Add last data refresh sensor

Add last data refresh sensor - Timestamp when services were refreshed successfully for the last time.

volkswagencarnet/vw_connection.py

@@ -615,6 +615,9 @@ async def getSelectiveStatus(self, vin, services):
                         f"Did not receive return data for requested service {service}. (This is expected for several service/car combinations)"
                     )
 
+            if response:
+                response.update({"refreshTimestamp": datetime.now()})
+
             return response
 
         except Exception as error:

volkswagencarnet/vw_dashboard.py

@@ -1030,6 +1030,12 @@ def create_instruments():
             icon="mdi:api",
             unit="",
         ),
+        Sensor(
+            attr="last_data_refresh",
+            name="Last data refresh",
+            icon="mdi:clock",
+            unit="",
+        ),
         BinarySensor(attr="external_power", name="External power", device_class=VWDeviceClass.POWER),
         BinarySensor(attr="energy_flow", name="Energy flow", device_class=VWDeviceClass.POWER),
         BinarySensor(

volkswagencarnet/vw_vehicle.py

@@ -2673,3 +2673,23 @@ def api_token_status_last_updated(self) -> datetime:
     def is_api_token_status_supported(self):
         """Parkingposition API status is always supported."""
         return True
+
+    @property
+    def last_data_refresh(self) -> bool:
+        """Check when services were refreshed successfully for the last time."""
+        last_data_refresh_time = "Unknown"
+        last_data_refresh_path = "refreshTimestamp"
+        if is_valid_path(self.attrs, last_data_refresh_path):
+            last_data_refresh_time = find_path(self.attrs, last_data_refresh_path)
+            return last_data_refresh_time.strftime("%Y-%m-%d %H:%M:%S")
+        return last_data_refresh_time
+
+    @property
+    def last_data_refresh_last_updated(self) -> datetime:
+        """Return attribute last updated timestamp."""
+        return datetime.now()
+
+    @property
+    def is_last_data_refresh_supported(self):
+        """Last data refresh is always supported."""
+        return True