myStrom integration

I am new to Home Assistent and trying to develop my first automation. I have a myStrom Switch and a Netatmo weather station. The goal is to be able to switch on when the humidity reaches a certain threshold.
I try to add the Switch using the specification here: myStrom - Home Assistant. However, it appears under Entities and not under Devices. I am not sure how I can use it in a script then.

Hello Philippe,
Did you ever get it solved? As HA newbie I have exactly the same problem.