwsdj04mmc.h

@@ -0,0 +1,37 @@
+#pragma once
+
+#include "esphome/core/component.h"
+#include "esphome/components/sensor/sensor.h"
+#include "esphome/components/esp32_ble_tracker/esp32_ble_tracker.h"
+#include "esphome/components/xiaomi_ble/xiaomi_ble.h"
+
+#ifdef USE_ESP32
+
+namespace esphome {
+namespace xiaomi_xmwsdj04mmc {
+
+class XiaomiXMWSDJ04MMC : public Component, public esp32_ble_tracker::ESPBTDeviceListener {
+ public:
+  void set_address(uint64_t address) { this->address_ = address; }
+  void set_bindkey(const std::string &bindkey);
+
+  bool parse_device(const esp32_ble_tracker::ESPBTDevice &device) override;
+
+  void dump_config() override;
+  float get_setup_priority() const override { return setup_priority::DATA; }
+  void set_temperature(sensor::Sensor *temperature) { this->temperature_ = temperature; }
+  void set_humidity(sensor::Sensor *humidity) { this->humidity_ = humidity; }
+  void set_battery_level(sensor::Sensor *battery_level) { this->battery_level_ = battery_level; }
+
+ protected:
+  uint64_t address_;
+  uint8_t bindkey_[16];
+  sensor::Sensor *temperature_{nullptr};
+  sensor::Sensor *humidity_{nullptr};
+  sensor::Sensor *battery_level_{nullptr};
+};
+
+}  // namespace xiaomi_xmwsdj04mmc
+}  // namespace esphome
+
+#endif

esphome/core/application.cpp

@@ -97,7 +97,13 @@ void Application::loop() {
   // Feed WDT with time
   this->feed_wdt(last_op_end_time);
 
-  for (Component *component : this->looping_components_) {
+  // Mark that we're in the loop for safe reentrant modifications
+  this->in_loop_ = true;
+
+  for (this->current_loop_index_ = 0; this->current_loop_index_ < this->looping_components_active_end_;
+       this->current_loop_index_++) {
+    Component *component = this->looping_components_[this->current_loop_index_];
+
     // Update the cached time before each component runs
     this->loop_component_start_time_ = last_op_end_time;
 
@@ -112,6 +118,8 @@ void Application::loop() {
     this->app_state_ |= new_app_state;
     this->feed_wdt(last_op_end_time);
   }
+
+  this->in_loop_ = false;
   this->app_state_ = new_app_state;
 
   // Use the last component's end time instead of calling millis() again
@@ -235,9 +243,66 @@ void Application::teardown_components(uint32_t timeout_ms) {
 }
 
 void Application::calculate_looping_components_() {
+  // First add all active components
   for (auto *obj : this->components_) {
-    if (obj->has_overridden_loop())
+    if (obj->has_overridden_loop() &&
+        (obj->get_component_state() & COMPONENT_STATE_MASK) != COMPONENT_STATE_LOOP_DONE) {
       this->looping_components_.push_back(obj);
+    }
+  }
+
+  this->looping_components_active_end_ = this->looping_components_.size();
+
+  // Then add all inactive (LOOP_DONE) components
+  // This handles components that called disable_loop() during setup, before this method runs
+  for (auto *obj : this->components_) {
+    if (obj->has_overridden_loop() &&
+        (obj->get_component_state() & COMPONENT_STATE_MASK) == COMPONENT_STATE_LOOP_DONE) {
+      this->looping_components_.push_back(obj);
+    }
+  }
+}
+
+void Application::disable_component_loop_(Component *component) {
+  // This method must be reentrant - components can disable themselves during their own loop() call
+  // Linear search to find component in active section
+  // Most configs have 10-30 looping components (30 is on the high end)
+  // O(n) is acceptable here as we optimize for memory, not complexity
+  for (uint16_t i = 0; i < this->looping_components_active_end_; i++) {
+    if (this->looping_components_[i] == component) {
+      // Move last active component to this position
+      this->looping_components_active_end_--;
+      if (i != this->looping_components_active_end_) {
+        std::swap(this->looping_components_[i], this->looping_components_[this->looping_components_active_end_]);
+
+        // If we're currently iterating and just swapped the current position
+        if (this->in_loop_ && i == this->current_loop_index_) {
+          // Decrement so we'll process the swapped component next
+          this->current_loop_index_--;
+        }
+      }
+      return;
+    }
+  }
+}
+
+void Application::enable_component_loop_(Component *component) {
+  // This method must be reentrant - components can re-enable themselves during their own loop() call
+  // Single pass through all components to find and move if needed
+  // With typical 10-30 components, O(n) is faster than maintaining a map
+  const uint16_t size = this->looping_components_.size();
+  for (uint16_t i = 0; i < size; i++) {
+    if (this->looping_components_[i] == component) {
+      if (i < this->looping_components_active_end_) {
+        return;  // Already active
+      }
+      // Found in inactive section - move to active
+      if (i != this->looping_components_active_end_) {
+        std::swap(this->looping_components_[i], this->looping_components_[this->looping_components_active_end_]);
+      }
+      this->looping_components_active_end_++;
+      return;
+    }
   }
 }
 

esphome/core/application.h

@@ -572,13 +572,41 @@ class Application {
 
   void calculate_looping_components_();
 
