[API] Sub devices and areas (#8544)

Co-authored-by: J. Nick Koston <nick@koston.org>
Co-authored-by: Jesse Hills <3060199+jesserockz@users.noreply.github.com>
Co-authored-by: J. Nick Koston <nick+github@koston.org>

esphome/components/alarm_control_panel/__init__.py

@@ -14,8 +14,8 @@ from esphome.const import (
     CONF_WEB_SERVER,
 )
 from esphome.core import CORE, coroutine_with_priority
+from esphome.core.entity_helpers import entity_duplicate_validator, setup_entity
 from esphome.cpp_generator import MockObjClass
-from esphome.cpp_helpers import setup_entity
 
 CODEOWNERS = ["@grahambrown11", "@hwstar"]
 IS_PLATFORM_COMPONENT = True
@@ -149,6 +149,9 @@ _ALARM_CONTROL_PANEL_SCHEMA = (
 )
 
 
+_ALARM_CONTROL_PANEL_SCHEMA.add_extra(entity_duplicate_validator("alarm_control_panel"))
+
+
 def alarm_control_panel_schema(
     class_: MockObjClass,
     *,
@@ -190,7 +193,7 @@ ALARM_CONTROL_PANEL_CONDITION_SCHEMA = maybe_simple_id(
 
 
 async def setup_alarm_control_panel_core_(var, config):
-    await setup_entity(var, config)
+    await setup_entity(var, config, "alarm_control_panel")
     for conf in config.get(CONF_ON_STATE, []):
         trigger = cg.new_Pvariable(conf[CONF_TRIGGER_ID], var)
         await automation.build_automation(trigger, [], conf)

esphome/components/api/api.proto

@@ -188,6 +188,17 @@ message DeviceInfoRequest {
   // Empty
 }
 
+message AreaInfo {
+  uint32 area_id = 1;
+  string name = 2;
+}
+
+message DeviceInfo {
+  uint32 device_id = 1;
+  string name = 2;
+  uint32 area_id = 3;
+}
+
 message DeviceInfoResponse {
   option (id) = 10;
   option (source) = SOURCE_SERVER;
@@ -236,6 +247,12 @@ message DeviceInfoResponse {
 
   // Supports receiving and saving api encryption key
   bool api_encryption_supported = 19;
+
+  repeated DeviceInfo devices = 20;
+  repeated AreaInfo areas = 21;
+
+  // Top-level area info to phase out suggested_area
+  AreaInfo area = 22;
 }
 
 message ListEntitiesRequest {
@@ -280,6 +297,7 @@ message ListEntitiesBinarySensorResponse {
   bool disabled_by_default = 7;
   string icon = 8;
   EntityCategory entity_category = 9;
+  uint32 device_id = 10;
 }
 message BinarySensorStateResponse {
   option (id) = 21;
@@ -315,6 +333,7 @@ message ListEntitiesCoverResponse {
   string icon = 10;
   EntityCategory entity_category = 11;
   bool supports_stop = 12;
+  uint32 device_id = 13;
 }
 
 enum LegacyCoverState {
@@ -388,6 +407,7 @@ message ListEntitiesFanResponse {
   string icon = 10;
   EntityCategory entity_category = 11;
   repeated string supported_preset_modes = 12;
+  uint32 device_id = 13;
 }
 enum FanSpeed {
   FAN_SPEED_LOW = 0;
@@ -471,6 +491,7 @@ message ListEntitiesLightResponse {
   bool disabled_by_default = 13;
   string icon = 14;
   EntityCategory entity_category = 15;
+  uint32 device_id = 16;
 }
 message LightStateResponse {
   option (id) = 24;
@@ -563,6 +584,7 @@ message ListEntitiesSensorResponse {
   SensorLastResetType legacy_last_reset_type = 11;
   bool disabled_by_default = 12;
   EntityCategory entity_category = 13;
+  uint32 device_id = 14;
 }
 message SensorStateResponse {
   option (id) = 25;
@@ -595,6 +617,7 @@ message ListEntitiesSwitchResponse {
   bool disabled_by_default = 7;
   EntityCategory entity_category = 8;
   string device_class = 9;
+  uint32 device_id = 10;
 }
 message SwitchStateResponse {
   option (id) = 26;
@@ -632,6 +655,7 @@ message ListEntitiesTextSensorResponse {
   bool disabled_by_default = 6;
   EntityCategory entity_category = 7;
   string device_class = 8;
+  uint32 device_id = 9;
 }
 message TextSensorStateResponse {
   option (id) = 27;
@@ -814,6 +838,7 @@ message ListEntitiesCameraResponse {
   bool disabled_by_default = 5;
   string icon = 6;
   EntityCategory entity_category = 7;
+  uint32 device_id = 8;
 }
 
 message CameraImageResponse {
@@ -916,6 +941,7 @@ message ListEntitiesClimateResponse {
   bool supports_target_humidity = 23;
   float visual_min_humidity = 24;
   float visual_max_humidity = 25;
+  uint32 device_id = 26;
 }
 message ClimateStateResponse {
   option (id) = 47;
@@ -999,6 +1025,7 @@ message ListEntitiesNumberResponse {
   string unit_of_measurement = 11;
   NumberMode mode = 12;
   string device_class = 13;
+  uint32 device_id = 14;
 }
 message NumberStateResponse {
   option (id) = 50;
@@ -1039,6 +1066,7 @@ message ListEntitiesSelectResponse {
   repeated string options = 6;
   bool disabled_by_default = 7;
   EntityCategory entity_category = 8;
+  uint32 device_id = 9;
 }
 message SelectStateResponse {
   option (id) = 53;
@@ -1081,6 +1109,7 @@ message ListEntitiesSirenResponse {
   bool supports_duration = 8;
   bool supports_volume = 9;
   EntityCategory entity_category = 10;
+  uint32 device_id = 11;
 }
 message SirenStateResponse {
   option (id) = 56;
@@ -1144,6 +1173,7 @@ message ListEntitiesLockResponse {
 
   // Not yet implemented:
   string code_format = 11;
+  uint32 device_id = 12;
 }
 message LockStateResponse {
   option (id) = 59;
@@ -1183,6 +1213,7 @@ message ListEntitiesButtonResponse {
   bool disabled_by_default = 6;
   EntityCategory entity_category = 7;
   string device_class = 8;
+  uint32 device_id = 9;
 }
 message ButtonCommandRequest {
   option (id) = 62;
@@ -1238,6 +1269,8 @@ message ListEntitiesMediaPlayerResponse {
   bool supports_pause = 8;
 
   repeated MediaPlayerSupportedFormat supported_formats = 9;
+
+  uint32 device_id = 10;
 }
 message MediaPlayerStateResponse {
   option (id) = 64;
@@ -1778,6 +1811,7 @@ message ListEntitiesAlarmControlPanelResponse {
   uint32 supported_features = 8;
   bool requires_code = 9;
   bool requires_code_to_arm = 10;
+  uint32 device_id = 11;
 }
 
 message AlarmControlPanelStateResponse {
@@ -1823,6 +1857,7 @@ message ListEntitiesTextResponse {
   uint32 max_length = 9;
   string pattern = 10;
   TextMode mode = 11;
+  uint32 device_id = 12;
 }
 message TextStateResponse {
   option (id) = 98;
@@ -1863,6 +1898,7 @@ message ListEntitiesDateResponse {
   string icon = 5;
   bool disabled_by_default = 6;
   EntityCategory entity_category = 7;
+  uint32 device_id = 8;
 }
 message DateStateResponse {
   option (id) = 101;
@@ -1906,6 +1942,7 @@ message ListEntitiesTimeResponse {
   string icon = 5;
   bool disabled_by_default = 6;
   EntityCategory entity_category = 7;
+  uint32 device_id = 8;
 }
 message TimeStateResponse {
   option (id) = 104;
@@ -1952,6 +1989,7 @@ message ListEntitiesEventResponse {
   string device_class = 8;
 
   repeated string event_types = 9;
+  uint32 device_id = 10;
 }
 message EventResponse {
   option (id) = 108;
@@ -1983,6 +2021,7 @@ message ListEntitiesValveResponse {
   bool assumed_state = 9;
   bool supports_position = 10;
   bool supports_stop = 11;
+  uint32 device_id = 12;
 }
 
 enum ValveOperation {
@@ -2029,6 +2068,7 @@ message ListEntitiesDateTimeResponse {
   string icon = 5;
   bool disabled_by_default = 6;
   EntityCategory entity_category = 7;
+  uint32 device_id = 8;
 }
 message DateTimeStateResponse {
   option (id) = 113;
@@ -2069,6 +2109,7 @@ message ListEntitiesUpdateResponse {
   bool disabled_by_default = 6;
   EntityCategory entity_category = 7;
   string device_class = 8;
+  uint32 device_id = 9;
 }
 message UpdateStateResponse {
   option (id) = 117;

esphome/components/api/api_connection.cpp

@@ -1629,6 +1629,23 @@ DeviceInfoResponse APIConnection::device_info(const DeviceInfoRequest &msg) {
 #endif
 #ifdef USE_API_NOISE
   resp.api_encryption_supported = true;
+#endif
+#ifdef USE_DEVICES
+  for (auto const &device : App.get_devices()) {
+    DeviceInfo device_info;
+    device_info.device_id = device->get_device_id();
+    device_info.name = device->get_name();
+    device_info.area_id = device->get_area_id();
+    resp.devices.push_back(device_info);
+  }
+#endif
+#ifdef USE_AREAS
+  for (auto const &area : App.get_areas()) {
+    AreaInfo area_info;
+    area_info.area_id = area->get_area_id();
+    area_info.name = area->get_name();
+    resp.areas.push_back(area_info);
+  }
 #endif
   return resp;
 }

esphome/components/api/api_connection.h

@@ -301,6 +301,9 @@ class APIConnection : public APIServerConnection {
     response.icon = entity->get_icon();
     response.disabled_by_default = entity->is_disabled_by_default();
     response.entity_category = static_cast<enums::EntityCategory>(entity->get_entity_category());
+#ifdef USE_DEVICES
+    response.device_id = entity->get_device_id();
+#endif
   }
 
