@workswellforme thanks a lot for the two links. I see another rabbit hole in my future. My main issue I have with power messuring is, that my power meeter is three stories away from my flat. And the M5Stack Atom Lite looks interesting need to find a project for it ;-)
@V_ Expect an update when I get it all working :) Tricky working with that distance in terms of getting the data, yes!