+  // These methods are called by Component::disable_loop() and Component::enable_loop()
+  // Components should not call these directly - use this->disable_loop() or this->enable_loop()
+  // to ensure component state is properly updated along with the loop partition
+  void disable_component_loop_(Component *component);
+  void enable_component_loop_(Component *component);
+
   void feed_wdt_arch_();
 
   /// Perform a delay while also monitoring socket file descriptors for readiness
   void yield_with_select_(uint32_t delay_ms);
 
   std::vector<Component *> components_{};
+
+  // Partitioned vector design for looping components
+  // =================================================
+  // Components are partitioned into [active | inactive] sections:
+  //
+  // looping_components_: [A, B, C, D | E, F]
+  //                                  ^
+  //                      looping_components_active_end_ (4)
+  //
+  // - Components A,B,C,D are active and will be called in loop()
+  // - Components E,F are inactive (disabled/failed) and won't be called
+  // - No flag checking needed during iteration - just loop 0 to active_end_
+  // - When a component is disabled, it's swapped with the last active component
+  //   and active_end_ is decremented
+  // - When a component is enabled, it's swapped with the first inactive component
+  //   and active_end_ is incremented
+  // - This eliminates branch mispredictions from flag checking in the hot loop
   std::vector<Component *> looping_components_{};
+  uint16_t looping_components_active_end_{0};
+
+  // For safe reentrant modifications during iteration
+  uint16_t current_loop_index_{0};
+  bool in_loop_{false};
 
 #ifdef USE_BINARY_SENSOR
   std::vector<binary_sensor::BinarySensor *> binary_sensors_{};

esphome/core/component.cpp

@@ -30,17 +30,18 @@ const float LATE = -100.0f;
 
 }  // namespace setup_priority
 
-// Component state uses bits 0-1 (4 states)
+// Component state uses bits 0-2 (8 states, 5 used)
-const uint8_t COMPONENT_STATE_MASK = 0x03;
+const uint8_t COMPONENT_STATE_MASK = 0x07;
 const uint8_t COMPONENT_STATE_CONSTRUCTION = 0x00;
 const uint8_t COMPONENT_STATE_SETUP = 0x01;
 const uint8_t COMPONENT_STATE_LOOP = 0x02;
 const uint8_t COMPONENT_STATE_FAILED = 0x03;
-// Status LED uses bits 2-3
+const uint8_t COMPONENT_STATE_LOOP_DONE = 0x04;
-const uint8_t STATUS_LED_MASK = 0x0C;
+// Status LED uses bits 3-4
+const uint8_t STATUS_LED_MASK = 0x18;
 const uint8_t STATUS_LED_OK = 0x00;
-const uint8_t STATUS_LED_WARNING = 0x04;  // Bit 2
+const uint8_t STATUS_LED_WARNING = 0x08;  // Bit 3
-const uint8_t STATUS_LED_ERROR = 0x08;    // Bit 3
+const uint8_t STATUS_LED_ERROR = 0x10;    // Bit 4
 
