Merge pull request #71 from Meatballs1/last_eval

Update service.py

custom_components/hypervolt_charger/service.py

@@ -64,7 +64,7 @@ async def async_set_schedule(service: ServiceCall) -> None:
             tracker = hass.states.get(tracker_id)
 
         if tracker is not None:
-            if tracker.attributes.get("last_evaluated", None) is None:
+            if tracker.attributes.get("target_times_last_evaluated ", None) is None:
                 _LOGGER.info("Tracker not evaluated yet")
                 if backup_available is False:
                     _LOGGER.warning("Tracker data not available and no backup set, unable to set schedule")