In our cellar (where the "fusebox lives") there is no wifi. I was a bit sad to find out that the web-gui (luci) is very "basic". Now I'm trying to set the fluksometer up with wired-ethernet-only" on the cli. If I do find out how to do this I will report back.
ps: maybe the little swich on the side could be used to switch between wifi for internet accces-wired-ethernet for configuration and wired-ethernet-for-everything?