 const uint16_t WARN_IF_BLOCKING_OVER_MS = 50U;       ///< Initial blocking time allowed without warning
 const uint16_t WARN_IF_BLOCKING_INCREMENT_MS = 10U;  ///< How long the blocking time must be larger to warn again
@@ -113,6 +114,9 @@ void Component::call() {
     case COMPONENT_STATE_FAILED:  // NOLINT(bugprone-branch-clone)
       // State failed: Do nothing
       break;
+    case COMPONENT_STATE_LOOP_DONE:  // NOLINT(bugprone-branch-clone)
+      // State loop done: Do nothing, component has finished its work
+      break;
     default:
       break;
   }
@@ -136,14 +140,30 @@ bool Component::should_warn_of_blocking(uint32_t blocking_time) {
   return false;
 }
 void Component::mark_failed() {
-  ESP_LOGE(TAG, "Component %s was marked as failed.", this->get_component_source());
+  ESP_LOGE(TAG, "Component %s was marked as failed", this->get_component_source());
   this->component_state_ &= ~COMPONENT_STATE_MASK;
   this->component_state_ |= COMPONENT_STATE_FAILED;
   this->status_set_error();
+  // Also remove from loop since failed components shouldn't loop
+  App.disable_component_loop_(this);
+}
+void Component::disable_loop() {
+  ESP_LOGD(TAG, "%s loop disabled", this->get_component_source());
+  this->component_state_ &= ~COMPONENT_STATE_MASK;
+  this->component_state_ |= COMPONENT_STATE_LOOP_DONE;
+  App.disable_component_loop_(this);
+}
+void Component::enable_loop() {
+  if ((this->component_state_ & COMPONENT_STATE_MASK) == COMPONENT_STATE_LOOP_DONE) {
+    ESP_LOGD(TAG, "%s loop enabled", this->get_component_source());
+    this->component_state_ &= ~COMPONENT_STATE_MASK;
+    this->component_state_ |= COMPONENT_STATE_LOOP;
+    App.enable_component_loop_(this);
+  }
 }
 void Component::reset_to_construction_state() {
   if ((this->component_state_ & COMPONENT_STATE_MASK) == COMPONENT_STATE_FAILED) {
-    ESP_LOGI(TAG, "Component %s is being reset to construction state.", this->get_component_source());
+    ESP_LOGI(TAG, "Component %s is being reset to construction state", this->get_component_source());
     this->component_state_ &= ~COMPONENT_STATE_MASK;
     this->component_state_ |= COMPONENT_STATE_CONSTRUCTION;
     // Clear error status when resetting
@@ -276,8 +296,8 @@ uint32_t WarnIfComponentBlockingGuard::finish() {
   }
   if (should_warn) {
     const char *src = component_ == nullptr ? "<null>" : component_->get_component_source();
-    ESP_LOGW(TAG, "Component %s took a long time for an operation (%" PRIu32 " ms).", src, blocking_time);
+    ESP_LOGW(TAG, "Component %s took a long time for an operation (%" PRIu32 " ms)", src, blocking_time);
-    ESP_LOGW(TAG, "Components should block for at most 30 ms.");
+    ESP_LOGW(TAG, "Components should block for at most 30 ms");
   }
 
   return curr_time;

esphome/core/component.h

@@ -58,6 +58,7 @@ extern const uint8_t COMPONENT_STATE_CONSTRUCTION;
 extern const uint8_t COMPONENT_STATE_SETUP;
 extern const uint8_t COMPONENT_STATE_LOOP;
 extern const uint8_t COMPONENT_STATE_FAILED;
+extern const uint8_t COMPONENT_STATE_LOOP_DONE;
 extern const uint8_t STATUS_LED_MASK;
 extern const uint8_t STATUS_LED_OK;
 extern const uint8_t STATUS_LED_WARNING;
@@ -150,6 +151,26 @@ class Component {
     this->mark_failed();
   }
 
+  /** Disable this component's loop. The loop() method will no longer be called.
+   *
+   * This is useful for components that only need to run for a certain period of time
+   * or when inactive, saving CPU cycles.
+   *
+   * @note Components should call this->disable_loop() on themselves, not on other components.
+   *       This ensures the component's state is properly updated along with the loop partition.
+   */
+  void disable_loop();
+
+  /** Enable this component's loop. The loop() method will be called normally.
+   *
+   * This is useful for components that transition between active and inactive states
+   * and need to re-enable their loop() method when becoming active again.
+   *
+   * @note Components should call this->enable_loop() on themselves, not on other components.
+   *       This ensures the component's state is properly updated along with the loop partition.
+   */
+  void enable_loop();
+
   bool is_failed() const;
 
   bool is_ready() const;

esphome/cpp_types.py

@@ -29,7 +29,9 @@ Component = esphome_ns.class_("Component")
 ComponentPtr = Component.operator("ptr")
 PollingComponent = esphome_ns.class_("PollingComponent", Component)
 Application = esphome_ns.class_("Application")
-optional = esphome_ns.class_("optional")
+# Create optional with explicit namespace to avoid ambiguity with std::optional
+# The generated code will use esphome::optional instead of just optional
+optional = global_ns.namespace("esphome").class_("optional")
 arduino_json_ns = global_ns.namespace("ArduinoJson")
 JsonObject = arduino_json_ns.class_("JsonObject")
 JsonObjectConst = arduino_json_ns.class_("JsonObjectConst")