   // Helper function to fill common entity state fields

esphome/components/api/api_pb2.cpp

@@ -812,6 +812,103 @@ void PingResponse::dump_to(std::string &out) const { out.append("PingResponse {}
 #ifdef HAS_PROTO_MESSAGE_DUMP
 void DeviceInfoRequest::dump_to(std::string &out) const { out.append("DeviceInfoRequest {}"); }
 #endif
+bool AreaInfo::decode_varint(uint32_t field_id, ProtoVarInt value) {
+  switch (field_id) {
+    case 1: {
+      this->area_id = value.as_uint32();
+      return true;
+    }
+    default:
+      return false;
+  }
+}
+bool AreaInfo::decode_length(uint32_t field_id, ProtoLengthDelimited value) {
+  switch (field_id) {
+    case 2: {
+      this->name = value.as_string();
+      return true;
+    }
+    default:
+      return false;
+  }
+}
+void AreaInfo::encode(ProtoWriteBuffer buffer) const {
+  buffer.encode_uint32(1, this->area_id);
+  buffer.encode_string(2, this->name);
+}
+void AreaInfo::calculate_size(uint32_t &total_size) const {
+  ProtoSize::add_uint32_field(total_size, 1, this->area_id, false);
+  ProtoSize::add_string_field(total_size, 1, this->name, false);
+}
+#ifdef HAS_PROTO_MESSAGE_DUMP
+void AreaInfo::dump_to(std::string &out) const {
+  __attribute__((unused)) char buffer[64];
+  out.append("AreaInfo {\n");
+  out.append("  area_id: ");
+  sprintf(buffer, "%" PRIu32, this->area_id);
+  out.append(buffer);
+  out.append("\n");
+
+  out.append("  name: ");
+  out.append("'").append(this->name).append("'");
+  out.append("\n");
+  out.append("}");
+}
+#endif
+bool DeviceInfo::decode_varint(uint32_t field_id, ProtoVarInt value) {
+  switch (field_id) {
+    case 1: {
+      this->device_id = value.as_uint32();
+      return true;
+    }
+    case 3: {
+      this->area_id = value.as_uint32();
+      return true;
+    }
+    default:
+      return false;
+  }
+}
+bool DeviceInfo::decode_length(uint32_t field_id, ProtoLengthDelimited value) {
+  switch (field_id) {
+    case 2: {
+      this->name = value.as_string();
+      return true;
+    }
+    default:
+      return false;
+  }
+}
+void DeviceInfo::encode(ProtoWriteBuffer buffer) const {
+  buffer.encode_uint32(1, this->device_id);
+  buffer.encode_string(2, this->name);
+  buffer.encode_uint32(3, this->area_id);
+}
+void DeviceInfo::calculate_size(uint32_t &total_size) const {
+  ProtoSize::add_uint32_field(total_size, 1, this->device_id, false);
+  ProtoSize::add_string_field(total_size, 1, this->name, false);
+  ProtoSize::add_uint32_field(total_size, 1, this->area_id, false);
+}
+#ifdef HAS_PROTO_MESSAGE_DUMP
+void DeviceInfo::dump_to(std::string &out) const {
+  __attribute__((unused)) char buffer[64];
+  out.append("DeviceInfo {\n");
+  out.append("  device_id: ");
+  sprintf(buffer, "%" PRIu32, this->device_id);
+  out.append(buffer);
+  out.append("\n");
+
+  out.append("  name: ");
+  out.append("'").append(this->name).append("'");
+  out.append("\n");
+
+  out.append("  area_id: ");
+  sprintf(buffer, "%" PRIu32, this->area_id);
+  out.append(buffer);
+  out.append("\n");
+  out.append("}");
+}
+#endif
 bool DeviceInfoResponse::decode_varint(uint32_t field_id, ProtoVarInt value) {
   switch (field_id) {
     case 1: {
@@ -896,6 +993,18 @@ bool DeviceInfoResponse::decode_length(uint32_t field_id, ProtoLengthDelimited v
       this->bluetooth_mac_address = value.as_string();
       return true;
     }
+    case 20: {
+      this->devices.push_back(value.as_message<DeviceInfo>());
+      return true;
+    }
+    case 21: {
+      this->areas.push_back(value.as_message<AreaInfo>());
+      return true;
+    }
+    case 22: {
+      this->area = value.as_message<AreaInfo>();
+      return true;
+    }
     default:
       return false;
   }
@@ -920,6 +1029,13 @@ void DeviceInfoResponse::encode(ProtoWriteBuffer buffer) const {
   buffer.encode_string(16, this->suggested_area);
   buffer.encode_string(18, this->bluetooth_mac_address);
   buffer.encode_bool(19, this->api_encryption_supported);
+  for (auto &it : this->devices) {
+    buffer.encode_message<DeviceInfo>(20, it, true);
+  }
+  for (auto &it : this->areas) {
+    buffer.encode_message<AreaInfo>(21, it, true);
+  }
+  buffer.encode_message<AreaInfo>(22, this->area);
 }
 void DeviceInfoResponse::calculate_size(uint32_t &total_size) const {
   ProtoSize::add_bool_field(total_size, 1, this->uses_password, false);
@@ -941,6 +1057,9 @@ void DeviceInfoResponse::calculate_size(uint32_t &total_size) const {
   ProtoSize::add_string_field(total_size, 2, this->suggested_area, false);
   ProtoSize::add_string_field(total_size, 2, this->bluetooth_mac_address, false);
   ProtoSize::add_bool_field(total_size, 2, this->api_encryption_supported, false);
+  ProtoSize::add_repeated_message(total_size, 2, this->devices);
+  ProtoSize::add_repeated_message(total_size, 2, this->areas);
+  ProtoSize::add_message_object(total_size, 2, this->area, false);
 }
 #ifdef HAS_PROTO_MESSAGE_DUMP
 void DeviceInfoResponse::dump_to(std::string &out) const {
@@ -1026,6 +1145,22 @@ void DeviceInfoResponse::dump_to(std::string &out) const {
   out.append("  api_encryption_supported: ");
   out.append(YESNO(this->api_encryption_supported));
   out.append("\n");
+
+  for (const auto &it : this->devices) {
+    out.append("  devices: ");
+    it.dump_to(out);
+    out.append("\n");
+  }
+
+  for (const auto &it : this->areas) {
+    out.append("  areas: ");
+    it.dump_to(out);
+    out.append("\n");
+  }
+
+  out.append("  area: ");
+  this->area.dump_to(out);
+  out.append("\n");
   out.append("}");
 }
 #endif
@@ -1052,6 +1187,10 @@ bool ListEntitiesBinarySensorResponse::decode_varint(uint32_t field_id, ProtoVar
       this->entity_category = value.as_enum<enums::EntityCategory>();
       return true;
     }
+    case 10: {
+      this->device_id = value.as_uint32();
+      return true;
+    }
     default:
       return false;
   }
@@ -1102,6 +1241,7 @@ void ListEntitiesBinarySensorResponse::encode(ProtoWriteBuffer buffer) const {
   buffer.encode_bool(7, this->disabled_by_default);
   buffer.encode_string(8, this->icon);
   buffer.encode_enum<enums::EntityCategory>(9, this->entity_category);
+  buffer.encode_uint32(10, this->device_id);
 }
 void ListEntitiesBinarySensorResponse::calculate_size(uint32_t &total_size) const {
   ProtoSize::add_string_field(total_size, 1, this->object_id, false);
@@ -1113,6 +1253,7 @@ void ListEntitiesBinarySensorResponse::calculate_size(uint32_t &total_size) cons
   ProtoSize::add_bool_field(total_size, 1, this->disabled_by_default, false);
   ProtoSize::add_string_field(total_size, 1, this->icon, false);
   ProtoSize::add_enum_field(total_size, 1, static_cast<uint32_t>(this->entity_category), false);
+  ProtoSize::add_uint32_field(total_size, 1, this->device_id, false);
 }
 #ifdef HAS_PROTO_MESSAGE_DUMP
 void ListEntitiesBinarySensorResponse::dump_to(std::string &out) const {
@@ -1154,6 +1295,11 @@ void ListEntitiesBinarySensorResponse::dump_to(std::string &out) const {
   out.append("  entity_category: ");
   out.append(proto_enum_to_string<enums::EntityCategory>(this->entity_category));
   out.append("\n");
+
+  out.append("  device_id: ");
+  sprintf(buffer, "%" PRIu32, this->device_id);
+  out.append(buffer);
+  out.append("\n");
   out.append("}");
 }
 #endif
@@ -1236,6 +1382,10 @@ bool ListEntitiesCoverResponse::decode_varint(uint32_t field_id, ProtoVarInt val
       this->supports_stop = value.as_bool();
       return true;
     }
+    case 13: {
+      this->device_id = value.as_uint32();
+      return true;
+    }
     default:
       return false;
   }
@@ -1289,6 +1439,7 @@ void ListEntitiesCoverResponse::encode(ProtoWriteBuffer buffer) const {
   buffer.encode_string(10, this->icon);
   buffer.encode_enum<enums::EntityCategory>(11, this->entity_category);
   buffer.encode_bool(12, this->supports_stop);
+  buffer.encode_uint32(13, this->device_id);
 }
 void ListEntitiesCoverResponse::calculate_size(uint32_t &total_size) const {
   ProtoSize::add_string_field(total_size, 1, this->object_id, false);
@@ -1303,6 +1454,7 @@ void ListEntitiesCoverResponse::calculate_size(uint32_t &total_size) const {
   ProtoSize::add_string_field(total_size, 1, this->icon, false);
   ProtoSize::add_enum_field(total_size, 1, static_cast<uint32_t>(this->entity_category), false);
   ProtoSize::add_bool_field(total_size, 1, this->supports_stop, false);
+  ProtoSize::add_uint32_field(total_size, 1, this->device_id, false);
 }
 #ifdef HAS_PROTO_MESSAGE_DUMP
 void ListEntitiesCoverResponse::dump_to(std::string &out) const {
@@ -1356,6 +1508,11 @@ void ListEntitiesCoverResponse::dump_to(std::string &out) const {
   out.append("  supports_stop: ");
   out.append(YESNO(this->supports_stop));
   out.append("\n");
+
+  out.append("  device_id: ");
+  sprintf(buffer, "%" PRIu32, this->device_id);
+  out.append(buffer);
+  out.append("\n");
   out.append("}");
 }
 #endif
@@ -1565,6 +1722,10 @@ bool ListEntitiesFanResponse::decode_varint(uint32_t field_id, ProtoVarInt value
       this->entity_category = value.as_enum<enums::EntityCategory>();
       return true;
     }
+    case 13: {
+      this->device_id = value.as_uint32();
+      return true;
+    }
     default:
       return false;
   }
@@ -1620,6 +1781,7 @@ void ListEntitiesFanResponse::encode(ProtoWriteBuffer buffer) const {
   for (auto &it : this->supported_preset_modes) {
     buffer.encode_string(12, it, true);
   }
+  buffer.encode_uint32(13, this->device_id);
 }
 void ListEntitiesFanResponse::calculate_size(uint32_t &total_size) const {
   ProtoSize::add_string_field(total_size, 1, this->object_id, false);
@@ -1638,6 +1800,7 @@ void ListEntitiesFanResponse::calculate_size(uint32_t &total_size) const {
       ProtoSize::add_string_field(total_size, 1, it, true);
     }
   }
+  ProtoSize::add_uint32_field(total_size, 1, this->device_id, false);
 }
 #ifdef HAS_PROTO_MESSAGE_DUMP
 void ListEntitiesFanResponse::dump_to(std::string &out) const {
@@ -1694,6 +1857,11 @@ void ListEntitiesFanResponse::dump_to(std::string &out) const {
     out.append("'").append(it).append("'");
     out.append("\n");
   }
+
+  out.append("  device_id: ");
+  sprintf(buffer, "%" PRIu32, this->device_id);
+  out.append(buffer);
+  out.append("\n");
   out.append("}");
 }
 #endif
@@ -1987,6 +2155,10 @@ bool ListEntitiesLightResponse::decode_varint(uint32_t field_id, ProtoVarInt val
       this->entity_category = value.as_enum<enums::EntityCategory>();
       return true;
     }
+    case 16: {
+      this->device_id = value.as_uint32();
+      return true;
+    }
     default:
       return false;
   }
@@ -2055,6 +2227,7 @@ void ListEntitiesLightResponse::encode(ProtoWriteBuffer buffer) const {
   buffer.encode_bool(13, this->disabled_by_default);
   buffer.encode_string(14, this->icon);
   buffer.encode_enum<enums::EntityCategory>(15, this->entity_category);
+  buffer.encode_uint32(16, this->device_id);
 }
 void ListEntitiesLightResponse::calculate_size(uint32_t &total_size) const {
   ProtoSize::add_string_field(total_size, 1, this->object_id, false);
@@ -2080,6 +2253,7 @@ void ListEntitiesLightResponse::calculate_size(uint32_t &total_size) const {
   ProtoSize::add_bool_field(total_size, 1, this->disabled_by_default, false);
   ProtoSize::add_string_field(total_size, 1, this->icon, false);
   ProtoSize::add_enum_field(total_size, 1, static_cast<uint32_t>(this->entity_category), false);
+  ProtoSize::add_uint32_field(total_size, 2, this->device_id, false);
 }
 #ifdef HAS_PROTO_MESSAGE_DUMP
 void ListEntitiesLightResponse::dump_to(std::string &out) const {
@@ -2151,6 +2325,11 @@ void ListEntitiesLightResponse::dump_to(std::string &out) const {
   out.append("  entity_category: ");
   out.append(proto_enum_to_string<enums::EntityCategory>(this->entity_category));
   out.append("\n");
+
+  out.append("  device_id: ");
+  sprintf(buffer, "%" PRIu32, this->device_id);
+  out.append(buffer);
+  out.append("\n");
   out.append("}");
 }
 #endif
@@ -2658,6 +2837,10 @@ bool ListEntitiesSensorResponse::decode_varint(uint32_t field_id, ProtoVarInt va
       this->entity_category = value.as_enum<enums::EntityCategory>();
       return true;
     }
+    case 14: {
+      this->device_id = value.as_uint32();
+      return true;
+    }
     default:
       return false;
   }
@@ -2716,6 +2899,7 @@ void ListEntitiesSensorResponse::encode(ProtoWriteBuffer buffer) const {
   buffer.encode_enum<enums::SensorLastResetType>(11, this->legacy_last_reset_type);
   buffer.encode_bool(12, this->disabled_by_default);
   buffer.encode_enum<enums::EntityCategory>(13, this->entity_category);
+  buffer.encode_uint32(14, this->device_id);
 }
 void ListEntitiesSensorResponse::calculate_size(uint32_t &total_size) const {
   ProtoSize::add_string_field(total_size, 1, this->object_id, false);
@@ -2731,6 +2915,7 @@ void ListEntitiesSensorResponse::calculate_size(uint32_t &total_size) const {
   ProtoSize::add_enum_field(total_size, 1, static_cast<uint32_t>(this->legacy_last_reset_type), false);
   ProtoSize::add_bool_field(total_size, 1, this->disabled_by_default, false);
   ProtoSize::add_enum_field(total_size, 1, static_cast<uint32_t>(this->entity_category), false);
+  ProtoSize::add_uint32_field(total_size, 1, this->device_id, false);
 }
 #ifdef HAS_PROTO_MESSAGE_DUMP
 void ListEntitiesSensorResponse::dump_to(std::string &out) const {
@@ -2789,6 +2974,11 @@ void ListEntitiesSensorResponse::dump_to(std::string &out) const {
   out.append("  entity_category: ");
   out.append(proto_enum_to_string<enums::EntityCategory>(this->entity_category));
   out.append("\n");
+
+  out.append("  device_id: ");
+  sprintf(buffer, "%" PRIu32, this->device_id);
+  out.append(buffer);
+  out.append("\n");
   out.append("}");
 }
 #endif
@@ -2860,6 +3050,10 @@ bool ListEntitiesSwitchResponse::decode_varint(uint32_t field_id, ProtoVarInt va
       this->entity_category = value.as_enum<enums::EntityCategory>();
       return true;
     }
+    case 10: {
+      this->device_id = value.as_uint32();
+      return true;
+    }
     default:
       return false;
   }
@@ -2910,6 +3104,7 @@ void ListEntitiesSwitchResponse::encode(ProtoWriteBuffer buffer) const {
   buffer.encode_bool(7, this->disabled_by_default);
   buffer.encode_enum<enums::EntityCategory>(8, this->entity_category);
   buffer.encode_string(9, this->device_class);
+  buffer.encode_uint32(10, this->device_id);
 }
 void ListEntitiesSwitchResponse::calculate_size(uint32_t &total_size) const {
   ProtoSize::add_string_field(total_size, 1, this->object_id, false);
@@ -2921,6 +3116,7 @@ void ListEntitiesSwitchResponse::calculate_size(uint32_t &total_size) const {
   ProtoSize::add_bool_field(total_size, 1, this->disabled_by_default, false);
   ProtoSize::add_enum_field(total_size, 1, static_cast<uint32_t>(this->entity_category), false);
   ProtoSize::add_string_field(total_size, 1, this->device_class, false);
+  ProtoSize::add_uint32_field(total_size, 1, this->device_id, false);
 }
 #ifdef HAS_PROTO_MESSAGE_DUMP
 void ListEntitiesSwitchResponse::dump_to(std::string &out) const {
@@ -2962,6 +3158,11 @@ void ListEntitiesSwitchResponse::dump_to(std::string &out) const {
   out.append("  device_class: ");
   out.append("'").append(this->device_class).append("'");
   out.append("\n");
+
+  out.append("  device_id: ");
+  sprintf(buffer, "%" PRIu32, this->device_id);
+  out.append(buffer);
+  out.append("\n");
   out.append("}");
 }
 #endif
@@ -3061,6 +3262,10 @@ bool ListEntitiesTextSensorResponse::decode_varint(uint32_t field_id, ProtoVarIn
       this->entity_category = value.as_enum<enums::EntityCategory>();
       return true;
     }
+    case 9: {
+      this->device_id = value.as_uint32();
+      return true;
+    }
     default:
       return false;
   }
@@ -3110,6 +3315,7 @@ void ListEntitiesTextSensorResponse::encode(ProtoWriteBuffer buffer) const {
   buffer.encode_bool(6, this->disabled_by_default);
   buffer.encode_enum<enums::EntityCategory>(7, this->entity_category);
   buffer.encode_string(8, this->device_class);
+  buffer.encode_uint32(9, this->device_id);
 }
 void ListEntitiesTextSensorResponse::calculate_size(uint32_t &total_size) const {
   ProtoSize::add_string_field(total_size, 1, this->object_id, false);
@@ -3120,6 +3326,7 @@ void ListEntitiesTextSensorResponse::calculate_size(uint32_t &total_size) const
   ProtoSize::add_bool_field(total_size, 1, this->disabled_by_default, false);
   ProtoSize::add_enum_field(total_size, 1, static_cast<uint32_t>(this->entity_category), false);
   ProtoSize::add_string_field(total_size, 1, this->device_class, false);
+  ProtoSize::add_uint32_field(total_size, 1, this->device_id, false);
 }
 #ifdef HAS_PROTO_MESSAGE_DUMP
 void ListEntitiesTextSensorResponse::dump_to(std::string &out) const {
@@ -3157,6 +3364,11 @@ void ListEntitiesTextSensorResponse::dump_to(std::string &out) const {
   out.append("  device_class: ");
   out.append("'").append(this->device_class).append("'");
   out.append("\n");
+
+  out.append("  device_id: ");
+  sprintf(buffer, "%" PRIu32, this->device_id);
+  out.append(buffer);
+  out.append("\n");
   out.append("}");
 }
 #endif
@@ -3922,6 +4134,10 @@ bool ListEntitiesCameraResponse::decode_varint(uint32_t field_id, ProtoVarInt va
       this->entity_category = value.as_enum<enums::EntityCategory>();
       return true;
     }
+    case 8: {
+      this->device_id = value.as_uint32();
+      return true;
+    }
     default:
       return false;
   }
@@ -3966,6 +4182,7 @@ void ListEntitiesCameraResponse::encode(ProtoWriteBuffer buffer) const {
   buffer.encode_bool(5, this->disabled_by_default);
   buffer.encode_string(6, this->icon);
   buffer.encode_enum<enums::EntityCategory>(7, this->entity_category);
+  buffer.encode_uint32(8, this->device_id);
 }
 void ListEntitiesCameraResponse::calculate_size(uint32_t &total_size) const {
   ProtoSize::add_string_field(total_size, 1, this->object_id, false);
@@ -3975,6 +4192,7 @@ void ListEntitiesCameraResponse::calculate_size(uint32_t &total_size) const {
   ProtoSize::add_bool_field(total_size, 1, this->disabled_by_default, false);
   ProtoSize::add_string_field(total_size, 1, this->icon, false);
   ProtoSize::add_enum_field(total_size, 1, static_cast<uint32_t>(this->entity_category), false);
+  ProtoSize::add_uint32_field(total_size, 1, this->device_id, false);
 }
 #ifdef HAS_PROTO_MESSAGE_DUMP
 void ListEntitiesCameraResponse::dump_to(std::string &out) const {
@@ -4008,6 +4226,11 @@ void ListEntitiesCameraResponse::dump_to(std::string &out) const {
   out.append("  entity_category: ");
   out.append(proto_enum_to_string<enums::EntityCategory>(this->entity_category));
   out.append("\n");
+
+  out.append("  device_id: ");
+  sprintf(buffer, "%" PRIu32, this->device_id);
+  out.append(buffer);
+  out.append("\n");
   out.append("}");
 }
 #endif
@@ -4156,6 +4379,10 @@ bool ListEntitiesClimateResponse::decode_varint(uint32_t field_id, ProtoVarInt v
       this->supports_target_humidity = value.as_bool();
       return true;
     }
+    case 26: {
+      this->device_id = value.as_uint32();
+      return true;
+    }
     default:
       return false;
   }
@@ -4262,6 +4489,7 @@ void ListEntitiesClimateResponse::encode(ProtoWriteBuffer buffer) const {
   buffer.encode_bool(23, this->supports_target_humidity);
   buffer.encode_float(24, this->visual_min_humidity);
   buffer.encode_float(25, this->visual_max_humidity);
+  buffer.encode_uint32(26, this->device_id);
 }
 void ListEntitiesClimateResponse::calculate_size(uint32_t &total_size) const {
   ProtoSize::add_string_field(total_size, 1, this->object_id, false);
@@ -4313,6 +4541,7 @@ void ListEntitiesClimateResponse::calculate_size(uint32_t &total_size) const {
   ProtoSize::add_bool_field(total_size, 2, this->supports_target_humidity, false);
   ProtoSize::add_fixed_field<4>(total_size, 2, this->visual_min_humidity != 0.0f, false);
   ProtoSize::add_fixed_field<4>(total_size, 2, this->visual_max_humidity != 0.0f, false);
+  ProtoSize::add_uint32_field(total_size, 2, this->device_id, false);
 }
 #ifdef HAS_PROTO_MESSAGE_DUMP
 void ListEntitiesClimateResponse::dump_to(std::string &out) const {
@@ -4436,6 +4665,11 @@ void ListEntitiesClimateResponse::dump_to(std::string &out) const {
   sprintf(buffer, "%g", this->visual_max_humidity);
   out.append(buffer);
   out.append("\n");
+
+  out.append("  device_id: ");
+  sprintf(buffer, "%" PRIu32, this->device_id);
+  out.append(buffer);
+  out.append("\n");
   out.append("}");
 }
 #endif
@@ -4901,6 +5135,10 @@ bool ListEntitiesNumberResponse::decode_varint(uint32_t field_id, ProtoVarInt va
       this->mode = value.as_enum<enums::NumberMode>();
       return true;
     }
+    case 14: {
+      this->device_id = value.as_uint32();
+      return true;
+    }
     default:
       return false;
   }
@@ -4971,6 +5209,7 @@ void ListEntitiesNumberResponse::encode(ProtoWriteBuffer buffer) const {
   buffer.encode_string(11, this->unit_of_measurement);
   buffer.encode_enum<enums::NumberMode>(12, this->mode);
   buffer.encode_string(13, this->device_class);
+  buffer.encode_uint32(14, this->device_id);
 }
 void ListEntitiesNumberResponse::calculate_size(uint32_t &total_size) const {
   ProtoSize::add_string_field(total_size, 1, this->object_id, false);
@@ -4986,6 +5225,7 @@ void ListEntitiesNumberResponse::calculate_size(uint32_t &total_size) const {
   ProtoSize::add_string_field(total_size, 1, this->unit_of_measurement, false);
   ProtoSize::add_enum_field(total_size, 1, static_cast<uint32_t>(this->mode), false);
   ProtoSize::add_string_field(total_size, 1, this->device_class, false);
+  ProtoSize::add_uint32_field(total_size, 1, this->device_id, false);
 }
 #ifdef HAS_PROTO_MESSAGE_DUMP
 void ListEntitiesNumberResponse::dump_to(std::string &out) const {
@@ -5046,6 +5286,11 @@ void ListEntitiesNumberResponse::dump_to(std::string &out) const {
   out.append("  device_class: ");
   out.append("'").append(this->device_class).append("'");
   out.append("\n");
+
+  out.append("  device_id: ");
+  sprintf(buffer, "%" PRIu32, this->device_id);
+  out.append(buffer);
+  out.append("\n");
   out.append("}");
 }
 #endif
@@ -5151,6 +5396,10 @@ bool ListEntitiesSelectResponse::decode_varint(uint32_t field_id, ProtoVarInt va
       this->entity_category = value.as_enum<enums::EntityCategory>();
       return true;
     }
+    case 9: {
+      this->device_id = value.as_uint32();
+      return true;
+    }
     default:
       return false;
   }
@@ -5202,6 +5451,7 @@ void ListEntitiesSelectResponse::encode(ProtoWriteBuffer buffer) const {
   }
   buffer.encode_bool(7, this->disabled_by_default);
   buffer.encode_enum<enums::EntityCategory>(8, this->entity_category);
+  buffer.encode_uint32(9, this->device_id);
 }
 void ListEntitiesSelectResponse::calculate_size(uint32_t &total_size) const {
   ProtoSize::add_string_field(total_size, 1, this->object_id, false);
@@ -5216,6 +5466,7 @@ void ListEntitiesSelectResponse::calculate_size(uint32_t &total_size) const {
   }
   ProtoSize::add_bool_field(total_size, 1, this->disabled_by_default, false);
   ProtoSize::add_enum_field(total_size, 1, static_cast<uint32_t>(this->entity_category), false);
+  ProtoSize::add_uint32_field(total_size, 1, this->device_id, false);
 }
 #ifdef HAS_PROTO_MESSAGE_DUMP
 void ListEntitiesSelectResponse::dump_to(std::string &out) const {
@@ -5255,6 +5506,11 @@ void ListEntitiesSelectResponse::dump_to(std::string &out) const {
   out.append("  entity_category: ");
   out.append(proto_enum_to_string<enums::EntityCategory>(this->entity_category));
   out.append("\n");
+
+  out.append("  device_id: ");
+  sprintf(buffer, "%" PRIu32, this->device_id);
+  out.append(buffer);
+  out.append("\n");
   out.append("}");
 }
 #endif
@@ -5378,6 +5634,10 @@ bool ListEntitiesSirenResponse::decode_varint(uint32_t field_id, ProtoVarInt val
       this->entity_category = value.as_enum<enums::EntityCategory>();
       return true;
     }
+    case 11: {
+      this->device_id = value.as_uint32();
+      return true;
+    }
     default:
       return false;
   }
@@ -5431,6 +5691,7 @@ void ListEntitiesSirenResponse::encode(ProtoWriteBuffer buffer) const {
   buffer.encode_bool(8, this->supports_duration);
   buffer.encode_bool(9, this->supports_volume);
   buffer.encode_enum<enums::EntityCategory>(10, this->entity_category);
+  buffer.encode_uint32(11, this->device_id);
 }
 void ListEntitiesSirenResponse::calculate_size(uint32_t &total_size) const {
   ProtoSize::add_string_field(total_size, 1, this->object_id, false);
@@ -5447,6 +5708,7 @@ void ListEntitiesSirenResponse::calculate_size(uint32_t &total_size) const {
   ProtoSize::add_bool_field(total_size, 1, this->supports_duration, false);
   ProtoSize::add_bool_field(total_size, 1, this->supports_volume, false);
   ProtoSize::add_enum_field(total_size, 1, static_cast<uint32_t>(this->entity_category), false);
+  ProtoSize::add_uint32_field(total_size, 1, this->device_id, false);
 }
 #ifdef HAS_PROTO_MESSAGE_DUMP
 void ListEntitiesSirenResponse::dump_to(std::string &out) const {
@@ -5494,6 +5756,11 @@ void ListEntitiesSirenResponse::dump_to(std::string &out) const {
   out.append("  entity_category: ");
   out.append(proto_enum_to_string<enums::EntityCategory>(this->entity_category));
   out.append("\n");
+
+  out.append("  device_id: ");
+  sprintf(buffer, "%" PRIu32, this->device_id);
+  out.append(buffer);
+  out.append("\n");
   out.append("}");
 }
 #endif
@@ -5683,6 +5950,10 @@ bool ListEntitiesLockResponse::decode_varint(uint32_t field_id, ProtoVarInt valu
       this->requires_code = value.as_bool();
       return true;
     }
+    case 12: {
+      this->device_id = value.as_uint32();
+      return true;
+    }
     default:
       return false;
   }
@@ -5735,6 +6006,7 @@ void ListEntitiesLockResponse::encode(ProtoWriteBuffer buffer) const {
   buffer.encode_bool(9, this->supports_open);
   buffer.encode_bool(10, this->requires_code);
   buffer.encode_string(11, this->code_format);
+  buffer.encode_uint32(12, this->device_id);
 }
 void ListEntitiesLockResponse::calculate_size(uint32_t &total_size) const {
   ProtoSize::add_string_field(total_size, 1, this->object_id, false);
@@ -5748,6 +6020,7 @@ void ListEntitiesLockResponse::calculate_size(uint32_t &total_size) const {
   ProtoSize::add_bool_field(total_size, 1, this->supports_open, false);
   ProtoSize::add_bool_field(total_size, 1, this->requires_code, false);
   ProtoSize::add_string_field(total_size, 1, this->code_format, false);
+  ProtoSize::add_uint32_field(total_size, 1, this->device_id, false);
 }
 #ifdef HAS_PROTO_MESSAGE_DUMP
 void ListEntitiesLockResponse::dump_to(std::string &out) const {
@@ -5797,6 +6070,11 @@ void ListEntitiesLockResponse::dump_to(std::string &out) const {
   out.append("  code_format: ");
   out.append("'").append(this->code_format).append("'");
   out.append("\n");
+
+  out.append("  device_id: ");
+  sprintf(buffer, "%" PRIu32, this->device_id);
+  out.append(buffer);
+  out.append("\n");
   out.append("}");
 }
 #endif
@@ -5922,6 +6200,10 @@ bool ListEntitiesButtonResponse::decode_varint(uint32_t field_id, ProtoVarInt va
       this->entity_category = value.as_enum<enums::EntityCategory>();
       return true;
     }
+    case 9: {
+      this->device_id = value.as_uint32();
+      return true;
+    }
     default:
       return false;
   }
@@ -5971,6 +6253,7 @@ void ListEntitiesButtonResponse::encode(ProtoWriteBuffer buffer) const {
   buffer.encode_bool(6, this->disabled_by_default);
   buffer.encode_enum<enums::EntityCategory>(7, this->entity_category);
   buffer.encode_string(8, this->device_class);
+  buffer.encode_uint32(9, this->device_id);
 }
 void ListEntitiesButtonResponse::calculate_size(uint32_t &total_size) const {
   ProtoSize::add_string_field(total_size, 1, this->object_id, false);
@@ -5981,6 +6264,7 @@ void ListEntitiesButtonResponse::calculate_size(uint32_t &total_size) const {
   ProtoSize::add_bool_field(total_size, 1, this->disabled_by_default, false);
   ProtoSize::add_enum_field(total_size, 1, static_cast<uint32_t>(this->entity_category), false);
   ProtoSize::add_string_field(total_size, 1, this->device_class, false);
+  ProtoSize::add_uint32_field(total_size, 1, this->device_id, false);
 }
 #ifdef HAS_PROTO_MESSAGE_DUMP
 void ListEntitiesButtonResponse::dump_to(std::string &out) const {
@@ -6018,6 +6302,11 @@ void ListEntitiesButtonResponse::dump_to(std::string &out) const {
   out.append("  device_class: ");
   out.append("'").append(this->device_class).append("'");
   out.append("\n");
+
+  out.append("  device_id: ");
+  sprintf(buffer, "%" PRIu32, this->device_id);
+  out.append(buffer);
+  out.append("\n");
   out.append("}");
 }
 #endif
@@ -6135,6 +6424,10 @@ bool ListEntitiesMediaPlayerResponse::decode_varint(uint32_t field_id, ProtoVarI
       this->supports_pause = value.as_bool();
       return true;
     }
+    case 10: {
+      this->device_id = value.as_uint32();
+      return true;
+    }
     default:
       return false;
   }
@@ -6187,6 +6480,7 @@ void ListEntitiesMediaPlayerResponse::encode(ProtoWriteBuffer buffer) const {
   for (auto &it : this->supported_formats) {
     buffer.encode_message<MediaPlayerSupportedFormat>(9, it, true);
   }
+  buffer.encode_uint32(10, this->device_id);
 }
 void ListEntitiesMediaPlayerResponse::calculate_size(uint32_t &total_size) const {
   ProtoSize::add_string_field(total_size, 1, this->object_id, false);
@@ -6198,6 +6492,7 @@ void ListEntitiesMediaPlayerResponse::calculate_size(uint32_t &total_size) const
   ProtoSize::add_enum_field(total_size, 1, static_cast<uint32_t>(this->entity_category), false);
   ProtoSize::add_bool_field(total_size, 1, this->supports_pause, false);
   ProtoSize::add_repeated_message(total_size, 1, this->supported_formats);
+  ProtoSize::add_uint32_field(total_size, 1, this->device_id, false);
 }
 #ifdef HAS_PROTO_MESSAGE_DUMP
 void ListEntitiesMediaPlayerResponse::dump_to(std::string &out) const {
@@ -6241,6 +6536,11 @@ void ListEntitiesMediaPlayerResponse::dump_to(std::string &out) const {
     it.dump_to(out);
     out.append("\n");
   }
+
+  out.append("  device_id: ");
+  sprintf(buffer, "%" PRIu32, this->device_id);
+  out.append(buffer);
+  out.append("\n");
   out.append("}");
 }
 #endif
@@ -8551,6 +8851,10 @@ bool ListEntitiesAlarmControlPanelResponse::decode_varint(uint32_t field_id, Pro
       this->requires_code_to_arm = value.as_bool();
       return true;
     }
+    case 11: {
+      this->device_id = value.as_uint32();
+      return true;
+    }
     default:
       return false;
   }
@@ -8598,6 +8902,7 @@ void ListEntitiesAlarmControlPanelResponse::encode(ProtoWriteBuffer buffer) cons
   buffer.encode_uint32(8, this->supported_features);
   buffer.encode_bool(9, this->requires_code);
   buffer.encode_bool(10, this->requires_code_to_arm);
+  buffer.encode_uint32(11, this->device_id);
 }
 void ListEntitiesAlarmControlPanelResponse::calculate_size(uint32_t &total_size) const {
   ProtoSize::add_string_field(total_size, 1, this->object_id, false);
@@ -8610,6 +8915,7 @@ void ListEntitiesAlarmControlPanelResponse::calculate_size(uint32_t &total_size)
   ProtoSize::add_uint32_field(total_size, 1, this->supported_features, false);
   ProtoSize::add_bool_field(total_size, 1, this->requires_code, false);
   ProtoSize::add_bool_field(total_size, 1, this->requires_code_to_arm, false);
+  ProtoSize::add_uint32_field(total_size, 1, this->device_id, false);
 }
 #ifdef HAS_PROTO_MESSAGE_DUMP
 void ListEntitiesAlarmControlPanelResponse::dump_to(std::string &out) const {
@@ -8656,6 +8962,11 @@ void ListEntitiesAlarmControlPanelResponse::dump_to(std::string &out) const {
   out.append("  requires_code_to_arm: ");
   out.append(YESNO(this->requires_code_to_arm));
   out.append("\n");
+
+  out.append("  device_id: ");
+  sprintf(buffer, "%" PRIu32, this->device_id);
+  out.append(buffer);
+  out.append("\n");
   out.append("}");
 }
 #endif
@@ -8783,6 +9094,10 @@ bool ListEntitiesTextResponse::decode_varint(uint32_t field_id, ProtoVarInt valu
       this->mode = value.as_enum<enums::TextMode>();
       return true;
     }
+    case 12: {
+      this->device_id = value.as_uint32();
+      return true;
+    }
     default:
       return false;
   }
@@ -8835,6 +9150,7 @@ void ListEntitiesTextResponse::encode(ProtoWriteBuffer buffer) const {
   buffer.encode_uint32(9, this->max_length);
   buffer.encode_string(10, this->pattern);
   buffer.encode_enum<enums::TextMode>(11, this->mode);
+  buffer.encode_uint32(12, this->device_id);
 }
 void ListEntitiesTextResponse::calculate_size(uint32_t &total_size) const {
   ProtoSize::add_string_field(total_size, 1, this->object_id, false);
@@ -8848,6 +9164,7 @@ void ListEntitiesTextResponse::calculate_size(uint32_t &total_size) const {
   ProtoSize::add_uint32_field(total_size, 1, this->max_length, false);
   ProtoSize::add_string_field(total_size, 1, this->pattern, false);
   ProtoSize::add_enum_field(total_size, 1, static_cast<uint32_t>(this->mode), false);
+  ProtoSize::add_uint32_field(total_size, 1, this->device_id, false);
 }
 #ifdef HAS_PROTO_MESSAGE_DUMP
 void ListEntitiesTextResponse::dump_to(std::string &out) const {
@@ -8899,6 +9216,11 @@ void ListEntitiesTextResponse::dump_to(std::string &out) const {
   out.append("  mode: ");
   out.append(proto_enum_to_string<enums::TextMode>(this->mode));
   out.append("\n");
+
+  out.append("  device_id: ");
+  sprintf(buffer, "%" PRIu32, this->device_id);
+  out.append(buffer);
+  out.append("\n");
   out.append("}");
 }
 #endif
@@ -9014,6 +9336,10 @@ bool ListEntitiesDateResponse::decode_varint(uint32_t field_id, ProtoVarInt valu
       this->entity_category = value.as_enum<enums::EntityCategory>();
       return true;
     }
+    case 8: {
+      this->device_id = value.as_uint32();
+      return true;
+    }
     default:
       return false;
   }
@@ -9058,6 +9384,7 @@ void ListEntitiesDateResponse::encode(ProtoWriteBuffer buffer) const {
   buffer.encode_string(5, this->icon);
   buffer.encode_bool(6, this->disabled_by_default);
   buffer.encode_enum<enums::EntityCategory>(7, this->entity_category);
+  buffer.encode_uint32(8, this->device_id);
 }
 void ListEntitiesDateResponse::calculate_size(uint32_t &total_size) const {
   ProtoSize::add_string_field(total_size, 1, this->object_id, false);
@@ -9067,6 +9394,7 @@ void ListEntitiesDateResponse::calculate_size(uint32_t &total_size) const {
   ProtoSize::add_string_field(total_size, 1, this->icon, false);
   ProtoSize::add_bool_field(total_size, 1, this->disabled_by_default, false);
   ProtoSize::add_enum_field(total_size, 1, static_cast<uint32_t>(this->entity_category), false);
+  ProtoSize::add_uint32_field(total_size, 1, this->device_id, false);
 }
 #ifdef HAS_PROTO_MESSAGE_DUMP
 void ListEntitiesDateResponse::dump_to(std::string &out) const {
@@ -9100,6 +9428,11 @@ void ListEntitiesDateResponse::dump_to(std::string &out) const {
   out.append("  entity_category: ");
   out.append(proto_enum_to_string<enums::EntityCategory>(this->entity_category));
   out.append("\n");
+
+  out.append("  device_id: ");
+  sprintf(buffer, "%" PRIu32, this->device_id);
+  out.append(buffer);
+  out.append("\n");
   out.append("}");
 }
 #endif
@@ -9255,6 +9588,10 @@ bool ListEntitiesTimeResponse::decode_varint(uint32_t field_id, ProtoVarInt valu
       this->entity_category = value.as_enum<enums::EntityCategory>();
       return true;
     }
+    case 8: {
+      this->device_id = value.as_uint32();
+      return true;
+    }
     default:
       return false;
   }
@@ -9299,6 +9636,7 @@ void ListEntitiesTimeResponse::encode(ProtoWriteBuffer buffer) const {
   buffer.encode_string(5, this->icon);
   buffer.encode_bool(6, this->disabled_by_default);
   buffer.encode_enum<enums::EntityCategory>(7, this->entity_category);
+  buffer.encode_uint32(8, this->device_id);
 }
 void ListEntitiesTimeResponse::calculate_size(uint32_t &total_size) const {
   ProtoSize::add_string_field(total_size, 1, this->object_id, false);
@@ -9308,6 +9646,7 @@ void ListEntitiesTimeResponse::calculate_size(uint32_t &total_size) const {
   ProtoSize::add_string_field(total_size, 1, this->icon, false);
   ProtoSize::add_bool_field(total_size, 1, this->disabled_by_default, false);
   ProtoSize::add_enum_field(total_size, 1, static_cast<uint32_t>(this->entity_category), false);
+  ProtoSize::add_uint32_field(total_size, 1, this->device_id, false);
 }
 #ifdef HAS_PROTO_MESSAGE_DUMP
 void ListEntitiesTimeResponse::dump_to(std::string &out) const {
@@ -9341,6 +9680,11 @@ void ListEntitiesTimeResponse::dump_to(std::string &out) const {
   out.append("  entity_category: ");
   out.append(proto_enum_to_string<enums::EntityCategory>(this->entity_category));
   out.append("\n");
+
+  out.append("  device_id: ");
+  sprintf(buffer, "%" PRIu32, this->device_id);
+  out.append(buffer);
+  out.append("\n");
   out.append("}");
 }
 #endif
@@ -9496,6 +9840,10 @@ bool ListEntitiesEventResponse::decode_varint(uint32_t field_id, ProtoVarInt val
       this->entity_category = value.as_enum<enums::EntityCategory>();
       return true;
     }
+    case 10: {
+      this->device_id = value.as_uint32();
+      return true;
+    }
     default:
       return false;
   }
@@ -9552,6 +9900,7 @@ void ListEntitiesEventResponse::encode(ProtoWriteBuffer buffer) const {
   for (auto &it : this->event_types) {
     buffer.encode_string(9, it, true);
   }
+  buffer.encode_uint32(10, this->device_id);
 }
 void ListEntitiesEventResponse::calculate_size(uint32_t &total_size) const {
   ProtoSize::add_string_field(total_size, 1, this->object_id, false);
@@ -9567,6 +9916,7 @@ void ListEntitiesEventResponse::calculate_size(uint32_t &total_size) const {
       ProtoSize::add_string_field(total_size, 1, it, true);
     }
   }
+  ProtoSize::add_uint32_field(total_size, 1, this->device_id, false);
 }
 #ifdef HAS_PROTO_MESSAGE_DUMP
 void ListEntitiesEventResponse::dump_to(std::string &out) const {
@@ -9610,6 +9960,11 @@ void ListEntitiesEventResponse::dump_to(std::string &out) const {
     out.append("'").append(it).append("'");
     out.append("\n");
   }
+
+  out.append("  device_id: ");
+  sprintf(buffer, "%" PRIu32, this->device_id);
+  out.append(buffer);
+  out.append("\n");
   out.append("}");
 }
 #endif
@@ -9678,6 +10033,10 @@ bool ListEntitiesValveResponse::decode_varint(uint32_t field_id, ProtoVarInt val
       this->supports_stop = value.as_bool();
       return true;
     }
+    case 12: {
+      this->device_id = value.as_uint32();
+      return true;
+    }
     default:
       return false;
   }
@@ -9730,6 +10089,7 @@ void ListEntitiesValveResponse::encode(ProtoWriteBuffer buffer) const {
   buffer.encode_bool(9, this->assumed_state);
   buffer.encode_bool(10, this->supports_position);
   buffer.encode_bool(11, this->supports_stop);
+  buffer.encode_uint32(12, this->device_id);
 }
 void ListEntitiesValveResponse::calculate_size(uint32_t &total_size) const {
   ProtoSize::add_string_field(total_size, 1, this->object_id, false);
@@ -9743,6 +10103,7 @@ void ListEntitiesValveResponse::calculate_size(uint32_t &total_size) const {
   ProtoSize::add_bool_field(total_size, 1, this->assumed_state, false);
   ProtoSize::add_bool_field(total_size, 1, this->supports_position, false);
   ProtoSize::add_bool_field(total_size, 1, this->supports_stop, false);
+  ProtoSize::add_uint32_field(total_size, 1, this->device_id, false);
 }
 #ifdef HAS_PROTO_MESSAGE_DUMP
 void ListEntitiesValveResponse::dump_to(std::string &out) const {
@@ -9792,6 +10153,11 @@ void ListEntitiesValveResponse::dump_to(std::string &out) const {
   out.append("  supports_stop: ");
   out.append(YESNO(this->supports_stop));
   out.append("\n");
+
+  out.append("  device_id: ");
+  sprintf(buffer, "%" PRIu32, this->device_id);
+  out.append(buffer);
+  out.append("\n");
   out.append("}");
 }
 #endif
@@ -9923,6 +10289,10 @@ bool ListEntitiesDateTimeResponse::decode_varint(uint32_t field_id, ProtoVarInt
       this->entity_category = value.as_enum<enums::EntityCategory>();
       return true;
     }
+    case 8: {
+      this->device_id = value.as_uint32();
+      return true;
+    }
     default:
       return false;
   }
@@ -9967,6 +10337,7 @@ void ListEntitiesDateTimeResponse::encode(ProtoWriteBuffer buffer) const {
   buffer.encode_string(5, this->icon);
   buffer.encode_bool(6, this->disabled_by_default);
   buffer.encode_enum<enums::EntityCategory>(7, this->entity_category);
+  buffer.encode_uint32(8, this->device_id);
 }
 void ListEntitiesDateTimeResponse::calculate_size(uint32_t &total_size) const {
   ProtoSize::add_string_field(total_size, 1, this->object_id, false);
@@ -9976,6 +10347,7 @@ void ListEntitiesDateTimeResponse::calculate_size(uint32_t &total_size) const {
   ProtoSize::add_string_field(total_size, 1, this->icon, false);
   ProtoSize::add_bool_field(total_size, 1, this->disabled_by_default, false);
   ProtoSize::add_enum_field(total_size, 1, static_cast<uint32_t>(this->entity_category), false);
+  ProtoSize::add_uint32_field(total_size, 1, this->device_id, false);
 }
 #ifdef HAS_PROTO_MESSAGE_DUMP
 void ListEntitiesDateTimeResponse::dump_to(std::string &out) const {
@@ -10009,6 +10381,11 @@ void ListEntitiesDateTimeResponse::dump_to(std::string &out) const {
   out.append("  entity_category: ");
   out.append(proto_enum_to_string<enums::EntityCategory>(this->entity_category));
   out.append("\n");
+
+  out.append("  device_id: ");
+  sprintf(buffer, "%" PRIu32, this->device_id);
+  out.append(buffer);
+  out.append("\n");
   out.append("}");
 }
 #endif
@@ -10114,6 +10491,10 @@ bool ListEntitiesUpdateResponse::decode_varint(uint32_t field_id, ProtoVarInt va
       this->entity_category = value.as_enum<enums::EntityCategory>();
       return true;
     }
+    case 9: {
+      this->device_id = value.as_uint32();
+      return true;
+    }
     default:
       return false;
   }
@@ -10163,6 +10544,7 @@ void ListEntitiesUpdateResponse::encode(ProtoWriteBuffer buffer) const {
   buffer.encode_bool(6, this->disabled_by_default);
   buffer.encode_enum<enums::EntityCategory>(7, this->entity_category);
   buffer.encode_string(8, this->device_class);
+  buffer.encode_uint32(9, this->device_id);
 }
 void ListEntitiesUpdateResponse::calculate_size(uint32_t &total_size) const {
   ProtoSize::add_string_field(total_size, 1, this->object_id, false);
@@ -10173,6 +10555,7 @@ void ListEntitiesUpdateResponse::calculate_size(uint32_t &total_size) const {
   ProtoSize::add_bool_field(total_size, 1, this->disabled_by_default, false);
   ProtoSize::add_enum_field(total_size, 1, static_cast<uint32_t>(this->entity_category), false);
   ProtoSize::add_string_field(total_size, 1, this->device_class, false);
+  ProtoSize::add_uint32_field(total_size, 1, this->device_id, false);
 }
 #ifdef HAS_PROTO_MESSAGE_DUMP
 void ListEntitiesUpdateResponse::dump_to(std::string &out) const {
@@ -10210,6 +10593,11 @@ void ListEntitiesUpdateResponse::dump_to(std::string &out) const {
   out.append("  device_class: ");
   out.append("'").append(this->device_class).append("'");
   out.append("\n");
+
+  out.append("  device_id: ");
+  sprintf(buffer, "%" PRIu32, this->device_id);
+  out.append(buffer);
+  out.append("\n");
   out.append("}");
 }
 #endif

