Neat!
I just tried it and noted that you need to select the specific room/zone the climate device is in. Would it also be possible to have the widget use the input of sub zones? E.g. I have several Netatmo devices in my house. Each in a different room/zone. If I select the overarching zone (Home) that includes all the rooms, the widget shows no info. Would be nice if the widget would show an average of all the climate devices in the sub zones.