platformio.ini

@@ -65,14 +65,14 @@ lib_deps =
     SPI                                                   ; spi (Arduino built-in)
     Wire                                                  ; i2c (Arduino built-int)
     heman/AsyncMqttClient-esphome@1.0.0                   ; mqtt
-    esphome/ESPAsyncWebServer-esphome@3.3.0               ; web_server_base
+    ESP32Async/ESPAsyncWebServer@3.7.8                    ; web_server_base
     fastled/FastLED@3.9.16                                ; fastled_base
     mikalhart/TinyGPSPlus@1.1.0                           ; gps
     freekode/TM1651@1.0.1                                 ; tm1651
     glmnet/Dsmr@0.7                                       ; dsmr
     rweather/Crypto@0.4.0                                 ; dsmr
     dudanov/MideaUART@1.1.9                               ; midea
-    tonia/HeatpumpIR@1.0.32                               ; heatpumpir
+    tonia/HeatpumpIR@1.0.35                               ; heatpumpir
 build_flags =
     ${common.build_flags}
     -DUSE_ARDUINO
@@ -100,7 +100,7 @@ lib_deps =
     ${common:arduino.lib_deps}
     ESP8266WiFi                           ; wifi (Arduino built-in)
     Update                                ; ota (Arduino built-in)
-    esphome/ESPAsyncTCP-esphome@2.0.0     ; async_tcp
+    ESP32Async/ESPAsyncTCP@2.0.0          ; async_tcp
     ESP8266HTTPClient                     ; http_request (Arduino built-in)
     ESP8266mDNS                           ; mdns (Arduino built-in)
     DNSServer                             ; captive_portal (Arduino built-in)
@@ -130,12 +130,12 @@ lib_deps =
     WiFi                                 ; wifi,web_server_base,ethernet (Arduino built-in)
     Update                               ; ota,web_server_base (Arduino built-in)
     ${common:arduino.lib_deps}
-    esphome/AsyncTCP-esphome@2.1.4       ; async_tcp
+    ESP32Async/AsyncTCP@3.4.4            ; async_tcp
     WiFiClientSecure                     ; http_request,nextion (Arduino built-in)
     HTTPClient                           ; http_request,nextion (Arduino built-in)
     ESPmDNS                              ; mdns (Arduino built-in)
     DNSServer                            ; captive_portal (Arduino built-in)
-    esphome/ESP32-audioI2S@2.2.0         ; i2s_audio
+    esphome/ESP32-audioI2S@2.3.0         ; i2s_audio
     droscy/esp_wireguard@0.4.2           ; wireguard
     esphome/esp-audio-libs@1.1.4         ; audio
 
@@ -200,7 +200,7 @@ build_unflags =
 ; This are common settings for the LibreTiny (all variants) using Arduino.
 [common:libretiny-arduino]
 extends = common:arduino
-platform = libretiny
+platform = libretiny@1.9.1
 framework = arduino
 lib_deps =
     droscy/esp_wireguard@0.4.2    ; wireguard

pyproject.toml

@@ -120,10 +120,12 @@ select = [
 
 ignore = [
   "E501", # line too long
+  "PLC0415", # `import` should be at the top-level of a file
   "PLR0911", # Too many return statements ({returns} > {max_returns})
   "PLR0912", # Too many branches ({branches} > {max_branches})
   "PLR0913", # Too many arguments to function call ({c_args} > {max_args})
   "PLR0915", # Too many statements ({statements} > {max_statements})
+  "PLW1641", # Object does not implement `__hash__` method
   "PLR2004", # Magic value used in comparison, consider replacing {value} with a constant variable
   "PLW2901", # Outer {outer_kind} variable {name} overwritten by inner {inner_kind} target
   "UP038", # https://github.com/astral-sh/ruff/issues/7871 https://github.com/astral-sh/ruff/pull/16681

requirements_test.txt

@@ -1,6 +1,6 @@
 pylint==3.3.7
 flake8==7.2.0  # also change in .pre-commit-config.yaml when updating
-ruff==0.11.13  # also change in .pre-commit-config.yaml when updating
+ruff==0.12.0  # also change in .pre-commit-config.yaml when updating
 pyupgrade==3.20.0  # also change in .pre-commit-config.yaml when updating
 pre-commit
 

tests/component_tests/text/test_text.py

@@ -66,5 +66,5 @@ def test_text_config_lamda_is_set(generate_main):
     main_cpp = generate_main("tests/component_tests/text/test_text.yaml")
 
     # Then
-    assert "it_4->set_template([=]() -> optional<std::string> {" in main_cpp
+    assert "it_4->set_template([=]() -> esphome::optional<std::string> {" in main_cpp
     assert 'return std::string{"Hello"};' in main_cpp

tests/components/esp32_hall/test.esp32-ard.yaml

@@ -1,3 +0,0 @@
-sensor:
-  - platform: esp32_hall
-    name: ESP32 Hall Sensor

tests/components/xiaomi_xmwsdj04mmc/common.yaml

@@ -0,0 +1,12 @@
+esp32_ble_tracker:
+
+sensor:
+  - platform: xiaomi_xmwsdj04mmc
+    mac_address: 84:B4:DB:5D:A3:8F
+    bindkey: d8ca2ed09bb5541dc8f045ca360b00ea
+    temperature:
+      name: Xiaomi XMWSDJ04MMC Temperature
+    humidity:
+      name: Xiaomi XMWSDJ04MMC Humidity
+    battery_level:
+      name: Xiaomi XMWSDJ04MMC Battery Level

