* use `None` instead of `-1` for temps and wattages this way it's easier for other tools like HomeAssistant to understand if the temperature is really negative or not available * also handle cases where we look for `-1`
* use `None` instead of `-1` for temps and wattages this way it's easier for other tools like HomeAssistant to understand if the temperature is really negative or not available * also handle cases where we look for `-1`