esphome/components/api/api_pb2.h

@@ -264,6 +264,7 @@ class InfoResponseProtoMessage : public ProtoMessage {
   bool disabled_by_default{false};
   std::string icon{};
   enums::EntityCategory entity_category{};
+  uint32_t device_id{0};
 
  protected:
 };
@@ -415,10 +416,39 @@ class DeviceInfoRequest : public ProtoMessage {
 
  protected:
 };
+class AreaInfo : public ProtoMessage {
+ public:
+  uint32_t area_id{0};
+  std::string name{};
+  void encode(ProtoWriteBuffer buffer) const override;
+  void calculate_size(uint32_t &total_size) const override;
+#ifdef HAS_PROTO_MESSAGE_DUMP
+  void dump_to(std::string &out) const override;
+#endif
+
+ protected:
+  bool decode_length(uint32_t field_id, ProtoLengthDelimited value) override;
+  bool decode_varint(uint32_t field_id, ProtoVarInt value) override;
+};
+class DeviceInfo : public ProtoMessage {
+ public:
+  uint32_t device_id{0};
+  std::string name{};
+  uint32_t area_id{0};
+  void encode(ProtoWriteBuffer buffer) const override;
+  void calculate_size(uint32_t &total_size) const override;
+#ifdef HAS_PROTO_MESSAGE_DUMP
+  void dump_to(std::string &out) const override;
+#endif
+
+ protected:
+  bool decode_length(uint32_t field_id, ProtoLengthDelimited value) override;
+  bool decode_varint(uint32_t field_id, ProtoVarInt value) override;
+};
 class DeviceInfoResponse : public ProtoMessage {
  public:
   static constexpr uint16_t MESSAGE_TYPE = 10;
-  static constexpr uint16_t ESTIMATED_SIZE = 129;
+  static constexpr uint16_t ESTIMATED_SIZE = 219;
 #ifdef HAS_PROTO_MESSAGE_DUMP
   static constexpr const char *message_name() { return "device_info_response"; }
 #endif
@@ -441,6 +471,9 @@ class DeviceInfoResponse : public ProtoMessage {
   std::string suggested_area{};
   std::string bluetooth_mac_address{};
   bool api_encryption_supported{false};
+  std::vector<DeviceInfo> devices{};
+  std::vector<AreaInfo> areas{};
+  AreaInfo area{};
   void encode(ProtoWriteBuffer buffer) const override;
   void calculate_size(uint32_t &total_size) const override;
 #ifdef HAS_PROTO_MESSAGE_DUMP
@@ -493,7 +526,7 @@ class SubscribeStatesRequest : public ProtoMessage {
 class ListEntitiesBinarySensorResponse : public InfoResponseProtoMessage {
  public:
   static constexpr uint16_t MESSAGE_TYPE = 12;
-  static constexpr uint16_t ESTIMATED_SIZE = 56;
+  static constexpr uint16_t ESTIMATED_SIZE = 60;
 #ifdef HAS_PROTO_MESSAGE_DUMP
   static constexpr const char *message_name() { return "list_entities_binary_sensor_response"; }
 #endif
@@ -532,7 +565,7 @@ class BinarySensorStateResponse : public StateResponseProtoMessage {
 class ListEntitiesCoverResponse : public InfoResponseProtoMessage {
  public:
   static constexpr uint16_t MESSAGE_TYPE = 13;
-  static constexpr uint16_t ESTIMATED_SIZE = 62;
+  static constexpr uint16_t ESTIMATED_SIZE = 66;
 #ifdef HAS_PROTO_MESSAGE_DUMP
   static constexpr const char *message_name() { return "list_entities_cover_response"; }
 #endif
@@ -601,7 +634,7 @@ class CoverCommandRequest : public ProtoMessage {
 class ListEntitiesFanResponse : public InfoResponseProtoMessage {
  public:
   static constexpr uint16_t MESSAGE_TYPE = 14;
-  static constexpr uint16_t ESTIMATED_SIZE = 73;
+  static constexpr uint16_t ESTIMATED_SIZE = 77;
 #ifdef HAS_PROTO_MESSAGE_DUMP
   static constexpr const char *message_name() { return "list_entities_fan_response"; }
 #endif
@@ -679,7 +712,7 @@ class FanCommandRequest : public ProtoMessage {
 class ListEntitiesLightResponse : public InfoResponseProtoMessage {
  public:
   static constexpr uint16_t MESSAGE_TYPE = 15;
-  static constexpr uint16_t ESTIMATED_SIZE = 85;
+  static constexpr uint16_t ESTIMATED_SIZE = 90;
 #ifdef HAS_PROTO_MESSAGE_DUMP
   static constexpr const char *message_name() { return "list_entities_light_response"; }
 #endif
@@ -780,7 +813,7 @@ class LightCommandRequest : public ProtoMessage {
 class ListEntitiesSensorResponse : public InfoResponseProtoMessage {
  public:
   static constexpr uint16_t MESSAGE_TYPE = 16;
-  static constexpr uint16_t ESTIMATED_SIZE = 73;
+  static constexpr uint16_t ESTIMATED_SIZE = 77;
 #ifdef HAS_PROTO_MESSAGE_DUMP
   static constexpr const char *message_name() { return "list_entities_sensor_response"; }
 #endif
@@ -823,7 +856,7 @@ class SensorStateResponse : public StateResponseProtoMessage {
 class ListEntitiesSwitchResponse : public InfoResponseProtoMessage {
  public:
   static constexpr uint16_t MESSAGE_TYPE = 17;
-  static constexpr uint16_t ESTIMATED_SIZE = 56;
+  static constexpr uint16_t ESTIMATED_SIZE = 60;
 #ifdef HAS_PROTO_MESSAGE_DUMP
   static constexpr const char *message_name() { return "list_entities_switch_response"; }
 #endif
@@ -880,7 +913,7 @@ class SwitchCommandRequest : public ProtoMessage {
 class ListEntitiesTextSensorResponse : public InfoResponseProtoMessage {
  public:
   static constexpr uint16_t MESSAGE_TYPE = 18;
-  static constexpr uint16_t ESTIMATED_SIZE = 54;
+  static constexpr uint16_t ESTIMATED_SIZE = 58;
 #ifdef HAS_PROTO_MESSAGE_DUMP
   static constexpr const char *message_name() { return "list_entities_text_sensor_response"; }
 #endif
@@ -1196,7 +1229,7 @@ class ExecuteServiceRequest : public ProtoMessage {
 class ListEntitiesCameraResponse : public InfoResponseProtoMessage {
  public:
   static constexpr uint16_t MESSAGE_TYPE = 43;
-  static constexpr uint16_t ESTIMATED_SIZE = 45;
+  static constexpr uint16_t ESTIMATED_SIZE = 49;
 #ifdef HAS_PROTO_MESSAGE_DUMP
   static constexpr const char *message_name() { return "list_entities_camera_response"; }
 #endif
@@ -1253,7 +1286,7 @@ class CameraImageRequest : public ProtoMessage {
 class ListEntitiesClimateResponse : public InfoResponseProtoMessage {
  public:
   static constexpr uint16_t MESSAGE_TYPE = 46;
-  static constexpr uint16_t ESTIMATED_SIZE = 151;
+  static constexpr uint16_t ESTIMATED_SIZE = 156;
 #ifdef HAS_PROTO_MESSAGE_DUMP
   static constexpr const char *message_name() { return "list_entities_climate_response"; }
 #endif
@@ -1362,7 +1395,7 @@ class ClimateCommandRequest : public ProtoMessage {
 class ListEntitiesNumberResponse : public InfoResponseProtoMessage {
  public:
   static constexpr uint16_t MESSAGE_TYPE = 49;
-  static constexpr uint16_t ESTIMATED_SIZE = 80;
+  static constexpr uint16_t ESTIMATED_SIZE = 84;
 #ifdef HAS_PROTO_MESSAGE_DUMP
   static constexpr const char *message_name() { return "list_entities_number_response"; }
 #endif
@@ -1423,7 +1456,7 @@ class NumberCommandRequest : public ProtoMessage {
 class ListEntitiesSelectResponse : public InfoResponseProtoMessage {
  public:
   static constexpr uint16_t MESSAGE_TYPE = 52;
-  static constexpr uint16_t ESTIMATED_SIZE = 63;
+  static constexpr uint16_t ESTIMATED_SIZE = 67;
 #ifdef HAS_PROTO_MESSAGE_DUMP
   static constexpr const char *message_name() { return "list_entities_select_response"; }
 #endif
@@ -1481,7 +1514,7 @@ class SelectCommandRequest : public ProtoMessage {
 class ListEntitiesSirenResponse : public InfoResponseProtoMessage {
  public:
   static constexpr uint16_t MESSAGE_TYPE = 55;
-  static constexpr uint16_t ESTIMATED_SIZE = 67;
+  static constexpr uint16_t ESTIMATED_SIZE = 71;
 #ifdef HAS_PROTO_MESSAGE_DUMP
   static constexpr const char *message_name() { return "list_entities_siren_response"; }
 #endif
@@ -1547,7 +1580,7 @@ class SirenCommandRequest : public ProtoMessage {
 class ListEntitiesLockResponse : public InfoResponseProtoMessage {
  public:
   static constexpr uint16_t MESSAGE_TYPE = 58;
-  static constexpr uint16_t ESTIMATED_SIZE = 60;
+  static constexpr uint16_t ESTIMATED_SIZE = 64;
 #ifdef HAS_PROTO_MESSAGE_DUMP
   static constexpr const char *message_name() { return "list_entities_lock_response"; }
 #endif
@@ -1609,7 +1642,7 @@ class LockCommandRequest : public ProtoMessage {
 class ListEntitiesButtonResponse : public InfoResponseProtoMessage {
  public:
   static constexpr uint16_t MESSAGE_TYPE = 61;
-  static constexpr uint16_t ESTIMATED_SIZE = 54;
+  static constexpr uint16_t ESTIMATED_SIZE = 58;
 #ifdef HAS_PROTO_MESSAGE_DUMP
   static constexpr const char *message_name() { return "list_entities_button_response"; }
 #endif
@@ -1662,7 +1695,7 @@ class MediaPlayerSupportedFormat : public ProtoMessage {
 class ListEntitiesMediaPlayerResponse : public InfoResponseProtoMessage {
  public:
   static constexpr uint16_t MESSAGE_TYPE = 63;
-  static constexpr uint16_t ESTIMATED_SIZE = 81;
+  static constexpr uint16_t ESTIMATED_SIZE = 85;
 #ifdef HAS_PROTO_MESSAGE_DUMP
   static constexpr const char *message_name() { return "list_entities_media_player_response"; }
 #endif
@@ -2532,7 +2565,7 @@ class VoiceAssistantSetConfiguration : public ProtoMessage {
 class ListEntitiesAlarmControlPanelResponse : public InfoResponseProtoMessage {
  public:
   static constexpr uint16_t MESSAGE_TYPE = 94;
-  static constexpr uint16_t ESTIMATED_SIZE = 53;
+  static constexpr uint16_t ESTIMATED_SIZE = 57;
 #ifdef HAS_PROTO_MESSAGE_DUMP
   static constexpr const char *message_name() { return "list_entities_alarm_control_panel_response"; }
 #endif
@@ -2592,7 +2625,7 @@ class AlarmControlPanelCommandRequest : public ProtoMessage {
 class ListEntitiesTextResponse : public InfoResponseProtoMessage {
  public:
   static constexpr uint16_t MESSAGE_TYPE = 97;
-  static constexpr uint16_t ESTIMATED_SIZE = 64;
+  static constexpr uint16_t ESTIMATED_SIZE = 68;
 #ifdef HAS_PROTO_MESSAGE_DUMP
   static constexpr const char *message_name() { return "list_entities_text_response"; }
 #endif
@@ -2653,7 +2686,7 @@ class TextCommandRequest : public ProtoMessage {
 class ListEntitiesDateResponse : public InfoResponseProtoMessage {
  public:
   static constexpr uint16_t MESSAGE_TYPE = 100;
-  static constexpr uint16_t ESTIMATED_SIZE = 45;
+  static constexpr uint16_t ESTIMATED_SIZE = 49;
 #ifdef HAS_PROTO_MESSAGE_DUMP
   static constexpr const char *message_name() { return "list_entities_date_response"; }
 #endif
@@ -2713,7 +2746,7 @@ class DateCommandRequest : public ProtoMessage {
 class ListEntitiesTimeResponse : public InfoResponseProtoMessage {
  public:
   static constexpr uint16_t MESSAGE_TYPE = 103;
-  static constexpr uint16_t ESTIMATED_SIZE = 45;
+  static constexpr uint16_t ESTIMATED_SIZE = 49;
 #ifdef HAS_PROTO_MESSAGE_DUMP
   static constexpr const char *message_name() { return "list_entities_time_response"; }
 #endif
@@ -2773,7 +2806,7 @@ class TimeCommandRequest : public ProtoMessage {
 class ListEntitiesEventResponse : public InfoResponseProtoMessage {
  public:
   static constexpr uint16_t MESSAGE_TYPE = 107;
-  static constexpr uint16_t ESTIMATED_SIZE = 72;
+  static constexpr uint16_t ESTIMATED_SIZE = 76;
 #ifdef HAS_PROTO_MESSAGE_DUMP
   static constexpr const char *message_name() { return "list_entities_event_response"; }
 #endif
@@ -2811,7 +2844,7 @@ class EventResponse : public StateResponseProtoMessage {
 class ListEntitiesValveResponse : public InfoResponseProtoMessage {
  public:
   static constexpr uint16_t MESSAGE_TYPE = 109;
-  static constexpr uint16_t ESTIMATED_SIZE = 60;
+  static constexpr uint16_t ESTIMATED_SIZE = 64;
 #ifdef HAS_PROTO_MESSAGE_DUMP
   static constexpr const char *message_name() { return "list_entities_valve_response"; }
 #endif
@@ -2873,7 +2906,7 @@ class ValveCommandRequest : public ProtoMessage {
 class ListEntitiesDateTimeResponse : public InfoResponseProtoMessage {
  public:
   static constexpr uint16_t MESSAGE_TYPE = 112;
-  static constexpr uint16_t ESTIMATED_SIZE = 45;
+  static constexpr uint16_t ESTIMATED_SIZE = 49;
 #ifdef HAS_PROTO_MESSAGE_DUMP
   static constexpr const char *message_name() { return "list_entities_date_time_response"; }
 #endif
@@ -2928,7 +2961,7 @@ class DateTimeCommandRequest : public ProtoMessage {
 class ListEntitiesUpdateResponse : public InfoResponseProtoMessage {
  public:
   static constexpr uint16_t MESSAGE_TYPE = 116;
-  static constexpr uint16_t ESTIMATED_SIZE = 54;
+  static constexpr uint16_t ESTIMATED_SIZE = 58;
 #ifdef HAS_PROTO_MESSAGE_DUMP
   static constexpr const char *message_name() { return "list_entities_update_response"; }
 #endif

esphome/components/binary_sensor/__init__.py

@@ -60,8 +60,8 @@ from esphome.const import (
     DEVICE_CLASS_WINDOW,
 )
 from esphome.core import CORE, coroutine_with_priority
+from esphome.core.entity_helpers import entity_duplicate_validator, setup_entity
 from esphome.cpp_generator import MockObjClass
-from esphome.cpp_helpers import setup_entity
 from esphome.util import Registry
 
