Add unique_id for Ring (#17497)

homeassistant/components/binary_sensor/ring.py

@@ -73,6 +73,7 @@ class RingBinarySensor(BinarySensorDevice):
                                       SENSOR_TYPES.get(self._sensor_type)[0])
         self._device_class = SENSOR_TYPES.get(self._sensor_type)[2]
         self._state = None
+        self._unique_id = '{}-{}'.format(self._data.id, self._sensor_type)
 
     @property
     def name(self):
@@ -89,6 +90,11 @@ class RingBinarySensor(BinarySensorDevice):
         """Return the class of the binary sensor."""
         return self._device_class
 
+    @property
+    def unique_id(self):
+        """Return a unique ID."""
+        return self._unique_id
+
     @property
     def device_state_attributes(self):
         """Return the state attributes."""