tests/components/xiaomi_xmwsdj04mmc/test.esp32-ard.yaml

@@ -0,0 +1 @@
+<<: !include common.yaml

tests/components/xiaomi_xmwsdj04mmc/test.esp32-c3-ard.yaml

@@ -0,0 +1 @@
+<<: !include common.yaml

tests/components/xiaomi_xmwsdj04mmc/test.esp32-c3-idf.yaml

@@ -0,0 +1 @@
+<<: !include common.yaml

tests/components/xiaomi_xmwsdj04mmc/test.esp32-idf.yaml

@@ -0,0 +1 @@
+<<: !include common.yaml

tests/integration/conftest.py

@@ -3,7 +3,7 @@
 from __future__ import annotations
 
 import asyncio
-from collections.abc import AsyncGenerator, Generator
+from collections.abc import AsyncGenerator, Callable, Generator
 from contextlib import AbstractAsyncContextManager, asynccontextmanager
 import logging
 import os
@@ -46,6 +46,7 @@ if platform.system() == "Windows":
         "Integration tests are not supported on Windows", allow_module_level=True
     )
 
+
 import pty  # not available on Windows
 
 
@@ -362,7 +363,10 @@ async def api_client_connected(
 
 
 async def _read_stream_lines(
-    stream: asyncio.StreamReader, lines: list[str], output_stream: TextIO
+    stream: asyncio.StreamReader,
+    lines: list[str],
+    output_stream: TextIO,
+    line_callback: Callable[[str], None] | None = None,
 ) -> None:
     """Read lines from a stream, append to list, and echo to output stream."""
     log_parser = LogParser()
@@ -380,6 +384,9 @@ async def _read_stream_lines(
             file=output_stream,
             flush=True,
         )
+        # Call the callback if provided
+        if line_callback:
+            line_callback(decoded_line.rstrip())
 
 
 @asynccontextmanager
@@ -388,6 +395,7 @@ async def run_binary_and_wait_for_port(
     host: str,
     port: int,
     timeout: float = PORT_WAIT_TIMEOUT,
+    line_callback: Callable[[str], None] | None = None,
 ) -> AsyncGenerator[None]:
     """Run a binary, wait for it to open a port, and clean up on exit."""
     # Create a pseudo-terminal to make the binary think it's running interactively
@@ -435,7 +443,9 @@ async def run_binary_and_wait_for_port(
         # Read from output stream
         output_tasks = [
             asyncio.create_task(
-                _read_stream_lines(output_reader, stdout_lines, sys.stdout)
+                _read_stream_lines(
+                    output_reader, stdout_lines, sys.stdout, line_callback
+                )
             )
         ]
 
@@ -515,6 +525,7 @@ async def run_compiled_context(
     compile_esphome: CompileFunction,
     port: int,
     port_socket: socket.socket | None = None,
+    line_callback: Callable[[str], None] | None = None,
 ) -> AsyncGenerator[None]:
     """Context manager to write, compile and run an ESPHome configuration."""
     # Write the YAML config
@@ -528,7 +539,9 @@ async def run_compiled_context(
         port_socket.close()
 
     # Run the binary and wait for the API server to start
-    async with run_binary_and_wait_for_port(binary_path, LOCALHOST, port):
+    async with run_binary_and_wait_for_port(
+        binary_path, LOCALHOST, port, line_callback=line_callback
+    ):
         yield
 
 
@@ -542,7 +555,9 @@ async def run_compiled(
     port, port_socket = reserved_tcp_port
 
     def _run_compiled(
-        yaml_content: str, filename: str | None = None
+        yaml_content: str,
+        filename: str | None = None,
+        line_callback: Callable[[str], None] | None = None,
     ) -> AbstractAsyncContextManager[asyncio.subprocess.Process]:
         return run_compiled_context(
             yaml_content,
@@ -551,6 +566,7 @@ async def run_compiled(
             compile_esphome,
             port,
             port_socket,
+            line_callback=line_callback,
         )
 