 CODEOWNERS = ["@esphome/core"]
@@ -491,6 +491,9 @@ _BINARY_SENSOR_SCHEMA = (
 )
 
 
+_BINARY_SENSOR_SCHEMA.add_extra(entity_duplicate_validator("binary_sensor"))
+
+
 def binary_sensor_schema(
     class_: MockObjClass = cv.UNDEFINED,
     *,
@@ -521,7 +524,7 @@ BINARY_SENSOR_SCHEMA.add_extra(cv.deprecated_schema_constant("binary_sensor"))
 
 
 async def setup_binary_sensor_core_(var, config):
-    await setup_entity(var, config)
+    await setup_entity(var, config, "binary_sensor")
 
     if (device_class := config.get(CONF_DEVICE_CLASS)) is not None:
         cg.add(var.set_device_class(device_class))

esphome/components/button/__init__.py

@@ -18,8 +18,8 @@ from esphome.const import (
     DEVICE_CLASS_UPDATE,
 )
 from esphome.core import CORE, coroutine_with_priority
+from esphome.core.entity_helpers import entity_duplicate_validator, setup_entity
 from esphome.cpp_generator import MockObjClass
-from esphome.cpp_helpers import setup_entity
 
 CODEOWNERS = ["@esphome/core"]
 IS_PLATFORM_COMPONENT = True
@@ -61,6 +61,9 @@ _BUTTON_SCHEMA = (
 )
 
 
+_BUTTON_SCHEMA.add_extra(entity_duplicate_validator("button"))
+
+
 def button_schema(
     class_: MockObjClass,
     *,
@@ -87,7 +90,7 @@ BUTTON_SCHEMA.add_extra(cv.deprecated_schema_constant("button"))
 
 
 async def setup_button_core_(var, config):
-    await setup_entity(var, config)
+    await setup_entity(var, config, "button")
 
     for conf in config.get(CONF_ON_PRESS, []):
         trigger = cg.new_Pvariable(conf[CONF_TRIGGER_ID], var)

esphome/components/climate/__init__.py

@@ -48,8 +48,8 @@ from esphome.const import (
     CONF_WEB_SERVER,
 )
 from esphome.core import CORE, coroutine_with_priority
+from esphome.core.entity_helpers import entity_duplicate_validator, setup_entity
 from esphome.cpp_generator import MockObjClass
-from esphome.cpp_helpers import setup_entity
 
 IS_PLATFORM_COMPONENT = True
 
@@ -247,6 +247,9 @@ _CLIMATE_SCHEMA = (
 )
 
 
+_CLIMATE_SCHEMA.add_extra(entity_duplicate_validator("climate"))
+
+
 def climate_schema(
     class_: MockObjClass,
     *,
@@ -273,7 +276,7 @@ CLIMATE_SCHEMA.add_extra(cv.deprecated_schema_constant("climate"))
 
 
 async def setup_climate_core_(var, config):
-    await setup_entity(var, config)
+    await setup_entity(var, config, "climate")
 
     visual = config[CONF_VISUAL]
     if (min_temp := visual.get(CONF_MIN_TEMPERATURE)) is not None:

esphome/components/cover/__init__.py

@@ -33,8 +33,8 @@ from esphome.const import (
     DEVICE_CLASS_WINDOW,
 )
 from esphome.core import CORE, coroutine_with_priority
+from esphome.core.entity_helpers import entity_duplicate_validator, setup_entity
 from esphome.cpp_generator import MockObjClass
-from esphome.cpp_helpers import setup_entity
 
 IS_PLATFORM_COMPONENT = True
 
@@ -126,6 +126,9 @@ _COVER_SCHEMA = (
 )
 
 
+_COVER_SCHEMA.add_extra(entity_duplicate_validator("cover"))
+
+
 def cover_schema(
     class_: MockObjClass,
     *,
@@ -154,7 +157,7 @@ COVER_SCHEMA.add_extra(cv.deprecated_schema_constant("cover"))
 
 
 async def setup_cover_core_(var, config):
-    await setup_entity(var, config)
+    await setup_entity(var, config, "cover")
 
     if (device_class := config.get(CONF_DEVICE_CLASS)) is not None:
         cg.add(var.set_device_class(device_class))

esphome/components/datetime/__init__.py

@@ -22,8 +22,8 @@ from esphome.const import (
     CONF_YEAR,
 )
 from esphome.core import CORE, coroutine_with_priority
+from esphome.core.entity_helpers import entity_duplicate_validator, setup_entity
 from esphome.cpp_generator import MockObjClass
-from esphome.cpp_helpers import setup_entity
 
 CODEOWNERS = ["@rfdarter", "@jesserockz"]
 
@@ -84,6 +84,8 @@ _DATETIME_SCHEMA = cv.ENTITY_BASE_SCHEMA.extend(
     .extend(cv.MQTT_COMMAND_COMPONENT_SCHEMA)
 ).add_extra(_validate_time_present)
 
+_DATETIME_SCHEMA.add_extra(entity_duplicate_validator("datetime"))
+
 
 def date_schema(class_: MockObjClass) -> cv.Schema:
     schema = cv.Schema(
@@ -133,7 +135,7 @@ def datetime_schema(class_: MockObjClass) -> cv.Schema:
 
 
 async def setup_datetime_core_(var, config):
-    await setup_entity(var, config)
+    await setup_entity(var, config, "datetime")
 
     if (mqtt_id := config.get(CONF_MQTT_ID)) is not None:
         mqtt_ = cg.new_Pvariable(mqtt_id, var)

esphome/components/demo/__init__.py

@@ -455,7 +455,7 @@ CONFIG_SCHEMA = cv.Schema(
                     CONF_NAME: "Demo Plain Sensor",
                 },
                 {
-                    CONF_NAME: "Demo Temperature Sensor",
+                    CONF_NAME: "Demo Temperature Sensor 1",
                     CONF_UNIT_OF_MEASUREMENT: UNIT_CELSIUS,
                     CONF_ICON: ICON_THERMOMETER,
                     CONF_ACCURACY_DECIMALS: 1,
@@ -463,7 +463,7 @@ CONFIG_SCHEMA = cv.Schema(
                     CONF_STATE_CLASS: STATE_CLASS_MEASUREMENT,
                 },
                 {
-                    CONF_NAME: "Demo Temperature Sensor",
+                    CONF_NAME: "Demo Temperature Sensor 2",
                     CONF_UNIT_OF_MEASUREMENT: UNIT_CELSIUS,
                     CONF_ICON: ICON_THERMOMETER,
                     CONF_ACCURACY_DECIMALS: 1,

esphome/components/esp32_camera/__init__.py

@@ -19,7 +19,7 @@ from esphome.const import (
     CONF_VSYNC_PIN,
 )
 from esphome.core import CORE
-from esphome.cpp_helpers import setup_entity
+from esphome.core.entity_helpers import setup_entity
 
 DEPENDENCIES = ["esp32"]
 
@@ -284,7 +284,7 @@ SETTERS = {
 
 async def to_code(config):
     var = cg.new_Pvariable(config[CONF_ID])
-    await setup_entity(var, config)
+    await setup_entity(var, config, "camera")
     await cg.register_component(var, config)
 
     for key, setter in SETTERS.items():

esphome/components/event/__init__.py

@@ -18,8 +18,8 @@ from esphome.const import (
     DEVICE_CLASS_MOTION,
 )
 from esphome.core import CORE, coroutine_with_priority
+from esphome.core.entity_helpers import entity_duplicate_validator, setup_entity
 from esphome.cpp_generator import MockObjClass
-from esphome.cpp_helpers import setup_entity
 
 CODEOWNERS = ["@nohat"]
 IS_PLATFORM_COMPONENT = True
@@ -59,6 +59,9 @@ _EVENT_SCHEMA = (
 )
 
 
+_EVENT_SCHEMA.add_extra(entity_duplicate_validator("event"))
+
+
 def event_schema(
     class_: MockObjClass = cv.UNDEFINED,
     *,
@@ -88,7 +91,7 @@ EVENT_SCHEMA.add_extra(cv.deprecated_schema_constant("event"))
 
 
 async def setup_event_core_(var, config, *, event_types: list[str]):
-    await setup_entity(var, config)
+    await setup_entity(var, config, "event")
 
     for conf in config.get(CONF_ON_EVENT, []):
         trigger = cg.new_Pvariable(conf[CONF_TRIGGER_ID], var)

esphome/components/fan/__init__.py

@@ -32,7 +32,7 @@ from esphome.const import (
     CONF_WEB_SERVER,
 )
 from esphome.core import CORE, coroutine_with_priority
-from esphome.cpp_helpers import setup_entity
+from esphome.core.entity_helpers import entity_duplicate_validator, setup_entity
 
 IS_PLATFORM_COMPONENT = True
 
@@ -161,6 +161,9 @@ _FAN_SCHEMA = (
 )
 
 
+_FAN_SCHEMA.add_extra(entity_duplicate_validator("fan"))
+
+
 def fan_schema(
     class_: cg.Pvariable,
     *,
@@ -225,7 +228,7 @@ def validate_preset_modes(value):
 
 
 async def setup_fan_core_(var, config):
-    await setup_entity(var, config)
+    await setup_entity(var, config, "fan")
 
     cg.add(var.set_restore_mode(config[CONF_RESTORE_MODE]))
 

esphome/components/light/__init__.py

@@ -38,8 +38,8 @@ from esphome.const import (
     CONF_WHITE,
 )
 from esphome.core import CORE, coroutine_with_priority
+from esphome.core.entity_helpers import entity_duplicate_validator, setup_entity
 from esphome.cpp_generator import MockObjClass
-from esphome.cpp_helpers import setup_entity
 
 from .automation import LIGHT_STATE_SCHEMA
 from .effects import (
@@ -110,6 +110,8 @@ LIGHT_SCHEMA = (
     )
 )
 
+LIGHT_SCHEMA.add_extra(entity_duplicate_validator("light"))
+
 BINARY_LIGHT_SCHEMA = LIGHT_SCHEMA.extend(
     {
         cv.Optional(CONF_EFFECTS): validate_effects(BINARY_EFFECTS),
@@ -207,7 +209,7 @@ def validate_color_temperature_channels(value):
 
 
 async def setup_light_core_(light_var, output_var, config):
-    await setup_entity(light_var, config)
+    await setup_entity(light_var, config, "light")
 
     cg.add(light_var.set_restore_mode(config[CONF_RESTORE_MODE]))
 

esphome/components/lock/__init__.py

@@ -14,8 +14,8 @@ from esphome.const import (
     CONF_WEB_SERVER,
 )
 from esphome.core import CORE, coroutine_with_priority
+from esphome.core.entity_helpers import entity_duplicate_validator, setup_entity
 from esphome.cpp_generator import MockObjClass
-from esphome.cpp_helpers import setup_entity
 
 CODEOWNERS = ["@esphome/core"]
 IS_PLATFORM_COMPONENT = True
@@ -67,6 +67,9 @@ _LOCK_SCHEMA = (
 )
 
 
+_LOCK_SCHEMA.add_extra(entity_duplicate_validator("lock"))
+
+
 def lock_schema(
     class_: MockObjClass = cv.UNDEFINED,
     *,
@@ -94,7 +97,7 @@ LOCK_SCHEMA.add_extra(cv.deprecated_schema_constant("lock"))
 
 
 async def _setup_lock_core(var, config):
-    await setup_entity(var, config)
+    await setup_entity(var, config, "lock")
 
     for conf in config.get(CONF_ON_LOCK, []):
         trigger = cg.new_Pvariable(conf[CONF_TRIGGER_ID], var)

esphome/components/media_player/__init__.py

@@ -11,9 +11,9 @@ from esphome.const import (
     CONF_VOLUME,
 )
 from esphome.core import CORE
+from esphome.core.entity_helpers import entity_duplicate_validator, setup_entity
 from esphome.coroutine import coroutine_with_priority
 from esphome.cpp_generator import MockObjClass
-from esphome.cpp_helpers import setup_entity
 
 CODEOWNERS = ["@jesserockz"]
 
@@ -81,7 +81,7 @@ IsAnnouncingCondition = media_player_ns.class_(
 
 
 async def setup_media_player_core_(var, config):
-    await setup_entity(var, config)
+    await setup_entity(var, config, "media_player")
     for conf in config.get(CONF_ON_STATE, []):
         trigger = cg.new_Pvariable(conf[CONF_TRIGGER_ID], var)
         await automation.build_automation(trigger, [], conf)
@@ -143,6 +143,8 @@ _MEDIA_PLAYER_SCHEMA = cv.ENTITY_BASE_SCHEMA.extend(
     }
 )
 
+_MEDIA_PLAYER_SCHEMA.add_extra(entity_duplicate_validator("media_player"))
+
 
 def media_player_schema(
     class_: MockObjClass,
@@ -166,7 +168,6 @@ def media_player_schema(
 MEDIA_PLAYER_SCHEMA = media_player_schema(MediaPlayer)
 MEDIA_PLAYER_SCHEMA.add_extra(cv.deprecated_schema_constant("media_player"))
 
-
 MEDIA_PLAYER_ACTION_SCHEMA = automation.maybe_simple_id(
     cv.Schema(
         {

esphome/components/number/__init__.py

@@ -76,8 +76,8 @@ from esphome.const import (
     DEVICE_CLASS_WIND_SPEED,
 )
 from esphome.core import CORE, coroutine_with_priority
+from esphome.core.entity_helpers import entity_duplicate_validator, setup_entity
 from esphome.cpp_generator import MockObjClass
-from esphome.cpp_helpers import setup_entity
 
 CODEOWNERS = ["@esphome/core"]
 DEVICE_CLASSES = [
@@ -207,6 +207,9 @@ _NUMBER_SCHEMA = (
 )
 
 
+_NUMBER_SCHEMA.add_extra(entity_duplicate_validator("number"))
+
+
 def number_schema(
     class_: MockObjClass,
     *,
@@ -237,7 +240,7 @@ NUMBER_SCHEMA.add_extra(cv.deprecated_schema_constant("number"))
 async def setup_number_core_(
     var, config, *, min_value: float, max_value: float, step: float
 ):
-    await setup_entity(var, config)
+    await setup_entity(var, config, "number")
 
     cg.add(var.traits.set_min_value(min_value))
     cg.add(var.traits.set_max_value(max_value))

esphome/components/select/__init__.py

@@ -17,8 +17,8 @@ from esphome.const import (
     CONF_WEB_SERVER,
 )
 from esphome.core import CORE, coroutine_with_priority
+from esphome.core.entity_helpers import entity_duplicate_validator, setup_entity
 from esphome.cpp_generator import MockObjClass
-from esphome.cpp_helpers import setup_entity
 
 CODEOWNERS = ["@esphome/core"]
 IS_PLATFORM_COMPONENT = True
@@ -65,6 +65,9 @@ _SELECT_SCHEMA = (
 )
 
 
+_SELECT_SCHEMA.add_extra(entity_duplicate_validator("select"))
+
+
 def select_schema(
     class_: MockObjClass,
     *,
@@ -89,7 +92,7 @@ SELECT_SCHEMA.add_extra(cv.deprecated_schema_constant("select"))
 
 
 async def setup_select_core_(var, config, *, options: list[str]):
-    await setup_entity(var, config)
+    await setup_entity(var, config, "select")
 
     cg.add(var.traits.set_options(options))
 

esphome/components/sensor/__init__.py

@@ -101,8 +101,8 @@ from esphome.const import (
     ENTITY_CATEGORY_CONFIG,
 )
 from esphome.core import CORE, coroutine_with_priority
+from esphome.core.entity_helpers import entity_duplicate_validator, setup_entity
 from esphome.cpp_generator import MockObjClass
-from esphome.cpp_helpers import setup_entity
 from esphome.util import Registry
 
 CODEOWNERS = ["@esphome/core"]
@@ -318,6 +318,8 @@ _SENSOR_SCHEMA = (
     )
 )
 
+_SENSOR_SCHEMA.add_extra(entity_duplicate_validator("sensor"))
+
 
 def sensor_schema(
     class_: MockObjClass = cv.UNDEFINED,
@@ -787,7 +789,7 @@ async def build_filters(config):
 
 
 async def setup_sensor_core_(var, config):
-    await setup_entity(var, config)
+    await setup_entity(var, config, "sensor")
 
     if (device_class := config.get(CONF_DEVICE_CLASS)) is not None:
         cg.add(var.set_device_class(device_class))

esphome/components/switch/__init__.py

@@ -20,8 +20,8 @@ from esphome.const import (
     DEVICE_CLASS_SWITCH,
 )
 from esphome.core import CORE, coroutine_with_priority
+from esphome.core.entity_helpers import entity_duplicate_validator, setup_entity
 from esphome.cpp_generator import MockObjClass
-from esphome.cpp_helpers import setup_entity
 
 CODEOWNERS = ["@esphome/core"]
 IS_PLATFORM_COMPONENT = True
@@ -91,6 +91,9 @@ _SWITCH_SCHEMA = (
 )
 
 
+_SWITCH_SCHEMA.add_extra(entity_duplicate_validator("switch"))
+
+
 def switch_schema(
     class_: MockObjClass,
     *,
@@ -131,7 +134,7 @@ SWITCH_SCHEMA.add_extra(cv.deprecated_schema_constant("switch"))
 
 
 async def setup_switch_core_(var, config):
-    await setup_entity(var, config)
+    await setup_entity(var, config, "switch")
 
     if (inverted := config.get(CONF_INVERTED)) is not None:
         cg.add(var.set_inverted(inverted))

esphome/components/text/__init__.py

@@ -14,8 +14,8 @@ from esphome.const import (
     CONF_WEB_SERVER,
 )
 from esphome.core import CORE, coroutine_with_priority
+from esphome.core.entity_helpers import entity_duplicate_validator, setup_entity
 from esphome.cpp_generator import MockObjClass
-from esphome.cpp_helpers import setup_entity
 
 CODEOWNERS = ["@mauritskorse"]
 IS_PLATFORM_COMPONENT = True
@@ -58,6 +58,9 @@ _TEXT_SCHEMA = (
 )
 
 
+_TEXT_SCHEMA.add_extra(entity_duplicate_validator("text"))
+
+
 def text_schema(
     class_: MockObjClass = cv.UNDEFINED,
     *,
@@ -94,7 +97,7 @@ async def setup_text_core_(
     max_length: int | None,
     pattern: str | None,
 ):
-    await setup_entity(var, config)
+    await setup_entity(var, config, "text")
 
     cg.add(var.traits.set_min_length(min_length))
     cg.add(var.traits.set_max_length(max_length))

esphome/components/text_sensor/__init__.py

@@ -21,8 +21,8 @@ from esphome.const import (
     DEVICE_CLASS_TIMESTAMP,
 )
 from esphome.core import CORE, coroutine_with_priority
+from esphome.core.entity_helpers import entity_duplicate_validator, setup_entity
 from esphome.cpp_generator import MockObjClass
-from esphome.cpp_helpers import setup_entity
 from esphome.util import Registry
 
 DEVICE_CLASSES = [
@@ -153,6 +153,9 @@ _TEXT_SENSOR_SCHEMA = (
 )
 
 
+_TEXT_SENSOR_SCHEMA.add_extra(entity_duplicate_validator("text_sensor"))
+
+
 def text_sensor_schema(
     class_: MockObjClass = cv.UNDEFINED,
     *,
@@ -186,7 +189,7 @@ async def build_filters(config):
 
 
 async def setup_text_sensor_core_(var, config):
-    await setup_entity(var, config)
+    await setup_entity(var, config, "text_sensor")
 
     if (device_class := config.get(CONF_DEVICE_CLASS)) is not None:
         cg.add(var.set_device_class(device_class))

esphome/components/update/__init__.py

@@ -15,8 +15,8 @@ from esphome.const import (
     ENTITY_CATEGORY_CONFIG,
 )
 from esphome.core import CORE, coroutine_with_priority
+from esphome.core.entity_helpers import entity_duplicate_validator, setup_entity
 from esphome.cpp_generator import MockObjClass
-from esphome.cpp_helpers import setup_entity
 
 CODEOWNERS = ["@jesserockz"]
 IS_PLATFORM_COMPONENT = True
@@ -58,6 +58,9 @@ _UPDATE_SCHEMA = (
 )
 
 
+_UPDATE_SCHEMA.add_extra(entity_duplicate_validator("update"))
+
+
 def update_schema(
     class_: MockObjClass = cv.UNDEFINED,
     *,
@@ -87,7 +90,7 @@ UPDATE_SCHEMA.add_extra(cv.deprecated_schema_constant("update"))
 
 
 async def setup_update_core_(var, config):
-    await setup_entity(var, config)
+    await setup_entity(var, config, "update")
 
     if device_class_config := config.get(CONF_DEVICE_CLASS):
         cg.add(var.set_device_class(device_class_config))

esphome/components/valve/__init__.py

@@ -22,8 +22,8 @@ from esphome.const import (
     DEVICE_CLASS_WATER,
 )
 from esphome.core import CORE, coroutine_with_priority
+from esphome.core.entity_helpers import entity_duplicate_validator, setup_entity
 from esphome.cpp_generator import MockObjClass
-from esphome.cpp_helpers import setup_entity
 
 IS_PLATFORM_COMPONENT = True
 
@@ -103,6 +103,9 @@ _VALVE_SCHEMA = (
 )
 
 
+_VALVE_SCHEMA.add_extra(entity_duplicate_validator("valve"))
+
+
 def valve_schema(
     class_: MockObjClass = cv.UNDEFINED,
     *,
@@ -132,7 +135,7 @@ VALVE_SCHEMA.add_extra(cv.deprecated_schema_constant("valve"))
 
 
 async def _setup_valve_core(var, config):
-    await setup_entity(var, config)
+    await setup_entity(var, config, "valve")
 
     if device_class_config := config.get(CONF_DEVICE_CLASS):
         cg.add(var.set_device_class(device_class_config))

esphome/config_validation.py

@@ -1,5 +1,7 @@
 """Helpers for config validation using voluptuous."""
 
