@mwittig and @Wolfpack both thanks for your offer, but i hope i can progress without it.
I ordered a smart socket, so testing the interfacing is ok. You create an account via the app and i assume devices are added via the app to the Meross cloud.
After that the plugin should be able to discovery added devices and use them.
I’ll start with the smart socket and when the basics are working i will add the MSG100.