Switch allows setting devices on or off. Use this for everything that's not a lightbulb. A switch needs two KNX addresses, one for status (listen) and one for switching (set).
You can also use an Outlet, if it is just a socket.
In case something is not clear or not working according to your expectation you can contact us, and we will provide instant feedback. We can be reached by email at support@thinka.eu, or by phone at +31-20-2420666