     yield _run_compiled

tests/integration/fixtures/external_components/loop_test_component/__init__.py

@@ -0,0 +1,78 @@
+from esphome import automation
+import esphome.codegen as cg
+import esphome.config_validation as cv
+from esphome.const import CONF_COMPONENTS, CONF_ID, CONF_NAME
+
+CODEOWNERS = ["@esphome/tests"]
+
+loop_test_component_ns = cg.esphome_ns.namespace("loop_test_component")
+LoopTestComponent = loop_test_component_ns.class_("LoopTestComponent", cg.Component)
+
+CONF_DISABLE_AFTER = "disable_after"
+CONF_TEST_REDUNDANT_OPERATIONS = "test_redundant_operations"
+
+COMPONENT_CONFIG_SCHEMA = cv.Schema(
+    {
+        cv.GenerateID(): cv.declare_id(LoopTestComponent),
+        cv.Required(CONF_NAME): cv.string,
+        cv.Optional(CONF_DISABLE_AFTER, default=0): cv.int_,
+        cv.Optional(CONF_TEST_REDUNDANT_OPERATIONS, default=False): cv.boolean,
+    }
+)
+
+CONFIG_SCHEMA = cv.Schema(
+    {
+        cv.GenerateID(): cv.declare_id(LoopTestComponent),
+        cv.Required(CONF_COMPONENTS): cv.ensure_list(COMPONENT_CONFIG_SCHEMA),
+    }
+).extend(cv.COMPONENT_SCHEMA)
+
+# Define actions
+EnableAction = loop_test_component_ns.class_("EnableAction", automation.Action)
+DisableAction = loop_test_component_ns.class_("DisableAction", automation.Action)
+
+
+@automation.register_action(
+    "loop_test_component.enable",
+    EnableAction,
+    cv.Schema(
+        {
+            cv.Required(CONF_ID): cv.use_id(LoopTestComponent),
+        }
+    ),
+)
+async def enable_to_code(config, action_id, template_arg, args):
+    parent = await cg.get_variable(config[CONF_ID])
+    var = cg.new_Pvariable(action_id, template_arg, parent)
+    return var
+
+
+@automation.register_action(
+    "loop_test_component.disable",
+    DisableAction,
+    cv.Schema(
+        {
+            cv.Required(CONF_ID): cv.use_id(LoopTestComponent),
+        }
+    ),
+)
+async def disable_to_code(config, action_id, template_arg, args):
+    parent = await cg.get_variable(config[CONF_ID])
+    var = cg.new_Pvariable(action_id, template_arg, parent)
+    return var
+
+
+async def to_code(config):
+    # The parent config doesn't actually create a component
+    # We just create each sub-component
+    for comp_config in config[CONF_COMPONENTS]:
+        var = cg.new_Pvariable(comp_config[CONF_ID])
+        await cg.register_component(var, comp_config)
+
+        cg.add(var.set_name(comp_config[CONF_NAME]))
+        cg.add(var.set_disable_after(comp_config[CONF_DISABLE_AFTER]))
+        cg.add(
+            var.set_test_redundant_operations(
+                comp_config[CONF_TEST_REDUNDANT_OPERATIONS]
+            )
+        )

tests/integration/fixtures/external_components/loop_test_component/loop_test_component.cpp

@@ -0,0 +1,43 @@
+#include "loop_test_component.h"
+
+namespace esphome {
+namespace loop_test_component {
+
+void LoopTestComponent::setup() { ESP_LOGI(TAG, "[%s] Setup called", this->name_.c_str()); }
+
+void LoopTestComponent::loop() {
+  this->loop_count_++;
+  ESP_LOGI(TAG, "[%s] Loop count: %d", this->name_.c_str(), this->loop_count_);
+
+  // Test self-disable after specified count
+  if (this->disable_after_ > 0 && this->loop_count_ == this->disable_after_) {
+    ESP_LOGI(TAG, "[%s] Disabling self after %d loops", this->name_.c_str(), this->disable_after_);
+    this->disable_loop();
+  }
+
+  // Test redundant operations
+  if (this->test_redundant_operations_ && this->loop_count_ == 5) {
+    if (this->name_ == "redundant_enable") {
+      ESP_LOGI(TAG, "[%s] Testing enable when already enabled", this->name_.c_str());
+      this->enable_loop();
+    } else if (this->name_ == "redundant_disable") {
+      ESP_LOGI(TAG, "[%s] Testing disable when will be disabled", this->name_.c_str());
+      // We'll disable at count 10, but try to disable again at 5
+      this->disable_loop();
+      ESP_LOGI(TAG, "[%s] First disable complete", this->name_.c_str());
+    }
+  }
+}
+
+void LoopTestComponent::service_enable() {
+  ESP_LOGI(TAG, "[%s] Service enable called", this->name_.c_str());
+  this->enable_loop();
+}
+
+void LoopTestComponent::service_disable() {
+  ESP_LOGI(TAG, "[%s] Service disable called", this->name_.c_str());
+  this->disable_loop();
+}
+
+}  // namespace loop_test_component
+}  // namespace esphome

tests/integration/fixtures/external_components/loop_test_component/loop_test_component.h