+from __future__ import annotations
+
 from contextlib import contextmanager
 from dataclasses import dataclass
 from datetime import datetime
@@ -29,6 +31,7 @@ from esphome.const import (
     CONF_COMMAND_RETAIN,
     CONF_COMMAND_TOPIC,
     CONF_DAY,
+    CONF_DEVICE_ID,
     CONF_DISABLED_BY_DEFAULT,
     CONF_DISCOVERY,
     CONF_ENTITY_CATEGORY,
@@ -355,6 +358,13 @@ def icon(value):
     )
 
 
+def sub_device_id(value: str | None) -> core.ID:
+    # Lazy import to avoid circular imports
+    from esphome.core.config import Device
+
+    return use_id(Device)(value)
+
+
 def boolean(value):
     """Validate the given config option to be a boolean.
 
@@ -1896,6 +1906,7 @@ ENTITY_BASE_SCHEMA = Schema(
         Optional(CONF_DISABLED_BY_DEFAULT, default=False): boolean,
         Optional(CONF_ICON): icon,
         Optional(CONF_ENTITY_CATEGORY): entity_category,
+        Optional(CONF_DEVICE_ID): sub_device_id,
     }
 )
 
@@ -1964,7 +1975,7 @@ class Version:
         return f"{self.major}.{self.minor}.{self.patch}"
 
     @classmethod
-    def parse(cls, value: str) -> "Version":
+    def parse(cls, value: str) -> Version:
         match = re.match(r"^(\d+).(\d+).(\d+)-?\w*$", value)
         if match is None:
             raise ValueError(f"Not a valid version number {value}")

esphome/const.py

@@ -56,6 +56,8 @@ CONF_AP = "ap"
 CONF_APPARENT_POWER = "apparent_power"
 CONF_ARDUINO_VERSION = "arduino_version"
 CONF_AREA = "area"
+CONF_AREA_ID = "area_id"
+CONF_AREAS = "areas"
 CONF_ARGS = "args"
 CONF_ASSUMED_STATE = "assumed_state"
 CONF_AT = "at"
@@ -217,6 +219,7 @@ CONF_DEST = "dest"
 CONF_DEVICE = "device"
 CONF_DEVICE_CLASS = "device_class"
 CONF_DEVICE_FACTOR = "device_factor"
+CONF_DEVICE_ID = "device_id"
 CONF_DEVICES = "devices"
 CONF_DIELECTRIC_CONSTANT = "dielectric_constant"
 CONF_DIMENSIONS = "dimensions"

esphome/core/__init__.py

@@ -522,6 +522,9 @@ class EsphomeCore:
         # Dict to track platform entity counts for pre-allocation
         # Key: platform name (e.g. "sensor", "binary_sensor"), Value: count
         self.platform_counts: defaultdict[str, int] = defaultdict(int)
+        # Track entity unique IDs to handle duplicates
+        # Set of (device_id, platform, sanitized_name) tuples
+        self.unique_ids: set[tuple[str, str, str]] = set()
         # Whether ESPHome was started in verbose mode
         self.verbose = False
         # Whether ESPHome was started in quiet mode
@@ -553,6 +556,7 @@ class EsphomeCore:
         self.loaded_integrations = set()
         self.component_ids = set()
         self.platform_counts = defaultdict(int)
+        self.unique_ids = set()
         PIN_SCHEMA_REGISTRY.reset()
 
     @property

esphome/core/application.h

@@ -9,6 +9,13 @@
 #include "esphome/core/preferences.h"
 #include "esphome/core/scheduler.h"
 
+#ifdef USE_DEVICES
+#include "esphome/core/device.h"
+#endif
+#ifdef USE_AREAS
+#include "esphome/core/area.h"
+#endif
+
 #ifdef USE_SOCKET_SELECT_SUPPORT
 #include <sys/select.h>
 #endif
@@ -87,7 +94,7 @@ static const uint32_t TEARDOWN_TIMEOUT_REBOOT_MS = 1000;  // 1 second for quick
 
 class Application {
  public:
-  void pre_setup(const std::string &name, const std::string &friendly_name, const char *area, const char *comment,
+  void pre_setup(const std::string &name, const std::string &friendly_name, const char *comment,
                  const char *compilation_time, bool name_add_mac_suffix) {
     arch_init();
     this->name_add_mac_suffix_ = name_add_mac_suffix;
@@ -102,11 +109,17 @@ class Application {
       this->name_ = name;
       this->friendly_name_ = friendly_name;
     }
-    this->area_ = area;
     this->comment_ = comment;
     this->compilation_time_ = compilation_time;
   }
 
+#ifdef USE_DEVICES
+  void register_device(Device *device) { this->devices_.push_back(device); }
+#endif
+#ifdef USE_AREAS
+  void register_area(Area *area) { this->areas_.push_back(area); }
+#endif
+
   void set_current_component(Component *component) { this->current_component_ = component; }
   Component *get_current_component() { return this->current_component_; }
 
@@ -264,6 +277,12 @@ class Application {
 #ifdef USE_UPDATE
   void reserve_update(size_t count) { this->updates_.reserve(count); }
 #endif
+#ifdef USE_AREAS
+  void reserve_area(size_t count) { this->areas_.reserve(count); }
+#endif
+#ifdef USE_DEVICES
+  void reserve_device(size_t count) { this->devices_.reserve(count); }
+#endif
 
   /// Register the component in this Application instance.
   template<class C> C *register_component(C *c) {
@@ -285,7 +304,15 @@ class Application {
   const std::string &get_friendly_name() const { return this->friendly_name_; }
 
   /// Get the area of this Application set by pre_setup().
-  std::string get_area() const { return this->area_ == nullptr ? "" : this->area_; }
+  const char *get_area() const {
+#ifdef USE_AREAS
+    // If we have areas registered, return the name of the first one (which is the top-level area)
+    if (!this->areas_.empty() && this->areas_[0] != nullptr) {
+      return this->areas_[0]->get_name();
+    }
+#endif
+    return "";
+  }
 
   /// Get the comment of this Application set by pre_setup().
   std::string get_comment() const { return this->comment_; }
@@ -334,6 +361,12 @@ class Application {
 
   uint8_t get_app_state() const { return this->app_state_; }
 
+#ifdef USE_DEVICES
+  const std::vector<Device *> &get_devices() { return this->devices_; }
+#endif
+#ifdef USE_AREAS
+  const std::vector<Area *> &get_areas() { return this->areas_; }
+#endif
 #ifdef USE_BINARY_SENSOR
   const std::vector<binary_sensor::BinarySensor *> &get_binary_sensors() { return this->binary_sensors_; }
   binary_sensor::BinarySensor *get_binary_sensor_by_key(uint32_t key, bool include_internal = false) {
@@ -610,6 +643,12 @@ class Application {
   uint16_t current_loop_index_{0};
   bool in_loop_{false};
 
+#ifdef USE_DEVICES
+  std::vector<Device *> devices_{};
+#endif
+#ifdef USE_AREAS
+  std::vector<Area *> areas_{};
+#endif
 #ifdef USE_BINARY_SENSOR
   std::vector<binary_sensor::BinarySensor *> binary_sensors_{};
 #endif
@@ -676,7 +715,6 @@ class Application {
 
   std::string name_;
   std::string friendly_name_;
-  const char *area_{nullptr};
   const char *comment_{nullptr};
   const char *compilation_time_{nullptr};
   bool name_add_mac_suffix_;

esphome/core/area.h

@@ -0,0 +1,19 @@
+#pragma once
+
+#include <cstdint>
+
+namespace esphome {
+
+class Area {
+ public:
+  void set_area_id(uint32_t area_id) { this->area_id_ = area_id; }
+  uint32_t get_area_id() { return this->area_id_; }
+  void set_name(const char *name) { this->name_ = name; }
+  const char *get_name() { return this->name_; }
+
+ protected:
+  uint32_t area_id_{};
+  const char *name_ = "";
+};
+
+}  // namespace esphome

esphome/core/config.py

@@ -1,18 +1,24 @@
+from __future__ import annotations
+
 import logging
 import os
 from pathlib import Path
 
-from esphome import automation
+from esphome import automation, core
 import esphome.codegen as cg
 import esphome.config_validation as cv
 from esphome.const import (
     CONF_AREA,
+    CONF_AREA_ID,
+    CONF_AREAS,
     CONF_BUILD_PATH,
     CONF_COMMENT,
     CONF_COMPILE_PROCESS_LIMIT,
     CONF_DEBUG_SCHEDULER,
+    CONF_DEVICES,
     CONF_ESPHOME,
     CONF_FRIENDLY_NAME,
+    CONF_ID,
     CONF_INCLUDES,
     CONF_LIBRARIES,
     CONF_MIN_VERSION,
@@ -32,7 +38,13 @@ from esphome.const import (
     __version__ as ESPHOME_VERSION,
 )
 from esphome.core import CORE, coroutine_with_priority
-from esphome.helpers import copy_file_if_changed, get_str_env, walk_files
+from esphome.helpers import (
+    copy_file_if_changed,
+    fnv1a_32bit_hash,
+    get_str_env,
+    walk_files,
+)
+from esphome.types import ConfigType
 
 _LOGGER = logging.getLogger(__name__)
 
@@ -48,7 +60,8 @@ LoopTrigger = cg.esphome_ns.class_(
 ProjectUpdateTrigger = cg.esphome_ns.class_(
     "ProjectUpdateTrigger", cg.Component, automation.Trigger.template(cg.std_string)
 )
-
+Device = cg.esphome_ns.class_("Device")
+Area = cg.esphome_ns.class_("Area")
 
 VALID_INCLUDE_EXTS = {".h", ".hpp", ".tcc", ".ino", ".cpp", ".c"}
 
@@ -71,6 +84,56 @@ def validate_hostname(config):
     return config
 
 
+def validate_ids_and_references(config: ConfigType) -> ConfigType:
+    """Validate that there are no hash collisions between IDs and that area_id references are valid.
+
+    This validation is critical because we use 32-bit hashes for performance on microcontrollers.
+    By detecting collisions at compile time, we prevent any runtime issues while maintaining
+    optimal performance on 32-bit platforms. In practice, with typical deployments having only
+    a handful of areas and devices, hash collisions are virtually impossible.
+    """
+
+    # Helper to check hash collisions
+    def check_hash_collision(
+        id_obj: core.ID,
+        hash_dict: dict[int, str],
+        item_type: str,
+        path: list[str | int],
+    ) -> None:
+        hash_val: int = fnv1a_32bit_hash(id_obj.id)
+        if hash_val in hash_dict and hash_dict[hash_val] != id_obj.id:
+            raise cv.Invalid(
+                f"{item_type} ID '{id_obj.id}' with hash {hash_val} collides with "
+                f"existing {item_type.lower()} ID '{hash_dict[hash_val]}'",
+                path=path,
+            )
+        hash_dict[hash_val] = id_obj.id
+
+    # Collect all areas
+    all_areas: list[dict[str, str | core.ID]] = []
+    if CONF_AREA in config:
+        all_areas.append(config[CONF_AREA])
+    all_areas.extend(config[CONF_AREAS])
+
+    # Validate area hash collisions and collect IDs
+    area_hashes: dict[int, str] = {}
+    area_ids: set[str] = set()
+    for area in all_areas:
+        area_id: core.ID = area[CONF_ID]
+        check_hash_collision(area_id, area_hashes, "Area", [CONF_AREAS, area_id.id])
+        area_ids.add(area_id.id)
+
+    # Validate device hash collisions and area references
+    device_hashes: dict[int, str] = {}
+    for device in config[CONF_DEVICES]:
+        device_id: core.ID = device[CONF_ID]
+        check_hash_collision(
+            device_id, device_hashes, "Device", [CONF_DEVICES, device_id.id]
+        )
+
+    return config
+
+
 def valid_include(value):
     # Look for "<...>" includes
     if value.startswith("<") and value.endswith(">"):
@@ -111,13 +174,32 @@ if "ESPHOME_DEFAULT_COMPILE_PROCESS_LIMIT" in os.environ:
 else:
     _compile_process_limit_default = cv.UNDEFINED
 
+AREA_SCHEMA = cv.Schema(
+    {
+        cv.GenerateID(CONF_ID): cv.declare_id(Area),
+        cv.Required(CONF_NAME): cv.string,
+    }
+)
+
+DEVICE_SCHEMA = cv.Schema(
+    {
+        cv.GenerateID(CONF_ID): cv.declare_id(Device),
+        cv.Required(CONF_NAME): cv.string,
+        cv.Optional(CONF_AREA_ID): cv.use_id(Area),
+    }
+)
+
+
+def validate_area_config(config: dict | str) -> dict[str, str | core.ID]:
+    return cv.maybe_simple_value(AREA_SCHEMA, key=CONF_NAME)(config)
+
 
 CONFIG_SCHEMA = cv.All(
     cv.Schema(
         {
             cv.Required(CONF_NAME): cv.valid_name,
             cv.Optional(CONF_FRIENDLY_NAME, ""): cv.string,
-            cv.Optional(CONF_AREA, ""): cv.string,
+            cv.Optional(CONF_AREA): validate_area_config,
             cv.Optional(CONF_COMMENT): cv.string,
             cv.Required(CONF_BUILD_PATH): cv.string,
             cv.Optional(CONF_PLATFORMIO_OPTIONS, default={}): cv.Schema(
@@ -167,11 +249,17 @@ CONFIG_SCHEMA = cv.All(
             cv.Optional(
                 CONF_COMPILE_PROCESS_LIMIT, default=_compile_process_limit_default
             ): cv.int_range(min=1, max=get_usable_cpu_count()),
+            cv.Optional(CONF_AREAS, default=[]): cv.ensure_list(AREA_SCHEMA),
+            cv.Optional(CONF_DEVICES, default=[]): cv.ensure_list(DEVICE_SCHEMA),
         }
     ),
     validate_hostname,
 )
 
+
+FINAL_VALIDATE_SCHEMA = cv.All(validate_ids_and_references)
+
+
 PRELOAD_CONFIG_SCHEMA = cv.Schema(
     {
         cv.Required(CONF_NAME): cv.valid_name,
@@ -336,7 +424,7 @@ async def _add_platform_reserves() -> None:
 
 
 @coroutine_with_priority(100.0)
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     cg.add_global(cg.global_ns.namespace("esphome").using)
     # These can be used by user lambdas, put them to default scope
     cg.add_global(cg.RawExpression("using std::isnan"))
@@ -347,7 +435,6 @@ async def to_code(config):
         cg.App.pre_setup(
             config[CONF_NAME],
             config[CONF_FRIENDLY_NAME],
-            config[CONF_AREA],
             config.get(CONF_COMMENT, ""),
             cg.RawExpression('__DATE__ ", " __TIME__'),
             config[CONF_NAME_ADD_MAC_SUFFIX],
@@ -417,3 +504,50 @@ async def to_code(config):
 
     if config[CONF_PLATFORMIO_OPTIONS]:
         CORE.add_job(_add_platformio_options, config[CONF_PLATFORMIO_OPTIONS])
+
+    # Process areas
+    all_areas: list[dict[str, str | core.ID]] = []
+    if CONF_AREA in config:
+        all_areas.append(config[CONF_AREA])
+    all_areas.extend(config[CONF_AREAS])
+
+    if all_areas:
+        cg.add(cg.RawStatement(f"App.reserve_area({len(all_areas)});"))
+        cg.add_define("USE_AREAS")
+
+        for area_conf in all_areas:
+            area_id: core.ID = area_conf[CONF_ID]
+            area_id_hash: int = fnv1a_32bit_hash(area_id.id)
+            area_name: str = area_conf[CONF_NAME]
+
+            area_var = cg.new_Pvariable(area_id)
+            cg.add(area_var.set_area_id(area_id_hash))
+            cg.add(area_var.set_name(area_name))
+            cg.add(cg.App.register_area(area_var))
+
+    # Process devices
+    devices: list[dict[str, str | core.ID]] = config[CONF_DEVICES]
+    if not devices:
+        return
+
+    # Reserve space for devices
+    cg.add(cg.RawStatement(f"App.reserve_device({len(devices)});"))
+    cg.add_define("USE_DEVICES")
+
+    # Process each device
+    for dev_conf in devices:
+        device_id: core.ID = dev_conf[CONF_ID]
+        device_id_hash = fnv1a_32bit_hash(device_id.id)
+        device_name: str = dev_conf[CONF_NAME]
+
+        dev = cg.new_Pvariable(device_id)
+        cg.add(dev.set_device_id(device_id_hash))
+        cg.add(dev.set_name(device_name))
+
+        # Set area if specified
+        if CONF_AREA_ID in dev_conf:
+            area_id: core.ID = dev_conf[CONF_AREA_ID]
+            area_id_hash = fnv1a_32bit_hash(area_id.id)
+            cg.add(dev.set_area_id(area_id_hash))
+
+        cg.add(cg.App.register_device(dev))

esphome/core/defines.h

@@ -20,6 +20,7 @@
 
 // Feature flags
 #define USE_ALARM_CONTROL_PANEL
+#define USE_AREAS
 #define USE_BINARY_SENSOR
 #define USE_BUTTON
 #define USE_CLIMATE
@@ -29,6 +30,7 @@
 #define USE_DATETIME_DATETIME
 #define USE_DATETIME_TIME
 #define USE_DEEP_SLEEP
+#define USE_DEVICES
 #define USE_DISPLAY
 #define USE_ESP32_IMPROV_STATE_CALLBACK
 #define USE_EVENT

esphome/core/device.h

@@ -0,0 +1,20 @@
+#pragma once
+
+namespace esphome {
+
+class Device {
+ public:
+  void set_device_id(uint32_t device_id) { this->device_id_ = device_id; }
+  uint32_t get_device_id() { return this->device_id_; }
+  void set_name(const char *name) { this->name_ = name; }
+  const char *get_name() { return this->name_; }
+  void set_area_id(uint32_t area_id) { this->area_id_ = area_id; }
+  uint32_t get_area_id() { return this->area_id_; }
+
+ protected:
+  uint32_t device_id_{};
+  uint32_t area_id_{};
+  const char *name_ = "";
+};
+
+}  // namespace esphome

esphome/core/entity_base.cpp

@@ -11,7 +11,14 @@ const StringRef &EntityBase::get_name() const { return this->name_; }
 void EntityBase::set_name(const char *name) {
   this->name_ = StringRef(name);
   if (this->name_.empty()) {
-    this->name_ = StringRef(App.get_friendly_name());
+#ifdef USE_DEVICES
+    if (this->device_ != nullptr) {
+      this->name_ = StringRef(this->device_->get_name());
+    } else
+#endif
+    {
+      this->name_ = StringRef(App.get_friendly_name());
+    }
     this->flags_.has_own_name = false;
   } else {
     this->flags_.has_own_name = true;
@@ -47,19 +54,7 @@ void EntityBase::set_object_id(const char *object_id) {
 }
 
 // Calculate Object ID Hash from Entity Name
-void EntityBase::calc_object_id_() {
+void EntityBase::calc_object_id_() { this->object_id_hash_ = fnv1_hash(this->get_object_id()); }
-  // Check if `App.get_friendly_name()` is constant or dynamic.
-  if (!this->flags_.has_own_name && App.is_name_add_mac_suffix_enabled()) {
-    // `App.get_friendly_name()` is dynamic.
-    const auto object_id = str_sanitize(str_snake_case(App.get_friendly_name()));
-    // FNV-1 hash
-    this->object_id_hash_ = fnv1_hash(object_id);
-  } else {
-    // `App.get_friendly_name()` is constant.
-    // FNV-1 hash
-    this->object_id_hash_ = fnv1_hash(this->object_id_c_str_);
-  }
-}
 
 uint32_t EntityBase::get_object_id_hash() { return this->object_id_hash_; }
 

esphome/core/entity_base.h

@@ -6,6 +6,10 @@
 #include "helpers.h"
 #include "log.h"
 
+#ifdef USE_DEVICES
+#include "device.h"
+#endif
+
 namespace esphome {
 
 enum EntityCategory : uint8_t {
@@ -51,6 +55,17 @@ class EntityBase {
   std::string get_icon() const;
   void set_icon(const char *icon);
 
+#ifdef USE_DEVICES
+  // Get/set this entity's device id
+  uint32_t get_device_id() const {
+    if (this->device_ == nullptr) {
+      return 0;  // No device set, return 0
+    }
+    return this->device_->get_device_id();
+  }
+  void set_device(Device *device) { this->device_ = device; }
+#endif
+
   // Check if this entity has state
   bool has_state() const { return this->flags_.has_state; }
 
@@ -67,6 +82,9 @@ class EntityBase {
   const char *object_id_c_str_{nullptr};
   const char *icon_c_str_{nullptr};
   uint32_t object_id_hash_{};
+#ifdef USE_DEVICES
+  Device *device_{};
+#endif
 
