Add attribute support to Home Assistant sensors (#1770)

Co-authored-by: Jesse Hills <3060199+jesserockz@users.noreply.github.com>

tests/custom.h

@@ -49,6 +49,7 @@ class CustomNativeAPI : public Component, public CustomAPIDevice {
     register_service(&CustomNativeAPI::on_start_dryer, "start_dryer", {"value"});
     register_service(&CustomNativeAPI::on_many_values, "many_values", {"bool", "int", "float", "str1", "str2"});
     subscribe_homeassistant_state(&CustomNativeAPI::on_light_state, "light.my_light");
+    subscribe_homeassistant_state(&CustomNativeAPI::on_brightness_state, "light.my_light", "brightness");
   }
 
   void on_hello_world() { ESP_LOGD("custom_api", "Hello World from native API service!"); }
@@ -69,4 +70,5 @@ class CustomNativeAPI : public Component, public CustomAPIDevice {
     call_homeassistant_service("homeassistant.restart");
   }
   void on_light_state(std::string state) { ESP_LOGD("custom_api", "Got state %s", state.c_str()); }
+  void on_brightness_state(std::string state) { ESP_LOGD("custom_api", "Got attribute state %s", state.c_str()); }
 };

tests/test2.yaml

@@ -63,6 +63,10 @@ sensor:
   - platform: homeassistant
     entity_id: sensor.hello_world
     id: ha_hello_world
+  - platform: homeassistant
+    entity_id: climate.living_room
+    attribute: temperature
+    id: ha_hello_world_temperature
   - platform: ble_rssi
     mac_address: AC:37:43:77:5F:4C
     name: 'BLE Google Home Mini RSSI value'
@@ -246,6 +250,10 @@ binary_sensor:
   - platform: homeassistant
     entity_id: binary_sensor.hello_world
     id: ha_hello_world_binary
+  - platform: homeassistant
+    entity_id: binary_sensor.hello
+    attribute: world
+    id: ha_hello_world_binary_attribute
   - platform: ble_presence
     mac_address: AC:37:43:77:5F:4C
     name: 'ESP32 BLE Tracker Google Home Mini'
@@ -355,6 +363,10 @@ text_sensor:
   - platform: homeassistant
     entity_id: sensor.hello_world2
     id: ha_hello_world2
+  - platform: homeassistant
+    entity_id: sensor.hello_world3
+    id: ha_hello_world3
+    attribute: some_attribute
   - platform: ble_scanner
     name: Scanner