Add debug-logging for testing

Author: bouwew

plugwise/__init__.py

@@ -529,6 +529,7 @@ async def async_update(self) -> PlugwiseData:
         """Perform an incremental update for updating the various device states."""
         # Perform a full update at day-change
         day_number = dt.datetime.now().strftime("%w")
+        LOGGER.debug("Day-number, Previous-number: %s, %s", day_number, self._previous_day_number)
         if (
             day_number  # pylint: disable=consider-using-assignment-expr
             != self._previous_day_number