   // Bit-packed flags to save memory (1 byte instead of 5)
   struct EntityFlags {

esphome/core/entity_helpers.py

@@ -1,5 +1,116 @@
-from esphome.const import CONF_ID
+from collections.abc import Callable
+import logging
+
+import esphome.config_validation as cv
+from esphome.const import (
+    CONF_DEVICE_ID,
+    CONF_DISABLED_BY_DEFAULT,
+    CONF_ENTITY_CATEGORY,
+    CONF_ICON,
+    CONF_ID,
+    CONF_INTERNAL,
+    CONF_NAME,
+)
+from esphome.core import CORE, ID
+from esphome.cpp_generator import MockObj, add, get_variable
 import esphome.final_validate as fv
+from esphome.helpers import sanitize, snake_case
+from esphome.types import ConfigType
+
+_LOGGER = logging.getLogger(__name__)
+
+
+def get_base_entity_object_id(
+    name: str, friendly_name: str | None, device_name: str | None = None
+) -> str:
+    """Calculate the base object ID for an entity that will be set via set_object_id().
+
+    This function calculates what object_id_c_str_ should be set to in C++.
+
+    The C++ EntityBase::get_object_id() (entity_base.cpp lines 38-49) works as:
+    - If !has_own_name && is_name_add_mac_suffix_enabled():
+        return str_sanitize(str_snake_case(App.get_friendly_name()))  // Dynamic
+    - Else:
+        return object_id_c_str_ ?? ""  // What we set via set_object_id()
+
+    Since we're calculating what to pass to set_object_id(), we always need to
+    generate the object_id the same way, regardless of name_add_mac_suffix setting.
+
+    Args:
+        name: The entity name (empty string if no name)
+        friendly_name: The friendly name from CORE.friendly_name
+        device_name: The device name if entity is on a sub-device
+
+    Returns:
+        The base object ID to use for duplicate checking and to pass to set_object_id()
+    """
+
+    if name:
+        # Entity has its own name (has_own_name will be true)
+        base_str = name
+    elif device_name:
+        # Entity has empty name and is on a sub-device
+        # C++ EntityBase::set_name() uses device->get_name() when device is set
+        base_str = device_name
+    elif friendly_name:
+        # Entity has empty name (has_own_name will be false)
+        # C++ uses App.get_friendly_name() which returns friendly_name or device name
+        base_str = friendly_name
+    else:
+        # Fallback to device name
+        base_str = CORE.name
+
+    return sanitize(snake_case(base_str))
+
+
+async def setup_entity(var: MockObj, config: ConfigType, platform: str) -> None:
+    """Set up generic properties of an Entity.
+
+    This function sets up the common entity properties like name, icon,
+    entity category, etc.
+
+    Args:
+        var: The entity variable to set up
+        config: Configuration dictionary containing entity settings
+        platform: The platform name (e.g., "sensor", "binary_sensor")
+    """
+    # Get device info
+    device_name: str | None = None
+    if CONF_DEVICE_ID in config:
+        device_id_obj: ID = config[CONF_DEVICE_ID]
+        device: MockObj = await get_variable(device_id_obj)
+        add(var.set_device(device))
+        # Get device name for object ID calculation
+        device_name = device_id_obj.id
+
+    add(var.set_name(config[CONF_NAME]))
+
+    # Calculate base object_id using the same logic as C++
+    # This must match the C++ behavior in esphome/core/entity_base.cpp
+    base_object_id = get_base_entity_object_id(
+        config[CONF_NAME], CORE.friendly_name, device_name
+    )
+
+    if not config[CONF_NAME]:
+        _LOGGER.debug(
+            "Entity has empty name, using '%s' as object_id base", base_object_id
+        )
+
+    # Set the object ID
+    add(var.set_object_id(base_object_id))
+    _LOGGER.debug(
+        "Setting object_id '%s' for entity '%s' on platform '%s'",
+        base_object_id,
+        config[CONF_NAME],
+        platform,
+    )
+    add(var.set_disabled_by_default(config[CONF_DISABLED_BY_DEFAULT]))
+    if CONF_INTERNAL in config:
+        add(var.set_internal(config[CONF_INTERNAL]))
+    if CONF_ICON in config:
+        add(var.set_icon(config[CONF_ICON]))
+    if CONF_ENTITY_CATEGORY in config:
+        add(var.set_entity_category(config[CONF_ENTITY_CATEGORY]))
 
 
 def inherit_property_from(property_to_inherit, parent_id_property, transform=None):
@@ -54,3 +165,48 @@ def inherit_property_from(property_to_inherit, parent_id_property, transform=Non
         return config
 
     return inherit_property
+
+
+def entity_duplicate_validator(platform: str) -> Callable[[ConfigType], ConfigType]:
+    """Create a validator function to check for duplicate entity names.
+
+    This validator is meant to be used with schema.add_extra() for entity base schemas.
+
+    Args:
+        platform: The platform name (e.g., "sensor", "binary_sensor")
+
+    Returns:
+        A validator function that checks for duplicate names
+    """
+
+    def validator(config: ConfigType) -> ConfigType:
+        if CONF_NAME not in config:
+            # No name to validate
+            return config
+
+        # Get the entity name and device info
+        entity_name = config[CONF_NAME]
+        device_id = ""  # Empty string for main device
+
+        if CONF_DEVICE_ID in config:
+            device_id_obj = config[CONF_DEVICE_ID]
+            # Use the device ID string directly for uniqueness
+            device_id = device_id_obj.id
+
+        # For duplicate detection, just use the sanitized name
+        name_key = sanitize(snake_case(entity_name))
+
+        # Check for duplicates
+        unique_key = (device_id, platform, name_key)
+        if unique_key in CORE.unique_ids:
+            device_prefix = f" on device '{device_id}'" if device_id else ""
+            raise cv.Invalid(
+                f"Duplicate {platform} entity with name '{entity_name}' found{device_prefix}. "
+                f"Each entity on a device must have a unique name within its platform."
+            )
+
+        # Add to tracking set
+        CORE.unique_ids.add(unique_key)
+        return config
+
+    return validator

esphome/cpp_helpers.py

@@ -1,11 +1,6 @@
 import logging
 
 from esphome.const import (
-    CONF_DISABLED_BY_DEFAULT,
-    CONF_ENTITY_CATEGORY,
-    CONF_ICON,
-    CONF_INTERNAL,
-    CONF_NAME,
     CONF_SAFE_MODE,
     CONF_SETUP_PRIORITY,
     CONF_TYPE_ID,
@@ -16,7 +11,6 @@ from esphome.core import CORE, ID, coroutine
 from esphome.coroutine import FakeAwaitable
 from esphome.cpp_generator import add, get_variable
 from esphome.cpp_types import App
-from esphome.helpers import sanitize, snake_case
 from esphome.types import ConfigFragmentType, ConfigType
 from esphome.util import Registry, RegistryEntry
 
@@ -96,22 +90,6 @@ async def register_parented(var, value):
     add(var.set_parent(paren))
 
 
-async def setup_entity(var, config):
-    """Set up generic properties of an Entity"""
-    add(var.set_name(config[CONF_NAME]))
-    if not config[CONF_NAME]:
-        add(var.set_object_id(sanitize(snake_case(CORE.friendly_name))))
-    else:
-        add(var.set_object_id(sanitize(snake_case(config[CONF_NAME]))))
-    add(var.set_disabled_by_default(config[CONF_DISABLED_BY_DEFAULT]))
-    if CONF_INTERNAL in config:
-        add(var.set_internal(config[CONF_INTERNAL]))
-    if CONF_ICON in config:
-        add(var.set_icon(config[CONF_ICON]))
-    if CONF_ENTITY_CATEGORY in config:
-        add(var.set_entity_category(config[CONF_ENTITY_CATEGORY]))
-
-
 def extract_registry_entry_config(
     registry: Registry,
     full_config: ConfigType,

esphome/dashboard/util/text.py

@@ -1,25 +1,9 @@
 from __future__ import annotations
 
-import unicodedata
+from esphome.helpers import slugify
-
-from esphome.const import ALLOWED_NAME_CHARS
 
 
-def strip_accents(value):
+def friendly_name_slugify(value: str) -> str:
-    return "".join(
+    """Convert a friendly name to a slug with dashes instead of underscores."""
-        c
+    # First use the standard slugify, then convert underscores to dashes
-        for c in unicodedata.normalize("NFD", str(value))
+    return slugify(value).replace("_", "-")
-        if unicodedata.category(c) != "Mn"
-    )
-
-
-def friendly_name_slugify(value):
-    value = (
-        strip_accents(value)
-        .lower()
-        .replace(" ", "-")
-        .replace("_", "-")
-        .replace("--", "-")
-        .strip("-")
-    )
-    return "".join(c for c in value if c in ALLOWED_NAME_CHARS)

esphome/helpers.py

@@ -29,6 +29,53 @@ def ensure_unique_string(preferred_string, current_strings):
     return test_string
 
 
+def fnv1a_32bit_hash(string: str) -> int:
+    """FNV-1a 32-bit hash function.
+
+    Note: This uses 32-bit hash instead of 64-bit for several reasons:
+    1. ESPHome targets 32-bit microcontrollers with limited RAM (often <320KB)
+    2. Using 64-bit hashes would double the RAM usage for storing IDs
+    3. 64-bit operations are slower on 32-bit processors
+
+    While there's a ~50% collision probability at ~77,000 unique IDs,
+    ESPHome validates for collisions at compile time, preventing any
+    runtime issues. In practice, most ESPHome installations only have
+    a handful of area_ids and device_ids (typically <10 areas and <100
+    devices), making collisions virtually impossible.
+    """
+    hash_value = 2166136261
+    for char in string:
+        hash_value ^= ord(char)
+        hash_value = (hash_value * 16777619) & 0xFFFFFFFF
+    return hash_value
+
+
+def strip_accents(value: str) -> str:
+    """Remove accents from a string."""
+    import unicodedata
+
+    return "".join(
+        c
+        for c in unicodedata.normalize("NFD", str(value))
+        if unicodedata.category(c) != "Mn"
+    )
+
+
+def slugify(value: str) -> str:
+    """Convert a string to a valid C++ identifier slug."""
+    from esphome.const import ALLOWED_NAME_CHARS
+
+    value = (
+        strip_accents(value)
+        .lower()
+        .replace(" ", "_")
+        .replace("-", "_")
+        .replace("__", "_")
+        .strip("_")
+    )
+    return "".join(c for c in value if c in ALLOWED_NAME_CHARS)
+
+
 def indent_all_but_first_and_last(text, padding="  "):
     lines = text.splitlines(True)
     if len(lines) <= 2:

tests/components/ade7880/common.yaml

@@ -12,12 +12,12 @@ sensor:
     frequency: 60Hz
     phase_a:
       name: Channel A
-      voltage: Voltage
+      voltage: Channel A Voltage
-      current: Current
+      current: Channel A Current
-      active_power: Active Power
+      active_power: Channel A Active Power
-      power_factor: Power Factor
+      power_factor: Channel A Power Factor
-      forward_active_energy: Forward Active Energy
+      forward_active_energy: Channel A Forward Active Energy
-      reverse_active_energy: Reverse Active Energy
+      reverse_active_energy: Channel A Reverse Active Energy
       calibration:
         current_gain: 3116628
         voltage_gain: -757178
@@ -25,12 +25,12 @@ sensor:
         phase_angle: 188
     phase_b:
       name: Channel B
-      voltage: Voltage
+      voltage: Channel B Voltage
-      current: Current
+      current: Channel B Current
-      active_power: Active Power
+      active_power: Channel B Active Power
-      power_factor: Power Factor
+      power_factor: Channel B Power Factor
-      forward_active_energy: Forward Active Energy
+      forward_active_energy: Channel B Forward Active Energy
-      reverse_active_energy: Reverse Active Energy
+      reverse_active_energy: Channel B Reverse Active Energy
       calibration:
         current_gain: 3133655
         voltage_gain: -755235
@@ -38,12 +38,12 @@ sensor:
         phase_angle: 188
     phase_c:
       name: Channel C
-      voltage: Voltage
+      voltage: Channel C Voltage
-      current: Current
+      current: Channel C Current
-      active_power: Active Power
+      active_power: Channel C Active Power
-      power_factor: Power Factor
+      power_factor: Channel C Power Factor
-      forward_active_energy: Forward Active Energy
+      forward_active_energy: Channel C Forward Active Energy
-      reverse_active_energy: Reverse Active Energy
+      reverse_active_energy: Channel C Reverse Active Energy
       calibration:
         current_gain: 3111158
         voltage_gain: -743813
@@ -51,6 +51,6 @@ sensor:
         phase_angle: 180
     neutral:
       name: Neutral
-      current: Current
+      current: Neutral Current
       calibration:
         current_gain: 3189

tests/components/alarm_control_panel/common.yaml

@@ -26,7 +26,7 @@ alarm_control_panel:
             ESP_LOGD("TEST", "State change %s", LOG_STR_ARG(alarm_control_panel_state_to_string(id(alarmcontrolpanel1)->get_state())));
   - platform: template
     id: alarmcontrolpanel2
-    name: Alarm Panel
+    name: Alarm Panel 2
     codes:
       - "1234"
     requires_code_to_arm: true

tests/components/binary_sensor_map/common.yaml

@@ -26,7 +26,7 @@ binary_sensor:
 
 sensor:
   - platform: binary_sensor_map
-    name: Binary Sensor Map
+    name: Binary Sensor Map Group
     type: group
     channels:
       - binary_sensor: bin1
@@ -36,7 +36,7 @@ sensor:
       - binary_sensor: bin3
         value: 100.0
   - platform: binary_sensor_map
-    name: Binary Sensor Map
+    name: Binary Sensor Map Sum
     type: sum
     channels:
       - binary_sensor: bin1
@@ -46,7 +46,7 @@ sensor:
       - binary_sensor: bin3
         value: 100.0
   - platform: binary_sensor_map
-    name: Binary Sensor Map
+    name: Binary Sensor Map Bayesian
     type: bayesian
     prior: 0.4
     observations:

tests/components/dallas_temp/common.yaml

@@ -5,7 +5,7 @@ one_wire:
 sensor:
   - platform: dallas_temp
     address: 0x1C0000031EDD2A28
-    name: Dallas Temperature
+    name: Dallas Temperature 1
     resolution: 9
   - platform: dallas_temp
-    name: Dallas Temperature
+    name: Dallas Temperature 2

tests/components/esphome/common.yaml

@@ -2,7 +2,9 @@ esphome:
   debug_scheduler: true
   platformio_options:
     board_build.flash_mode: dio
-  area: testing
+  area:
+    id: testing_area
+    name: Testing Area
   on_boot:
     logger.log: on_boot
   on_shutdown:
@@ -17,4 +19,20 @@ esphome:
     version: "1.1"
     on_update:
       logger.log: on_update
+  areas:
+    - id: another_area
+      name: Another area
+  devices:
+    - id: other_device
+      name: Another device
+      area_id: another_area
+    - id: test_device
+      name: Test device in main area
+      area_id: testing_area  # Reference the main area (not in areas)
+    - id: no_area_device
+      name: Device without area  # This device has no area_id
 
+binary_sensor:
+  - platform: template
+    name: Other device sensor
+    device_id: other_device

tests/components/heatpumpir/common.yaml

@@ -7,20 +7,20 @@ climate:
     protocol: mitsubishi_heavy_zm
     horizontal_default: left
     vertical_default: up
-    name: HeatpumpIR Climate
+    name: HeatpumpIR Climate Mitsubishi
     min_temperature: 18
     max_temperature: 30
   - platform: heatpumpir
     protocol: daikin
     horizontal_default: mleft
     vertical_default: mup
-    name: HeatpumpIR Climate
+    name: HeatpumpIR Climate Daikin
     min_temperature: 18
     max_temperature: 30
   - platform: heatpumpir
     protocol: panasonic_altdke
     horizontal_default: mright
     vertical_default: mdown
-    name: HeatpumpIR Climate
+    name: HeatpumpIR Climate Panasonic
     min_temperature: 18
     max_temperature: 30

tests/components/light/common.yaml

@@ -114,7 +114,7 @@ light:
     warm_white_color_temperature: 500 mireds
   - platform: rgb
     id: test_rgb_light_initial_state
-    name: RGB Light
+    name: RGB Light Initial State
     red: test_ledc_1
     green: test_ledc_2
     blue: test_ledc_3

tests/components/ltr390/common.yaml

@@ -6,13 +6,13 @@ i2c:
 sensor:
   - platform: ltr390
     uv:
-      name: LTR390 UV
+      name: LTR390 UV 1
     uv_index:
-      name: LTR390 UVI
+      name: LTR390 UVI 1
     light:
-      name: LTR390 Light
+      name: LTR390 Light 1
     ambient_light:
-      name: LTR390 ALS
+      name: LTR390 ALS 1
     gain: X3
     resolution: 18
     window_correction_factor: 1.0
@@ -20,13 +20,13 @@ sensor:
     update_interval: 60s
   - platform: ltr390
     uv:
-      name: LTR390 UV
+      name: LTR390 UV 2
     uv_index:
-      name: LTR390 UVI
+      name: LTR390 UVI 2
     light:
-      name: LTR390 Light
+      name: LTR390 Light 2
     ambient_light:
-      name: LTR390 ALS
+      name: LTR390 ALS 2
     gain:
       ambient_light: X9
       uv: X3

tests/components/lvgl/common.yaml

@@ -24,33 +24,33 @@ sensor:
     widget: lv_arc
   - platform: lvgl
     widget: slider_id
-    name: LVGL Slider
+    name: LVGL Slider Sensor
   - platform: lvgl
     widget: bar_id
     id: lvgl_bar_sensor
-    name: LVGL Bar
+    name: LVGL Bar Sensor
   - platform: lvgl
     widget: spinbox_id
-    name: LVGL Spinbox
+    name: LVGL Spinbox Sensor
 
 number:
   - platform: lvgl
     widget: slider_id
-    name: LVGL Slider
+    name: LVGL Slider Number
     update_on_release: true
     restore_value: true
   - platform: lvgl
     widget: lv_arc
     id: lvgl_arc_number
-    name: LVGL Arc
+    name: LVGL Arc Number
   - platform: lvgl
     widget: bar_id
     id: lvgl_bar_number
-    name: LVGL Bar
+    name: LVGL Bar Number
   - platform: lvgl
     widget: spinbox_id
     id: lvgl_spinbox_number
-    name: LVGL Spinbox
+    name: LVGL Spinbox Number
 
 light:
   - platform: lvgl

tests/components/opentherm/common.yaml

@@ -170,4 +170,4 @@ switch:
     otc_active:
       name: "Boiler Outside temperature compensation active"
     ch2_active:
-      name: "Boiler Central Heating 2 active"
+      name: "Boiler Central Heating 2 active status"

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

@@ -5,7 +5,7 @@ packages:
   - !include package.yaml
   - github://esphome/esphome/tests/components/template/common.yaml@dev
   - url: https://github.com/esphome/esphome
-    file: tests/components/binary_sensor_map/common.yaml
+    file: tests/components/absolute_humidity/common.yaml
     ref: dev
     refresh: 1d
 

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

@@ -7,7 +7,7 @@ packages:
   shorthand: github://esphome/esphome/tests/components/template/common.yaml@dev
   github:
     url: https://github.com/esphome/esphome
-    file: tests/components/binary_sensor_map/common.yaml
+    file: tests/components/absolute_humidity/common.yaml
     ref: dev
     refresh: 1d
 

tests/components/remote_transmitter/common-buttons.yaml

@@ -115,7 +115,7 @@ button:
         address: 0x00
         command: 0x0B
   - platform: template
-    name: RC5
+    name: RC5 Raw
     on_press:
       remote_transmitter.transmit_raw:
         code: [1000, -1000]

tests/dummy_main.cpp

@@ -12,7 +12,7 @@
 using namespace esphome;
 
 void setup() {
-  App.pre_setup("livingroom", "LivingRoom", "LivingRoomArea", "comment", __DATE__ ", " __TIME__, false);
+  App.pre_setup("livingroom", "LivingRoom", "comment", __DATE__ ", " __TIME__, false);
   auto *log = new logger::Logger(115200, 512);  // NOLINT
   log->pre_setup();
   log->set_uart_selection(logger::UART_SELECTION_UART0);

tests/integration/conftest.py

@@ -203,6 +203,7 @@ async def compile_esphome(
         loop = asyncio.get_running_loop()
 
         def _read_config_and_get_binary():
+            CORE.reset()  # Reset CORE state between test runs
             CORE.config_path = str(config_path)
             config = esphome.config.read_config(
                 {"command": "compile", "config": str(config_path)}

tests/integration/fixtures/areas_and_devices.yaml

@@ -0,0 +1,57 @@
+esphome:
+  name: areas-devices-test
+  # Define top-level area
+  area:
+    id: living_room_area
+    name: Living Room
+  # Define additional areas
+  areas:
+    - id: bedroom_area
+      name: Bedroom
+    - id: kitchen_area
+      name: Kitchen
+  # Define devices with area assignments
+  devices:
+    - id: light_controller_device
+      name: Light Controller
+      area_id: living_room_area  # Uses top-level area
+    - id: temp_sensor_device
+      name: Temperature Sensor
+      area_id: bedroom_area
+    - id: motion_detector_device
+      name: Motion Detector
+      area_id: living_room_area  # Reuses top-level area
+    - id: smart_switch_device
+      name: Smart Switch
+      area_id: kitchen_area
+
+host:
+api:
+logger:
+
+# Sensors assigned to different devices
+sensor:
+  - platform: template
+    name: Light Controller Sensor
+    device_id: light_controller_device
+    lambda: return 1.0;
+    update_interval: 0.1s
+
+  - platform: template
+    name: Temperature Sensor Reading
+    device_id: temp_sensor_device
+    lambda: return 2.0;
+    update_interval: 0.1s
+
+  - platform: template
+    name: Motion Detector Status
+    device_id: motion_detector_device
+    lambda: return 3.0;
+    update_interval: 0.1s
+
+  - platform: template
+    name: Smart Switch Power
+    device_id: smart_switch_device
+    lambda: return 4.0;
+    update_interval: 0.1s
+

tests/integration/fixtures/duplicate_entities_on_different_devices.yaml

@@ -0,0 +1,154 @@
+esphome:
+  name: duplicate-entities-test
+  # Define devices to test multi-device duplicate handling
+  devices:
+    - id: controller_1
+      name: Controller 1
+    - id: controller_2
+      name: Controller 2
+    - id: controller_3
+      name: Controller 3
+
+host:
+api:  # Port will be automatically injected
+logger:
+
+# Test that duplicate entity names are allowed on different devices
+
+# Scenario 1: Same sensor name on different devices (allowed)
+sensor:
+  - platform: template
+    name: Temperature
+    device_id: controller_1
+    lambda: return 21.0;
+    update_interval: 0.1s
+
+  - platform: template
+    name: Temperature
+    device_id: controller_2
+    lambda: return 22.0;
+    update_interval: 0.1s
+
+  - platform: template
+    name: Temperature
+    device_id: controller_3
+    lambda: return 23.0;
+    update_interval: 0.1s
+
+  # Main device sensor (no device_id)
+  - platform: template
+    name: Temperature
+    lambda: return 20.0;
+    update_interval: 0.1s
+
+  # Different sensor with unique name
+  - platform: template
+    name: Humidity
+    lambda: return 60.0;
+    update_interval: 0.1s
+
+# Scenario 2: Same binary sensor name on different devices (allowed)
+binary_sensor:
+  - platform: template
+    name: Status
+    device_id: controller_1
+    lambda: return true;
+
+  - platform: template
+    name: Status
+    device_id: controller_2
+    lambda: return false;
+
+  - platform: template
+    name: Status
+    lambda: return true;  # Main device
+
+  # Different platform can have same name as sensor
+  - platform: template
+    name: Temperature
+    lambda: return true;
+
+# Scenario 3: Same text sensor name on different devices
+text_sensor:
+  - platform: template
+    name: Device Info
+    device_id: controller_1
+    lambda: return {"Controller 1 Active"};
+    update_interval: 0.1s
+
+  - platform: template
+    name: Device Info
+    device_id: controller_2
+    lambda: return {"Controller 2 Active"};
+    update_interval: 0.1s
+
+  - platform: template
+    name: Device Info
+    lambda: return {"Main Device Active"};
+    update_interval: 0.1s
+
+# Scenario 4: Same switch name on different devices
+switch:
+  - platform: template
+    name: Power
+    device_id: controller_1
+    lambda: return false;
+    turn_on_action: []
+    turn_off_action: []
+
+  - platform: template
+    name: Power
+    device_id: controller_2
+    lambda: return true;
+    turn_on_action: []
+    turn_off_action: []
+
+  - platform: template
+    name: Power
+    device_id: controller_3
+    lambda: return false;
+    turn_on_action: []
+    turn_off_action: []
+
+  # Unique switch on main device
+  - platform: template
+    name: Main Power
+    lambda: return true;
+    turn_on_action: []
+    turn_off_action: []
+
+# Scenario 5: Empty names on different devices (should use device name)
+button:
+  - platform: template
+    name: ""
+    device_id: controller_1
+    on_press: []
+
+  - platform: template
+    name: ""
+    device_id: controller_2
+    on_press: []
+
+  - platform: template
+    name: ""
+    on_press: []  # Main device
+
+# Scenario 6: Special characters in names
+number:
+  - platform: template
+    name: "Temperature Setpoint!"
+    device_id: controller_1
+    min_value: 10.0
+    max_value: 30.0
+    step: 0.1
+    lambda: return 21.0;
+    set_action: []
+
+  - platform: template
+    name: "Temperature Setpoint!"
+    device_id: controller_2
+    min_value: 10.0
+    max_value: 30.0
+    step: 0.1
+    lambda: return 22.0;
+    set_action: []

tests/integration/fixtures/legacy_area.yaml

@@ -0,0 +1,15 @@
+esphome:
+  name: legacy-area-test
+  # Using legacy string-based area configuration
+  area: Master Bedroom
+
+host:
+api:
+logger:
+
+# Simple sensor to ensure the device compiles and runs
+sensor:
+  - platform: template
+    name: Test Sensor
+    lambda: return 42.0;
+    update_interval: 1s