@@ -0,0 +1,58 @@
+#pragma once
+
+#include "esphome/core/component.h"
+#include "esphome/core/log.h"
+#include "esphome/core/application.h"
+#include "esphome/core/automation.h"
+
+namespace esphome {
+namespace loop_test_component {
+
+static const char *const TAG = "loop_test_component";
+
+class LoopTestComponent : public Component {
+ public:
+  void set_name(const std::string &name) { this->name_ = name; }
+  void set_disable_after(int count) { this->disable_after_ = count; }
+  void set_test_redundant_operations(bool test) { this->test_redundant_operations_ = test; }
+
+  void setup() override;
+  void loop() override;
+
+  // Service methods for external control
+  void service_enable();
+  void service_disable();
+
+  int get_loop_count() const { return this->loop_count_; }
+
+  float get_setup_priority() const override { return setup_priority::DATA; }
+
+ protected:
+  std::string name_;
+  int loop_count_{0};
+  int disable_after_{0};
+  bool test_redundant_operations_{false};
+};
+
+template<typename... Ts> class EnableAction : public Action<Ts...> {
+ public:
+  EnableAction(LoopTestComponent *parent) : parent_(parent) {}
+
+  void play(Ts... x) override { this->parent_->service_enable(); }
+
+ protected:
+  LoopTestComponent *parent_;
+};
+
+template<typename... Ts> class DisableAction : public Action<Ts...> {
+ public:
+  DisableAction(LoopTestComponent *parent) : parent_(parent) {}
+
+  void play(Ts... x) override { this->parent_->service_disable(); }
+
+ protected:
+  LoopTestComponent *parent_;
+};
+
+}  // namespace loop_test_component
+}  // namespace esphome

tests/integration/fixtures/loop_disable_enable.yaml

@@ -0,0 +1,48 @@
+esphome:
+  name: loop-test
+
+host:
+api:
+logger:
+  level: DEBUG
+
+external_components:
+  - source:
+      type: local
+      path: EXTERNAL_COMPONENT_PATH
+
+loop_test_component:
+  components:
+    # Component that disables itself after 10 loops
+    - id: self_disable_10
+      name: "self_disable_10"
+      disable_after: 10
+
+    # Component that never disables itself (for re-enable test)
+    - id: normal_component
+      name: "normal_component"
+      disable_after: 0
+
+    # Component that tests enable when already enabled
+    - id: redundant_enable
+      name: "redundant_enable"
+      test_redundant_operations: true
+      disable_after: 0
+
+    # Component that tests disable when already disabled
+    - id: redundant_disable
+      name: "redundant_disable"
+      test_redundant_operations: true
+      disable_after: 10
+
+# Interval to re-enable the self_disable_10 component after some time
+interval:
+  - interval: 0.5s
+    then:
+      - if:
+          condition:
+            lambda: 'return id(self_disable_10).get_loop_count() == 10;'
+          then:
+            - logger.log: "Re-enabling self_disable_10 via service"
+            - loop_test_component.enable:
+                id: self_disable_10

