Add additional sensors (#381)

* Add Last Audio Self Test and Last Manual Self Test

Adding two more datetime sensors for test times.

* Add Removed from Base sensor

I have chosen tray-remove as icon, as it looks similar to the protect being removed.

custom_components/nest_protect/binary_sensor.py

@@ -140,6 +140,14 @@ class NestProtectBinarySensorDescription(
         icon="mdi:water-percent",
         value_fn=lambda state: not state,
     ),
+    NestProtectBinarySensorDescription(
+        key="removed_from_base",
+        name="Removed from Base",
+        device_class=BinarySensorDeviceClass.PROBLEM,
+        entity_category=EntityCategory.DIAGNOSTIC,
+        icon="mdi:tray-remove",
+        value_fn=lambda state: state,
+    ),
     NestProtectBinarySensorDescription(
         key="auto_away",
         name="Occupancy",

custom_components/nest_protect/sensor.py

@@ -98,6 +98,20 @@ class NestProtectSensorDescription(SensorEntityDescription):
         device_class=SensorDeviceClass.DATE,
         entity_category=EntityCategory.DIAGNOSTIC,
     ),
+    NestProtectSensorDescription(
+        name="Last Audio Self Test",
+        key="last_audio_self_test_end_utc_secs",
+        value_fn=lambda state: datetime.datetime.utcfromtimestamp(state),
+        device_class=SensorDeviceClass.DATE,
+        entity_category=EntityCategory.DIAGNOSTIC,
+    ),
+    NestProtectSensorDescription(
+        name="Last Manual Test",
+        key="latest_manual_test_end_utc_secs",
+        value_fn=lambda state: datetime.datetime.utcfromtimestamp(state),
+        device_class=SensorDeviceClass.DATE,
+        entity_category=EntityCategory.DIAGNOSTIC,
+    ),
     NestProtectSensorDescription(
         name="Temperature",
         key="current_temperature",