tests/integration/test_areas_and_devices.py

@@ -0,0 +1,121 @@
+"""Integration test for areas and devices feature."""
+
+from __future__ import annotations
+
+import asyncio
+
+from aioesphomeapi import EntityState
+import pytest
+
+from .types import APIClientConnectedFactory, RunCompiledFunction
+
+
+@pytest.mark.asyncio
+async def test_areas_and_devices(
+    yaml_config: str,
+    run_compiled: RunCompiledFunction,
+    api_client_connected: APIClientConnectedFactory,
+) -> None:
+    """Test areas and devices configuration with entity mapping."""
+    async with run_compiled(yaml_config), api_client_connected() as client:
+        # Get device info which includes areas and devices
+        device_info = await client.device_info()
+        assert device_info is not None
+
+        # Verify areas are reported
+        areas = device_info.areas
+        assert len(areas) >= 2, f"Expected at least 2 areas, got {len(areas)}"
+
+        # Find our specific areas
+        main_area = next((a for a in areas if a.name == "Living Room"), None)
+        bedroom_area = next((a for a in areas if a.name == "Bedroom"), None)
+        kitchen_area = next((a for a in areas if a.name == "Kitchen"), None)
+
+        assert main_area is not None, "Living Room area not found"
+        assert bedroom_area is not None, "Bedroom area not found"
+        assert kitchen_area is not None, "Kitchen area not found"
+
+        # Verify devices are reported
+        devices = device_info.devices
+        assert len(devices) >= 4, f"Expected at least 4 devices, got {len(devices)}"
+
+        # Find our specific devices
+        light_controller = next(
+            (d for d in devices if d.name == "Light Controller"), None
+        )
+        temp_sensor = next((d for d in devices if d.name == "Temperature Sensor"), None)
+        motion_detector = next(
+            (d for d in devices if d.name == "Motion Detector"), None
+        )
+        smart_switch = next((d for d in devices if d.name == "Smart Switch"), None)
+
+        assert light_controller is not None, "Light Controller device not found"
+        assert temp_sensor is not None, "Temperature Sensor device not found"
+        assert motion_detector is not None, "Motion Detector device not found"
+        assert smart_switch is not None, "Smart Switch device not found"
+
+        # Verify device area assignments
+        assert light_controller.area_id == main_area.area_id, (
+            "Light Controller should be in Living Room"
+        )
+        assert temp_sensor.area_id == bedroom_area.area_id, (
+            "Temperature Sensor should be in Bedroom"
+        )
+        assert motion_detector.area_id == main_area.area_id, (
+            "Motion Detector should be in Living Room"
+        )
+        assert smart_switch.area_id == kitchen_area.area_id, (
+            "Smart Switch should be in Kitchen"
+        )
+
+        # Verify suggested_area is set to the top-level area name
+        assert device_info.suggested_area == "Living Room", (
+            f"Expected suggested_area to be 'Living Room', got '{device_info.suggested_area}'"
+        )
+
+        # Get entity list to verify device_id mapping
+        entities = await client.list_entities_services()
+
+        # Collect sensor entities
+        sensor_entities = [e for e in entities[0] if hasattr(e, "device_id")]
+        assert len(sensor_entities) >= 4, (
+            f"Expected at least 4 sensor entities, got {len(sensor_entities)}"
+        )
+
+        # Subscribe to states to get sensor values
+        loop = asyncio.get_running_loop()
+        states: dict[int, EntityState] = {}
+        states_future: asyncio.Future[bool] = loop.create_future()
+
+        def on_state(state: EntityState) -> None:
+            states[state.key] = state
+            # Check if we have all expected sensor states
+            if len(states) >= 4 and not states_future.done():
+                states_future.set_result(True)
+
+        client.subscribe_states(on_state)
+
+        # Wait for sensor states
+        try:
+            await asyncio.wait_for(states_future, timeout=10.0)
+        except asyncio.TimeoutError:
+            pytest.fail(
+                f"Did not receive all sensor states within 10 seconds. "
+                f"Received {len(states)} states"
+            )
+
+        # Verify we have sensor entities with proper device_id assignments
+        device_id_mapping = {
+            "Light Controller Sensor": light_controller.device_id,
+            "Temperature Sensor Reading": temp_sensor.device_id,
+            "Motion Detector Status": motion_detector.device_id,
+            "Smart Switch Power": smart_switch.device_id,
+        }
+
+        for entity in sensor_entities:
+            if entity.name in device_id_mapping:
+                expected_device_id = device_id_mapping[entity.name]
+                assert entity.device_id == expected_device_id, (
+                    f"{entity.name} has device_id {entity.device_id}, "
+                    f"expected {expected_device_id}"
+                )

tests/integration/test_duplicate_entities.py

@@ -0,0 +1,184 @@
+"""Integration test for duplicate entity handling with new validation."""
+
+from __future__ import annotations
+
+import asyncio
+
+from aioesphomeapi import EntityInfo
+import pytest
+
+from .types import APIClientConnectedFactory, RunCompiledFunction
+
+
+@pytest.mark.asyncio
+async def test_duplicate_entities_on_different_devices(
+    yaml_config: str,
+    run_compiled: RunCompiledFunction,
+    api_client_connected: APIClientConnectedFactory,
+) -> None:
+    """Test that duplicate entity names are allowed on different devices."""
+    async with run_compiled(yaml_config), api_client_connected() as client:
+        # Get device info
+        device_info = await client.device_info()
+        assert device_info is not None
+
+        # Get devices
+        devices = device_info.devices
+        assert len(devices) >= 3, f"Expected at least 3 devices, got {len(devices)}"
+
+        # Find our test devices
+        controller_1 = next((d for d in devices if d.name == "Controller 1"), None)
+        controller_2 = next((d for d in devices if d.name == "Controller 2"), None)
+        controller_3 = next((d for d in devices if d.name == "Controller 3"), None)
+
+        assert controller_1 is not None, "Controller 1 device not found"
+        assert controller_2 is not None, "Controller 2 device not found"
+        assert controller_3 is not None, "Controller 3 device not found"
+
+        # Get entity list
+        entities = await client.list_entities_services()
+        all_entities: list[EntityInfo] = []
+        for entity_list in entities[0]:
+            all_entities.append(entity_list)
+
+        # Group entities by type for easier testing
+        sensors = [e for e in all_entities if e.__class__.__name__ == "SensorInfo"]
+        binary_sensors = [
+            e for e in all_entities if e.__class__.__name__ == "BinarySensorInfo"
+        ]
+        text_sensors = [
+            e for e in all_entities if e.__class__.__name__ == "TextSensorInfo"
+        ]
+        switches = [e for e in all_entities if e.__class__.__name__ == "SwitchInfo"]
+        buttons = [e for e in all_entities if e.__class__.__name__ == "ButtonInfo"]
+        numbers = [e for e in all_entities if e.__class__.__name__ == "NumberInfo"]
+
+        # Scenario 1: Check sensors with same "Temperature" name on different devices
+        temp_sensors = [s for s in sensors if s.name == "Temperature"]
+        assert len(temp_sensors) == 4, (
+            f"Expected exactly 4 temperature sensors, got {len(temp_sensors)}"
+        )
+
+        # Verify each sensor is on a different device
+        temp_device_ids = set()
+        temp_object_ids = set()
+
+        for sensor in temp_sensors:
+            temp_device_ids.add(sensor.device_id)
+            temp_object_ids.add(sensor.object_id)
+
+            # All should have object_id "temperature" (no suffix)
+            assert sensor.object_id == "temperature", (
+                f"Expected object_id 'temperature', got '{sensor.object_id}'"
+            )
+
+        # Should have 4 different device IDs (including None for main device)
+        assert len(temp_device_ids) == 4, (
+            f"Temperature sensors should be on different devices, got {temp_device_ids}"
+        )
+
+        # Scenario 2: Check binary sensors "Status" on different devices
+        status_binary = [b for b in binary_sensors if b.name == "Status"]
+        assert len(status_binary) == 3, (
+            f"Expected exactly 3 status binary sensors, got {len(status_binary)}"
+        )
+
+        # All should have object_id "status"
+        for binary in status_binary:
+            assert binary.object_id == "status", (
+                f"Expected object_id 'status', got '{binary.object_id}'"
+            )
+
+        # Scenario 3: Check that sensor and binary_sensor can have same name
+        temp_binary = [b for b in binary_sensors if b.name == "Temperature"]
+        assert len(temp_binary) == 1, (
+            f"Expected exactly 1 temperature binary sensor, got {len(temp_binary)}"
+        )
+        assert temp_binary[0].object_id == "temperature"
+
+        # Scenario 4: Check text sensors "Device Info" on different devices
+        info_text = [t for t in text_sensors if t.name == "Device Info"]
+        assert len(info_text) == 3, (
+            f"Expected exactly 3 device info text sensors, got {len(info_text)}"
+        )
+
+        # All should have object_id "device_info"
+        for text in info_text:
+            assert text.object_id == "device_info", (
+                f"Expected object_id 'device_info', got '{text.object_id}'"
+            )
+
+        # Scenario 5: Check switches "Power" on different devices
+        power_switches = [s for s in switches if s.name == "Power"]
+        assert len(power_switches) == 3, (
+            f"Expected exactly 3 power switches, got {len(power_switches)}"
+        )
+
+        # All should have object_id "power"
+        for switch in power_switches:
+            assert switch.object_id == "power", (
+                f"Expected object_id 'power', got '{switch.object_id}'"
+            )
+
+        # Scenario 6: Check empty name buttons (should use device name)
+        empty_buttons = [b for b in buttons if b.name == ""]
+        assert len(empty_buttons) == 3, (
+            f"Expected exactly 3 empty name buttons, got {len(empty_buttons)}"
+        )
+
+        # Group by device
+        c1_buttons = [b for b in empty_buttons if b.device_id == controller_1.device_id]
+        c2_buttons = [b for b in empty_buttons if b.device_id == controller_2.device_id]
+
+        # For main device, device_id is 0
+        main_buttons = [b for b in empty_buttons if b.device_id == 0]
+
+        # Check object IDs for empty name entities
+        assert len(c1_buttons) == 1 and c1_buttons[0].object_id == "controller_1"
+        assert len(c2_buttons) == 1 and c2_buttons[0].object_id == "controller_2"
+        assert (
+            len(main_buttons) == 1
+            and main_buttons[0].object_id == "duplicate-entities-test"
+        )
+
+        # Scenario 7: Check special characters in number names
+        temp_numbers = [n for n in numbers if n.name == "Temperature Setpoint!"]
+        assert len(temp_numbers) == 2, (
+            f"Expected exactly 2 temperature setpoint numbers, got {len(temp_numbers)}"
+        )
+
+        # Special characters should be sanitized to _ in object_id
+        for number in temp_numbers:
+            assert number.object_id == "temperature_setpoint_", (
+                f"Expected object_id 'temperature_setpoint_', got '{number.object_id}'"
+            )
+
+        # Verify we can get states for all entities (ensures they're functional)
+        loop = asyncio.get_running_loop()
+        states_future: asyncio.Future[None] = loop.create_future()
+        state_count = 0
+        expected_count = (
+            len(sensors)
+            + len(binary_sensors)
+            + len(text_sensors)
+            + len(switches)
+            + len(buttons)
+            + len(numbers)
+        )
+
+        def on_state(state) -> None:
+            nonlocal state_count
+            state_count += 1
+            if state_count >= expected_count and not states_future.done():
+                states_future.set_result(None)
+
+        client.subscribe_states(on_state)
+
+        # Wait for all entity states
+        try:
+            await asyncio.wait_for(states_future, timeout=10.0)
+        except asyncio.TimeoutError:
+            pytest.fail(
+                f"Did not receive all entity states within 10 seconds. "
+                f"Expected {expected_count}, received {state_count}"
+            )

tests/integration/test_legacy_area.py

@@ -0,0 +1,41 @@
+"""Integration test for legacy string-based area configuration."""
+
+from __future__ import annotations
+
+import pytest
+
+from .types import APIClientConnectedFactory, RunCompiledFunction
+
+
+@pytest.mark.asyncio
+async def test_legacy_area(
+    yaml_config: str,
+    run_compiled: RunCompiledFunction,
+    api_client_connected: APIClientConnectedFactory,
+) -> None:
+    """Test legacy string-based area configuration."""
+    async with run_compiled(yaml_config), api_client_connected() as client:
+        # Get device info which includes areas
+        device_info = await client.device_info()
+        assert device_info is not None
+
+        # Verify the area is reported (should be converted to structured format)
+        areas = device_info.areas
+        assert len(areas) == 1, f"Expected exactly 1 area, got {len(areas)}"
+
+        # Find the area - should be slugified from "Master Bedroom"
+        area = areas[0]
+        assert area.name == "Master Bedroom", (
+            f"Expected area name 'Master Bedroom', got '{area.name}'"
+        )
+
+        # Verify area.id is set (it should be a hash)
+        assert area.area_id > 0, "Area ID should be a positive hash value"
+
+        # The suggested_area field should be set for backward compatibility
+        assert device_info.suggested_area == "Master Bedroom", (
+            f"Expected suggested_area to be 'Master Bedroom', got '{device_info.suggested_area}'"
+        )
+
+        # Verify deprecated warning would have been logged during compilation
+        # (We can't check logs directly in integration tests, but the code should work)

tests/unit_tests/conftest.py

@@ -14,6 +14,8 @@ import sys
 
 import pytest
 
+from esphome.core import CORE
+
 here = Path(__file__).parent
 
 # Configure location of package root
@@ -21,6 +23,13 @@ package_root = here.parent.parent
 sys.path.insert(0, package_root.as_posix())
 
 
+@pytest.fixture(autouse=True)
+def reset_core():
+    """Reset CORE after each test."""
+    yield
+    CORE.reset()
+
+
 @pytest.fixture
 def fixture_path() -> Path:
     """

tests/unit_tests/core/common.py

@@ -0,0 +1,33 @@
+"""Common test utilities for core unit tests."""
+
+from collections.abc import Callable
+from pathlib import Path
+from unittest.mock import patch
+
+from esphome import config, yaml_util
+from esphome.config import Config
+from esphome.core import CORE
+
+
+def load_config_from_yaml(
+    yaml_file: Callable[[str], str], yaml_content: str
+) -> Config | None:
+    """Load configuration from YAML content."""
+    yaml_path = yaml_file(yaml_content)
+    parsed_yaml = yaml_util.load_yaml(yaml_path)
+
+    # Mock yaml_util.load_yaml to return our parsed content
+    with (
+        patch.object(yaml_util, "load_yaml", return_value=parsed_yaml),
+        patch.object(CORE, "config_path", yaml_path),
+    ):
+        return config.read_config({})
+
+
+def load_config_from_fixture(
+    yaml_file: Callable[[str], str], fixture_name: str, fixtures_dir: Path
+) -> Config | None:
+    """Load configuration from a fixture file."""
+    fixture_path = fixtures_dir / fixture_name
+    yaml_content = fixture_path.read_text()
+    return load_config_from_yaml(yaml_file, yaml_content)

tests/unit_tests/core/conftest.py

@@ -0,0 +1,18 @@
+"""Shared fixtures for core unit tests."""
+
+from collections.abc import Callable
+from pathlib import Path
+
+import pytest
+
+
+@pytest.fixture
+def yaml_file(tmp_path: Path) -> Callable[[str], str]:
+    """Create a temporary YAML file for testing."""
+
+    def _yaml_file(content: str) -> str:
+        yaml_path = tmp_path / "test.yaml"
+        yaml_path.write_text(content)
+        return str(yaml_path)
+
+    return _yaml_file

tests/unit_tests/core/test_config.py

@@ -0,0 +1,225 @@
+"""Unit tests for core config functionality including areas and devices."""
+
+from collections.abc import Callable
+from pathlib import Path
+from typing import Any
+
+import pytest
+
+from esphome import config_validation as cv, core
+from esphome.const import CONF_AREA, CONF_AREAS, CONF_DEVICES
+from esphome.core.config import Area, validate_area_config
+
+from .common import load_config_from_fixture
+
+FIXTURES_DIR = Path(__file__).parent.parent / "fixtures" / "core" / "config"
+
+
+def test_validate_area_config_with_string() -> None:
+    """Test that string area config is converted to structured format."""
+    result = validate_area_config("Living Room")
+
+    assert isinstance(result, dict)
+    assert "id" in result
+    assert "name" in result
+    assert result["name"] == "Living Room"
+    assert isinstance(result["id"], core.ID)
+    assert result["id"].is_declaration
+    assert not result["id"].is_manual
+
+
+def test_validate_area_config_with_dict() -> None:
+    """Test that structured area config passes through unchanged."""
+    area_id = cv.declare_id(Area)("test_area")
+    input_config: dict[str, Any] = {
+        "id": area_id,
+        "name": "Test Area",
+    }
+
+    result = validate_area_config(input_config)
+
+    assert result == input_config
+    assert result["id"] == area_id
+    assert result["name"] == "Test Area"
+
+
+def test_device_with_valid_area_id(yaml_file: Callable[[str], str]) -> None:
+    """Test that device with valid area_id works correctly."""
+    result = load_config_from_fixture(yaml_file, "valid_area_device.yaml", FIXTURES_DIR)
+    assert result is not None
+
+    esphome_config = result["esphome"]
+
+    # Verify areas were parsed correctly
+    assert CONF_AREAS in esphome_config
+    areas = esphome_config[CONF_AREAS]
+    assert len(areas) == 1
+    assert areas[0]["id"].id == "bedroom_area"
+    assert areas[0]["name"] == "Bedroom"
+
+    # Verify devices were parsed correctly
+    assert CONF_DEVICES in esphome_config
+    devices = esphome_config[CONF_DEVICES]
+    assert len(devices) == 1
+    assert devices[0]["id"].id == "test_device"
+    assert devices[0]["name"] == "Test Device"
+    assert devices[0]["area_id"].id == "bedroom_area"
+
+
+def test_multiple_areas_and_devices(yaml_file: Callable[[str], str]) -> None:
+    """Test multiple areas and devices configuration."""
+    result = load_config_from_fixture(
+        yaml_file, "multiple_areas_devices.yaml", FIXTURES_DIR
+    )
+    assert result is not None
+
+    esphome_config = result["esphome"]
+
+    # Verify main area
+    assert CONF_AREA in esphome_config
+    main_area = esphome_config[CONF_AREA]
+    assert main_area["id"].id == "main_area"
+    assert main_area["name"] == "Main Area"
+
+    # Verify additional areas
+    assert CONF_AREAS in esphome_config
+    areas = esphome_config[CONF_AREAS]
+    assert len(areas) == 2
+    area_ids = {area["id"].id for area in areas}
+    assert area_ids == {"area1", "area2"}
+
+    # Verify devices
+    assert CONF_DEVICES in esphome_config
+    devices = esphome_config[CONF_DEVICES]
+    assert len(devices) == 3
+
+    # Check device-area associations
+    device_area_map = {dev["id"].id: dev["area_id"].id for dev in devices}
+    assert device_area_map == {
+        "device1": "main_area",
+        "device2": "area1",
+        "device3": "area2",
+    }
+
+
+def test_legacy_string_area(
+    yaml_file: Callable[[str], str], caplog: pytest.LogCaptureFixture
+) -> None:
+    """Test legacy string area configuration with deprecation warning."""
+    result = load_config_from_fixture(
+        yaml_file, "legacy_string_area.yaml", FIXTURES_DIR
+    )
+    assert result is not None
+
+    esphome_config = result["esphome"]
+
+    # Verify the string was converted to structured format
+    assert CONF_AREA in esphome_config
+    area = esphome_config[CONF_AREA]
+    assert isinstance(area, dict)
+    assert area["name"] == "Living Room"
+    assert isinstance(area["id"], core.ID)
+    assert area["id"].is_declaration
+    assert not area["id"].is_manual
+
+
+def test_area_id_collision(
+    yaml_file: Callable[[str], str], capsys: pytest.CaptureFixture[str]
+) -> None:
+    """Test that duplicate area IDs are detected."""
+    result = load_config_from_fixture(yaml_file, "area_id_collision.yaml", FIXTURES_DIR)
+    assert result is None
+
+    # Check for the specific error message in stdout
+    captured = capsys.readouterr()
+    # Exact duplicates are now caught by IDPassValidationStep
+    assert "ID duplicate_id redefined! Check esphome->area->id." in captured.out
+
+
+def test_device_without_area(yaml_file: Callable[[str], str]) -> None:
+    """Test that devices without area_id work correctly."""
+    result = load_config_from_fixture(
+        yaml_file, "device_without_area.yaml", FIXTURES_DIR
+    )
+    assert result is not None
+
+    esphome_config = result["esphome"]
+
+    # Verify device was parsed
+    assert CONF_DEVICES in esphome_config
+    devices = esphome_config[CONF_DEVICES]
+    assert len(devices) == 1
+
+    device = devices[0]
+    assert device["id"].id == "test_device"
+    assert device["name"] == "Test Device"
+
+    # Verify no area_id is present
+    assert "area_id" not in device
+
+
+def test_device_with_invalid_area_id(
+    yaml_file: Callable[[str], str], capsys: pytest.CaptureFixture[str]
+) -> None:
+    """Test that device with non-existent area_id fails validation."""
+    result = load_config_from_fixture(
+        yaml_file, "device_invalid_area.yaml", FIXTURES_DIR
+    )
+    assert result is None
+
+    # Check for the specific error message in stdout
+    captured = capsys.readouterr()
+    assert (
+        "Couldn't find ID 'nonexistent_area'. Please check you have defined an ID with that name in your configuration."
+        in captured.out
+    )
+
+
+def test_device_id_hash_collision(
+    yaml_file: Callable[[str], str], capsys: pytest.CaptureFixture[str]
+) -> None:
+    """Test that device IDs with hash collisions are detected."""
+    result = load_config_from_fixture(
+        yaml_file, "device_id_collision.yaml", FIXTURES_DIR
+    )
+    assert result is None
+
+    # Check for the specific error message about hash collision
+    captured = capsys.readouterr()
+    # The error message shows the ID that collides and includes the hash value
+    assert (
+        "Device ID 'd6ka' with hash 3082558663 collides with existing device ID 'test_2258'"
+        in captured.out
+    )
+
+
+def test_area_id_hash_collision(
+    yaml_file: Callable[[str], str], capsys: pytest.CaptureFixture[str]
+) -> None:
+    """Test that area IDs with hash collisions are detected."""
+    result = load_config_from_fixture(
+        yaml_file, "area_id_hash_collision.yaml", FIXTURES_DIR
+    )
+    assert result is None
+
+    # Check for the specific error message about hash collision
+    captured = capsys.readouterr()
+    # The error message shows the ID that collides and includes the hash value
+    assert (
+        "Area ID 'd6ka' with hash 3082558663 collides with existing area ID 'test_2258'"
+        in captured.out
+    )
+
+
+def test_device_duplicate_id(
+    yaml_file: Callable[[str], str], capsys: pytest.CaptureFixture[str]
+) -> None:
+    """Test that duplicate device IDs are detected by IDPassValidationStep."""
+    result = load_config_from_fixture(
+        yaml_file, "device_duplicate_id.yaml", FIXTURES_DIR
+    )
+    assert result is None
+
+    # Check for the specific error message from IDPassValidationStep
+    captured = capsys.readouterr()
+    assert "ID duplicate_device redefined!" in captured.out