tests/integration/test_loop_disable_enable.py

@@ -0,0 +1,150 @@
+"""Integration test for loop disable/enable functionality."""
+
+from __future__ import annotations
+
+import asyncio
+from pathlib import Path
+import re
+
+import pytest
+
+from .types import APIClientConnectedFactory, RunCompiledFunction
+
+
+@pytest.mark.asyncio
+async def test_loop_disable_enable(
+    yaml_config: str,
+    run_compiled: RunCompiledFunction,
+    api_client_connected: APIClientConnectedFactory,
+) -> None:
+    """Test that components can disable and enable their loop() method."""
+    # Get the absolute path to the external components directory
+    external_components_path = str(
+        Path(__file__).parent / "fixtures" / "external_components"
+    )
+
+    # Replace the placeholder in the YAML config with the actual path
+    yaml_config = yaml_config.replace(
+        "EXTERNAL_COMPONENT_PATH", external_components_path
+    )
+
+    # Track log messages and events
+    log_messages: list[str] = []
+
+    # Event fired when self_disable_10 component disables itself after 10 loops
+    self_disable_10_disabled = asyncio.Event()
+    # Event fired when normal_component reaches 10 loops
+    normal_component_10_loops = asyncio.Event()
+    # Event fired when redundant_enable component tests enabling when already enabled
+    redundant_enable_tested = asyncio.Event()
+    # Event fired when redundant_disable component tests disabling when already disabled
+    redundant_disable_tested = asyncio.Event()
+    # Event fired when self_disable_10 component is re-enabled and runs again (count > 10)
+    self_disable_10_re_enabled = asyncio.Event()
+
+    # Track loop counts for components
+    self_disable_10_counts: list[int] = []
+    normal_component_counts: list[int] = []
+
+    def on_log_line(line: str) -> None:
+        """Process each log line from the process output."""
+        # Strip ANSI color codes
+        clean_line = re.sub(r"\x1b\[[0-9;]*m", "", line)
+
+        if "loop_test_component" not in clean_line:
+            return
+
+        log_messages.append(clean_line)
+
+        # Track specific events using the cleaned line
+        if "[self_disable_10]" in clean_line:
+            if "Loop count:" in clean_line:
+                # Extract loop count
+                try:
+                    count = int(clean_line.split("Loop count: ")[1])
+                    self_disable_10_counts.append(count)
+                    # Check if component was re-enabled (count > 10)
+                    if count > 10:
+                        self_disable_10_re_enabled.set()
+                except (IndexError, ValueError):
+                    pass
+            elif "Disabling self after 10 loops" in clean_line:
+                self_disable_10_disabled.set()
+
+        elif "[normal_component]" in clean_line and "Loop count:" in clean_line:
+            try:
+                count = int(clean_line.split("Loop count: ")[1])
+                normal_component_counts.append(count)
+                if count >= 10:
+                    normal_component_10_loops.set()
+            except (IndexError, ValueError):
+                pass
+
+        elif (
+            "[redundant_enable]" in clean_line
+            and "Testing enable when already enabled" in clean_line
+        ):
+            redundant_enable_tested.set()
+
+        elif (
+            "[redundant_disable]" in clean_line
+            and "Testing disable when will be disabled" in clean_line
+        ):
+            redundant_disable_tested.set()
+
+    # Write, compile and run the ESPHome device with log callback
+    async with (
+        run_compiled(yaml_config, line_callback=on_log_line),
+        api_client_connected() as client,
+    ):
+        # Verify we can connect and get device info
+        device_info = await client.device_info()
+        assert device_info is not None
+        assert device_info.name == "loop-test"
+
+        # Wait for self_disable_10 to disable itself
+        try:
+            await asyncio.wait_for(self_disable_10_disabled.wait(), timeout=10.0)
+        except asyncio.TimeoutError:
+            pytest.fail("self_disable_10 did not disable itself within 10 seconds")
+
+        # Verify it ran at least 10 times before disabling
+        assert len([c for c in self_disable_10_counts if c <= 10]) == 10, (
+            f"Expected exactly 10 loops before disable, got {[c for c in self_disable_10_counts if c <= 10]}"
+        )
+        assert self_disable_10_counts[:10] == list(range(1, 11)), (
+            f"Expected first 10 counts to be 1-10, got {self_disable_10_counts[:10]}"
+        )
+
+        # Wait for normal_component to run at least 10 times
+        try:
+            await asyncio.wait_for(normal_component_10_loops.wait(), timeout=10.0)
+        except asyncio.TimeoutError:
+            pytest.fail(
+                f"normal_component did not reach 10 loops within timeout, got {len(normal_component_counts)}"
+            )
+
+        # Wait for redundant operation tests
+        try:
+            await asyncio.wait_for(redundant_enable_tested.wait(), timeout=10.0)
+        except asyncio.TimeoutError:
+            pytest.fail("redundant_enable did not test enabling when already enabled")
+
+        try:
+            await asyncio.wait_for(redundant_disable_tested.wait(), timeout=10.0)
+        except asyncio.TimeoutError:
+            pytest.fail(
+                "redundant_disable did not test disabling when will be disabled"
+            )
+
+        # Wait to see if self_disable_10 gets re-enabled
+        try:
+            await asyncio.wait_for(self_disable_10_re_enabled.wait(), timeout=5.0)
+        except asyncio.TimeoutError:
+            pytest.fail("self_disable_10 was not re-enabled within 5 seconds")
+
+        # Component was re-enabled - verify it ran more times
+        later_self_disable_counts = [c for c in self_disable_10_counts if c > 10]
+        assert later_self_disable_counts, (
+            "self_disable_10 was re-enabled but did not run additional times"
+        )

tests/integration/types.py

@@ -13,7 +13,19 @@ from aioesphomeapi import APIClient
 ConfigWriter = Callable[[str, str | None], Awaitable[Path]]
 CompileFunction = Callable[[Path], Awaitable[Path]]
 RunFunction = Callable[[Path], Awaitable[asyncio.subprocess.Process]]
-RunCompiledFunction = Callable[[str, str | None], AbstractAsyncContextManager[None]]
+
+
+class RunCompiledFunction(Protocol):
+    """Protocol for run_compiled function with optional line callback."""
+
+    def __call__(  # noqa: E704
+        self,
+        yaml_content: str,
+        filename: str | None = None,
+        line_callback: Callable[[str], None] | None = None,
+    ) -> AbstractAsyncContextManager[None]: ...
+
+
 WaitFunction = Callable[[APIClient, float], Awaitable[bool]]