Add unique_id for Daikin entities (#18747)

homeassistant/components/climate/daikin.py

@@ -192,6 +192,11 @@ def name(self):
         """Return the name of the thermostat, if any."""
         return self._api.name
 
+    @property
+    def unique_id(self):
+        """Return a unique ID."""
+        return self._api.mac
+
     @property
     def temperature_unit(self):
         """Return the unit of measurement which this thermostat uses."""

homeassistant/components/daikin.py

@@ -132,3 +132,8 @@ def update(self, **kwargs):
             _LOGGER.warning(
                 "Connection failed for %s", self.ip_address
             )
+
+    @property
+    def mac(self):
+        """Return mac-address of device."""
+        return self.device.values.get('mac')

homeassistant/components/sensor/daikin.py

@@ -71,6 +71,11 @@ def __init__(self, api, monitored_state, units: UnitSystem,
         if self._sensor[CONF_TYPE] == SENSOR_TYPE_TEMPERATURE:
             self._unit_of_measurement = units.temperature_unit
 
+    @property
+    def unique_id(self):
+        """Return a unique ID."""
+        return "{}-{}".format(self._api.mac, self._device_attribute)
+
     def get(self, key):
         """Retrieve device settings from API library cache."""
         value = None