Netatmo Valves - internet required?

Hardware
1

Hi
I am thinking about Netatmo Valves. Does anybody know whether relay needs Internet to be able to talk with HA?

I do not want another spy and wanted to block Internet access for the relay on the router…

2

There is no official support of this valves from HA. There is only some custome component. I might be wrong but all APIs for Netatmo products require internet.

3

Thanks! I will look into z wave then :).