feat: Expose polling interval as a sensor (#948)

* feat: Expose polling interval as a sensor

* style: auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* feat: Expose polling interval as a sensor

* style: auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

custom_components/tesla_custom/sensor.py

@@ -16,6 +16,7 @@
     UnitOfPressure,
     UnitOfSpeed,
     UnitOfTemperature,
+    UnitOfTime,
 )
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers.entity import EntityCategory
@@ -73,6 +74,7 @@ async def async_setup_entry(hass: HomeAssistant, config_entry, async_add_entitie
         entities.append(TeslaCarArrivalTime(car, coordinator))
         entities.append(TeslaCarDistanceToArrival(car, coordinator))
         entities.append(TeslaCarDataUpdateTime(car, coordinator))
+        entities.append(TeslaCarPollingInterval(car, coordinator))
 
     for energy_site_id, energysite in energysites.items():
         coordinator = coordinators[energy_site_id]
@@ -649,3 +651,19 @@ def native_value(self) -> datetime:
         else:
             date_obj = last_time.replace(tzinfo=dt.UTC)
         return date_obj
+
+
+class TeslaCarPollingInterval(TeslaCarEntity, SensorEntity):
+    """Representation of a Tesla car polling interval."""
+
+    type = "polling interval"
+    _attr_device_class = SensorDeviceClass.DURATION
+    _attr_state_class = SensorStateClass.MEASUREMENT
+    _attr_native_unit_of_measurement = UnitOfTime.SECONDS
+    _attr_entity_category = EntityCategory.DIAGNOSTIC
+    _attr_icon = "mdi:timer-sync"
+
+    @property
+    def native_value(self) -> int:
+        """Return the update time interval."""
+        return self.coordinator.controller.get_update_interval_vin(vin=self._car.vin)