tests/unit_tests/core/test_entity_helpers.py

@@ -0,0 +1,595 @@
+"""Test get_base_entity_object_id function matches C++ behavior."""
+
+from collections.abc import Callable, Generator
+from pathlib import Path
+import re
+from typing import Any
+
+import pytest
+
+from esphome.config_validation import Invalid
+from esphome.const import CONF_DEVICE_ID, CONF_DISABLED_BY_DEFAULT, CONF_ICON, CONF_NAME
+from esphome.core import CORE, ID, entity_helpers
+from esphome.core.entity_helpers import get_base_entity_object_id, setup_entity
+from esphome.cpp_generator import MockObj
+from esphome.helpers import sanitize, snake_case
+
+from .common import load_config_from_fixture
+
+# Pre-compiled regex pattern for extracting object IDs from expressions
+OBJECT_ID_PATTERN = re.compile(r'\.set_object_id\(["\'](.*?)["\']\)')
+
+FIXTURES_DIR = Path(__file__).parent.parent / "fixtures" / "core" / "entity_helpers"
+
+
+@pytest.fixture(autouse=True)
+def restore_core_state() -> Generator[None, None, None]:
+    """Save and restore CORE state for tests."""
+    original_name = CORE.name
+    original_friendly_name = CORE.friendly_name
+    yield
+    CORE.name = original_name
+    CORE.friendly_name = original_friendly_name
+
+
+def test_with_entity_name() -> None:
+    """Test when entity has its own name - should use entity name."""
+    # Simple name
+    assert get_base_entity_object_id("Temperature Sensor", None) == "temperature_sensor"
+    assert (
+        get_base_entity_object_id("Temperature Sensor", "Device Name")
+        == "temperature_sensor"
+    )
+    # Even with device name, entity name takes precedence
+    assert (
+        get_base_entity_object_id("Temperature Sensor", "Device Name", "Sub Device")
+        == "temperature_sensor"
+    )
+
+    # Name with special characters
+    assert (
+        get_base_entity_object_id("Temp!@#$%^&*()Sensor", None)
+        == "temp__________sensor"
+    )
+    assert get_base_entity_object_id("Temp-Sensor_123", None) == "temp-sensor_123"
+
+    # Already snake_case
+    assert get_base_entity_object_id("temperature_sensor", None) == "temperature_sensor"
+
+    # Mixed case
+    assert get_base_entity_object_id("TemperatureSensor", None) == "temperaturesensor"
+    assert get_base_entity_object_id("TEMPERATURE SENSOR", None) == "temperature_sensor"
+
+
+def test_empty_name_with_device_name() -> None:
+    """Test when entity has empty name and is on a sub-device - should use device name."""
+    # C++ behavior: when has_own_name is false and device is set, uses device->get_name()
+    assert (
+        get_base_entity_object_id("", "Friendly Device", "Sub Device 1")
+        == "sub_device_1"
+    )
+    assert (
+        get_base_entity_object_id("", "Kitchen Controller", "controller_1")
+        == "controller_1"
+    )
+    assert get_base_entity_object_id("", None, "Test-Device_123") == "test-device_123"
+
+
+def test_empty_name_with_friendly_name() -> None:
+    """Test when entity has empty name and no device - should use friendly name."""
+    # C++ behavior: when has_own_name is false, uses App.get_friendly_name()
+    assert get_base_entity_object_id("", "Friendly Device") == "friendly_device"
+    assert get_base_entity_object_id("", "Kitchen Controller") == "kitchen_controller"
+    assert get_base_entity_object_id("", "Test-Device_123") == "test-device_123"
+
+    # Special characters in friendly name
+    assert get_base_entity_object_id("", "Device!@#$%") == "device_____"
+
+
+def test_empty_name_no_friendly_name() -> None:
+    """Test when entity has empty name and no friendly name - should use device name."""
+    # Test with CORE.name set
+    CORE.name = "device-name"
+    assert get_base_entity_object_id("", None) == "device-name"
+
+    CORE.name = "Test Device"
+    assert get_base_entity_object_id("", None) == "test_device"
+
+
+def test_edge_cases() -> None:
+    """Test edge cases."""
+    # Only spaces
+    assert get_base_entity_object_id("   ", None) == "___"
+
+    # Unicode characters (should be replaced)
+    assert get_base_entity_object_id("Température", None) == "temp_rature"
+    assert get_base_entity_object_id("测试", None) == "__"
+
+    # Empty string with empty friendly name (empty friendly name is treated as None)
+    # Falls back to CORE.name
+    CORE.name = "device"
+    assert get_base_entity_object_id("", "") == "device"
+
+    # Very long name (should work fine)
+    long_name = "a" * 100 + " " + "b" * 100
+    expected = "a" * 100 + "_" + "b" * 100
+    assert get_base_entity_object_id(long_name, None) == expected
+
+
+@pytest.mark.parametrize(
+    ("name", "expected"),
+    [
+        ("Temperature Sensor", "temperature_sensor"),
+        ("Living Room Light", "living_room_light"),
+        ("Test-Device_123", "test-device_123"),
+        ("Special!@#Chars", "special___chars"),
+        ("UPPERCASE NAME", "uppercase_name"),
+        ("lowercase name", "lowercase_name"),
+        ("Mixed Case Name", "mixed_case_name"),
+        ("   Spaces   ", "___spaces___"),
+    ],
+)
+def test_matches_cpp_helpers(name: str, expected: str) -> None:
+    """Test that the logic matches using snake_case and sanitize directly."""
+    # For non-empty names, verify our function produces same result as direct snake_case + sanitize
+    assert get_base_entity_object_id(name, None) == sanitize(snake_case(name))
+    assert get_base_entity_object_id(name, None) == expected
+
+
+def test_empty_name_fallback() -> None:
+    """Test empty name handling which falls back to friendly_name or CORE.name."""
+    # Empty name is handled specially - it doesn't just use sanitize(snake_case(""))
+    # Instead it falls back to friendly_name or CORE.name
+    assert sanitize(snake_case("")) == ""  # Direct conversion gives empty string
+    # But our function returns a fallback
+    CORE.name = "device"
+    assert get_base_entity_object_id("", None) == "device"  # Uses device name
+
+
+def test_name_add_mac_suffix_behavior() -> None:
+    """Test behavior related to name_add_mac_suffix.
+
+    In C++, when name_add_mac_suffix is enabled and entity has no name,
+    get_object_id() returns str_sanitize(str_snake_case(App.get_friendly_name()))
+    dynamically. Our function always returns the same result since we're
+    calculating the base for duplicate tracking.
+    """
+    # The function should always return the same result regardless of
+    # name_add_mac_suffix setting, as we're calculating the base object_id
+    assert get_base_entity_object_id("", "Test Device") == "test_device"
+    assert get_base_entity_object_id("Entity Name", "Test Device") == "entity_name"
+
+
+def test_priority_order() -> None:
+    """Test the priority order: entity name > device name > friendly name > CORE.name."""
+    CORE.name = "core-device"
+
+    # 1. Entity name has highest priority
+    assert (
+        get_base_entity_object_id("Entity Name", "Friendly Name", "Device Name")
+        == "entity_name"
+    )
+
+    # 2. Device name is next priority (when entity name is empty)
+    assert (
+        get_base_entity_object_id("", "Friendly Name", "Device Name") == "device_name"
+    )
+
+    # 3. Friendly name is next (when entity and device names are empty)
+    assert get_base_entity_object_id("", "Friendly Name", None) == "friendly_name"
+
+    # 4. CORE.name is last resort
+    assert get_base_entity_object_id("", None, None) == "core-device"
+
+
+@pytest.mark.parametrize(
+    ("name", "friendly_name", "device_name", "expected"),
+    [
+        # name, friendly_name, device_name, expected
+        ("Living Room Light", None, None, "living_room_light"),
+        ("", "Kitchen Controller", None, "kitchen_controller"),
+        (
+            "",
+            "ESP32 Device",
+            "controller_1",
+            "controller_1",
+        ),  # Device name takes precedence
+        ("GPIO2 Button", None, None, "gpio2_button"),
+        ("WiFi Signal", "My Device", None, "wifi_signal"),
+        ("", None, "esp32_node", "esp32_node"),
+        ("Front Door Sensor", "Home Assistant", "door_controller", "front_door_sensor"),
+    ],
+)
+def test_real_world_examples(
+    name: str, friendly_name: str | None, device_name: str | None, expected: str
+) -> None:
+    """Test real-world entity naming scenarios."""
+    result = get_base_entity_object_id(name, friendly_name, device_name)
+    assert result == expected
+
+
+def test_issue_6953_scenarios() -> None:
+    """Test specific scenarios from issue #6953."""
+    # Scenario 1: Multiple empty names on main device with name_add_mac_suffix
+    # The Python code calculates the base, C++ might append MAC suffix dynamically
+    CORE.name = "device-name"
+    CORE.friendly_name = "Friendly Device"
+
+    # All empty names should resolve to same base
+    assert get_base_entity_object_id("", CORE.friendly_name) == "friendly_device"
+    assert get_base_entity_object_id("", CORE.friendly_name) == "friendly_device"
+    assert get_base_entity_object_id("", CORE.friendly_name) == "friendly_device"
+
+    # Scenario 2: Empty names on sub-devices
+    assert (
+        get_base_entity_object_id("", "Main Device", "controller_1") == "controller_1"
+    )
+    assert (
+        get_base_entity_object_id("", "Main Device", "controller_2") == "controller_2"
+    )
+
+    # Scenario 3: xyz duplicates
+    assert get_base_entity_object_id("xyz", None) == "xyz"
+    assert get_base_entity_object_id("xyz", "Device") == "xyz"
+
+
+# Tests for setup_entity function
+
+
+@pytest.fixture
+def setup_test_environment() -> Generator[list[str], None, None]:
+    """Set up test environment for setup_entity tests."""
+    # Set CORE state for tests
+    CORE.name = "test-device"
+    CORE.friendly_name = "Test Device"
+    # Store original add function
+
+    original_add = entity_helpers.add
+    # Track what gets added
+    added_expressions: list[str] = []
+
+    def mock_add(expression: Any) -> Any:
+        added_expressions.append(str(expression))
+        return original_add(expression)
+
+    # Patch add function in entity_helpers module
+    entity_helpers.add = mock_add
+    yield added_expressions
+    # Clean up
+    entity_helpers.add = original_add
+
+
+def extract_object_id_from_expressions(expressions: list[str]) -> str | None:
+    """Extract the object ID that was set from the generated expressions."""
+    for expr in expressions:
+        # Look for set_object_id calls with regex to handle various formats
+        # Matches: var.set_object_id("temperature_2") or var.set_object_id('temperature_2')
+        if match := OBJECT_ID_PATTERN.search(expr):
+            return match.group(1)
+    return None
+
+
+@pytest.mark.asyncio
+async def test_setup_entity_no_duplicates(setup_test_environment: list[str]) -> None:
+    """Test setup_entity with unique names."""
+
+    added_expressions = setup_test_environment
+
+    # Create mock entities
+    var1 = MockObj("sensor1")
+    var2 = MockObj("sensor2")
+
+    # Set up first entity
+    config1 = {
+        CONF_NAME: "Temperature",
+        CONF_DISABLED_BY_DEFAULT: False,
+    }
+    await setup_entity(var1, config1, "sensor")
+
+    # Get object ID from first entity
+    object_id1 = extract_object_id_from_expressions(added_expressions)
+    assert object_id1 == "temperature"
+
+    # Clear for next entity
+    added_expressions.clear()
+
+    # Set up second entity with different name
+    config2 = {
+        CONF_NAME: "Humidity",
+        CONF_DISABLED_BY_DEFAULT: False,
+    }
+    await setup_entity(var2, config2, "sensor")
+
+    # Get object ID from second entity
+    object_id2 = extract_object_id_from_expressions(added_expressions)
+    assert object_id2 == "humidity"
+
+
+@pytest.mark.asyncio
+async def test_setup_entity_different_platforms(
+    setup_test_environment: list[str],
+) -> None:
+    """Test that same name on different platforms doesn't conflict."""
+
+    added_expressions = setup_test_environment
+
+    # Create mock entities
+    sensor = MockObj("sensor1")
+    binary_sensor = MockObj("binary_sensor1")
+    text_sensor = MockObj("text_sensor1")
+
+    config = {
+        CONF_NAME: "Status",
+        CONF_DISABLED_BY_DEFAULT: False,
+    }
+
+    # Set up entities on different platforms
+    platforms = [
+        (sensor, "sensor"),
+        (binary_sensor, "binary_sensor"),
+        (text_sensor, "text_sensor"),
+    ]
+
+    object_ids: list[str] = []
+    for var, platform in platforms:
+        added_expressions.clear()
+        await setup_entity(var, config, platform)
+        object_id = extract_object_id_from_expressions(added_expressions)
+        object_ids.append(object_id)
+
+    # All should get base object ID without suffix
+    assert all(obj_id == "status" for obj_id in object_ids)
+
+
+@pytest.fixture
+def mock_get_variable() -> Generator[dict[ID, MockObj], None, None]:
+    """Mock get_variable to return test devices."""
+    devices = {}
+    original_get_variable = entity_helpers.get_variable
+
+    async def _mock_get_variable(device_id: ID) -> MockObj:
+        if device_id in devices:
+            return devices[device_id]
+        return await original_get_variable(device_id)
+
+    entity_helpers.get_variable = _mock_get_variable
+    yield devices
+    # Clean up
+    entity_helpers.get_variable = original_get_variable
+
+
+@pytest.mark.asyncio
+async def test_setup_entity_with_devices(
+    setup_test_environment: list[str], mock_get_variable: dict[ID, MockObj]
+) -> None:
+    """Test that same name on different devices doesn't conflict."""
+    added_expressions = setup_test_environment
+
+    # Create mock devices
+    device1_id = ID("device1", type="Device")
+    device2_id = ID("device2", type="Device")
+    device1 = MockObj("device1_obj")
+    device2 = MockObj("device2_obj")
+
+    # Register devices with the mock
+    mock_get_variable[device1_id] = device1
+    mock_get_variable[device2_id] = device2
+
+    # Create sensors with same name on different devices
+    sensor1 = MockObj("sensor1")
+    sensor2 = MockObj("sensor2")
+
+    config1 = {
+        CONF_NAME: "Temperature",
+        CONF_DEVICE_ID: device1_id,
+        CONF_DISABLED_BY_DEFAULT: False,
+    }
+
+    config2 = {
+        CONF_NAME: "Temperature",
+        CONF_DEVICE_ID: device2_id,
+        CONF_DISABLED_BY_DEFAULT: False,
+    }
+
+    # Get object IDs
+    object_ids: list[str] = []
+    for var, config in [(sensor1, config1), (sensor2, config2)]:
+        added_expressions.clear()
+        await setup_entity(var, config, "sensor")
+        object_id = extract_object_id_from_expressions(added_expressions)
+        object_ids.append(object_id)
+
+    # Both should get base object ID without suffix (different devices)
+    assert object_ids[0] == "temperature"
+    assert object_ids[1] == "temperature"
+
+
+@pytest.mark.asyncio
+async def test_setup_entity_empty_name(setup_test_environment: list[str]) -> None:
+    """Test setup_entity with empty entity name."""
+
+    added_expressions = setup_test_environment
+
+    var = MockObj("sensor1")
+
+    config = {
+        CONF_NAME: "",
+        CONF_DISABLED_BY_DEFAULT: False,
+    }
+
+    await setup_entity(var, config, "sensor")
+
+    object_id = extract_object_id_from_expressions(added_expressions)
+    # Should use friendly name
+    assert object_id == "test_device"
+
+
+@pytest.mark.asyncio
+async def test_setup_entity_special_characters(
+    setup_test_environment: list[str],
+) -> None:
+    """Test setup_entity with names containing special characters."""
+
+    added_expressions = setup_test_environment
+
+    var = MockObj("sensor1")
+
+    config = {
+        CONF_NAME: "Temperature Sensor!",
+        CONF_DISABLED_BY_DEFAULT: False,
+    }
+
+    await setup_entity(var, config, "sensor")
+    object_id = extract_object_id_from_expressions(added_expressions)
+
+    # Special characters should be sanitized
+    assert object_id == "temperature_sensor_"
+
+
+@pytest.mark.asyncio
+async def test_setup_entity_with_icon(setup_test_environment: list[str]) -> None:
+    """Test setup_entity sets icon correctly."""
+
+    added_expressions = setup_test_environment
+
+    var = MockObj("sensor1")
+
+    config = {
+        CONF_NAME: "Temperature",
+        CONF_DISABLED_BY_DEFAULT: False,
+        CONF_ICON: "mdi:thermometer",
+    }
+
+    await setup_entity(var, config, "sensor")
+
+    # Check icon was set
+    assert any(
+        'sensor1.set_icon("mdi:thermometer")' in expr for expr in added_expressions
+    )
+
+
+@pytest.mark.asyncio
+async def test_setup_entity_disabled_by_default(
+    setup_test_environment: list[str],
+) -> None:
+    """Test setup_entity sets disabled_by_default correctly."""
+
+    added_expressions = setup_test_environment
+
+    var = MockObj("sensor1")
+
+    config = {
+        CONF_NAME: "Temperature",
+        CONF_DISABLED_BY_DEFAULT: True,
+    }
+
+    await setup_entity(var, config, "sensor")
+
+    # Check disabled_by_default was set
+    assert any(
+        "sensor1.set_disabled_by_default(true)" in expr for expr in added_expressions
+    )
+
+
+def test_entity_duplicate_validator() -> None:
+    """Test the entity_duplicate_validator function."""
+    from esphome.core.entity_helpers import entity_duplicate_validator
+
+    # Reset CORE unique_ids for clean test
+    CORE.unique_ids.clear()
+
+    # Create validator for sensor platform
+    validator = entity_duplicate_validator("sensor")
+
+    # First entity should pass
+    config1 = {CONF_NAME: "Temperature"}
+    validated1 = validator(config1)
+    assert validated1 == config1
+    assert ("", "sensor", "temperature") in CORE.unique_ids
+
+    # Second entity with different name should pass
+    config2 = {CONF_NAME: "Humidity"}
+    validated2 = validator(config2)
+    assert validated2 == config2
+    assert ("", "sensor", "humidity") in CORE.unique_ids
+
+    # Duplicate entity should fail
+    config3 = {CONF_NAME: "Temperature"}
+    with pytest.raises(
+        Invalid, match=r"Duplicate sensor entity with name 'Temperature' found"
+    ):
+        validator(config3)
+
+
+def test_entity_duplicate_validator_with_devices() -> None:
+    """Test entity_duplicate_validator with devices."""
+    from esphome.core.entity_helpers import entity_duplicate_validator
+
+    # Reset CORE unique_ids for clean test
+    CORE.unique_ids.clear()
+
+    # Create validator for sensor platform
+    validator = entity_duplicate_validator("sensor")
+
+    # Create mock device IDs
+    device1 = ID("device1", type="Device")
+    device2 = ID("device2", type="Device")
+
+    # Same name on different devices should pass
+    config1 = {CONF_NAME: "Temperature", CONF_DEVICE_ID: device1}
+    validated1 = validator(config1)
+    assert validated1 == config1
+    assert ("device1", "sensor", "temperature") in CORE.unique_ids
+
+    config2 = {CONF_NAME: "Temperature", CONF_DEVICE_ID: device2}
+    validated2 = validator(config2)
+    assert validated2 == config2
+    assert ("device2", "sensor", "temperature") in CORE.unique_ids
+
+    # Duplicate on same device should fail
+    config3 = {CONF_NAME: "Temperature", CONF_DEVICE_ID: device1}
+    with pytest.raises(
+        Invalid,
+        match=r"Duplicate sensor entity with name 'Temperature' found on device 'device1'",
+    ):
+        validator(config3)
+
+
+def test_duplicate_entity_yaml_validation(
+    yaml_file: Callable[[str], str], capsys: pytest.CaptureFixture[str]
+) -> None:
+    """Test that duplicate entity names are caught during YAML config validation."""
+    result = load_config_from_fixture(yaml_file, "duplicate_entity.yaml", FIXTURES_DIR)
+    assert result is None
+
+    # Check for the duplicate entity error message
+    captured = capsys.readouterr()
+    assert "Duplicate sensor entity with name 'Temperature' found" in captured.out
+
+
+def test_duplicate_entity_with_devices_yaml_validation(
+    yaml_file: Callable[[str], str], capsys: pytest.CaptureFixture[str]
+) -> None:
+    """Test duplicate entity validation with devices."""
+    result = load_config_from_fixture(
+        yaml_file, "duplicate_entity_with_devices.yaml", FIXTURES_DIR
+    )
+    assert result is None
+
+    # Check for the duplicate entity error message with device
+    captured = capsys.readouterr()
+    assert (
+        "Duplicate sensor entity with name 'Temperature' found on device 'device1'"
+        in captured.out
+    )
+
+
+def test_entity_different_platforms_yaml_validation(
+    yaml_file: Callable[[str], str],
+) -> None:
+    """Test that same entity name on different platforms is allowed."""
+    result = load_config_from_fixture(
+        yaml_file, "entity_different_platforms.yaml", FIXTURES_DIR
+    )
+    # This should succeed
+    assert result is not None

tests/unit_tests/fixtures/core/config/area_id_collision.yaml

@@ -0,0 +1,10 @@
+esphome:
+  name: test-collision
+  area:
+    id: duplicate_id
+    name: Area 1
+  areas:
+    - id: duplicate_id
+      name: Area 2
+
+host:

tests/unit_tests/fixtures/core/config/area_id_hash_collision.yaml

@@ -0,0 +1,10 @@
+esphome:
+  name: test
+  areas:
+    - id: test_2258
+      name: "Area 1"
+    - id: d6ka
+      name: "Area 2"
+
+esp32:
+  board: esp32dev

tests/unit_tests/fixtures/core/config/device_duplicate_id.yaml

@@ -0,0 +1,10 @@
+esphome:
+  name: test
+  devices:
+    - id: duplicate_device
+      name: "Device 1"
+    - id: duplicate_device
+      name: "Device 2"
+
+esp32:
+  board: esp32dev

tests/unit_tests/fixtures/core/config/device_id_collision.yaml

@@ -0,0 +1,10 @@
+esphome:
+  name: test
+  devices:
+    - id: test_2258
+      name: "Device 1"
+    - id: d6ka
+      name: "Device 2"
+
+esp32:
+  board: esp32dev

tests/unit_tests/fixtures/core/config/device_invalid_area.yaml

@@ -0,0 +1,12 @@
+esphome:
+  name: test
+  areas:
+    - id: valid_area
+      name: "Valid Area"
+  devices:
+    - id: test_device
+      name: "Test Device"
+      area_id: nonexistent_area
+
+esp32:
+  board: esp32dev

tests/unit_tests/fixtures/core/config/device_without_area.yaml

@@ -0,0 +1,7 @@
+esphome:
+  name: test-device-no-area
+  devices:
+    - id: test_device
+      name: Test Device
+
+host:

tests/unit_tests/fixtures/core/config/legacy_string_area.yaml

@@ -0,0 +1,5 @@
+esphome:
+  name: test-legacy-area
+  area: Living Room
+
+host:

tests/unit_tests/fixtures/core/config/multiple_areas_devices.yaml

@@ -0,0 +1,22 @@
+esphome:
+  name: test-multiple
+  area:
+    id: main_area
+    name: Main Area
+  areas:
+    - id: area1
+      name: Area 1
+    - id: area2
+      name: Area 2
+  devices:
+    - id: device1
+      name: Device 1
+      area_id: main_area
+    - id: device2
+      name: Device 2
+      area_id: area1
+    - id: device3
+      name: Device 3
+      area_id: area2
+
+host:

tests/unit_tests/fixtures/core/config/valid_area_device.yaml

@@ -0,0 +1,11 @@
+esphome:
+  name: test-valid-area
+  areas:
+    - id: bedroom_area
+      name: Bedroom
+  devices:
+    - id: test_device
+      name: Test Device
+      area_id: bedroom_area
+
+host:

tests/unit_tests/fixtures/core/entity_helpers/duplicate_entity.yaml

@@ -0,0 +1,13 @@
+esphome:
+  name: test-duplicate
+
+esp32:
+  board: esp32dev
+
+sensor:
+  - platform: template
+    name: "Temperature"
+    lambda: return 21.0;
+  - platform: template
+    name: "Temperature"  # Duplicate - should fail
+    lambda: return 22.0;

tests/unit_tests/fixtures/core/entity_helpers/duplicate_entity_with_devices.yaml

@@ -0,0 +1,26 @@
+esphome:
+  name: test-duplicate-devices
+  devices:
+    - id: device1
+      name: "Device 1"
+    - id: device2
+      name: "Device 2"
+
+esp32:
+  board: esp32dev
+
+sensor:
+  # Same name on different devices - should pass
+  - platform: template
+    device_id: device1
+    name: "Temperature"
+    lambda: return 21.0;
+  - platform: template
+    device_id: device2
+    name: "Temperature"
+    lambda: return 22.0;
+  # Duplicate on same device - should fail
+  - platform: template
+    device_id: device1
+    name: "Temperature"
+    lambda: return 23.0;

tests/unit_tests/fixtures/core/entity_helpers/entity_different_platforms.yaml

@@ -0,0 +1,20 @@
+esphome:
+  name: test-different-platforms
+
+esp32:
+  board: esp32dev
+
+sensor:
+  - platform: template
+    name: "Status"
+    lambda: return 1.0;
+
+binary_sensor:
+  - platform: template
+    name: "Status"  # Same name, different platform - should pass
+    lambda: return true;
+
+text_sensor:
+  - platform: template
+    name: "Status"  # Same name, different platform - should pass
+    lambda: return {"OK"};