In the meantime, I fixted the problem. It seems, that my HS110 has an wobble contact. After hitting ist some times, it were able toll switch.For clarification (Addition to problem description):The...

Model : Hardware Version : Firmware Version : ISP : Hello, yesterday I received my pair of HS110, one of the just works fine, but the second one wont switch. If I turn it off, the light on the plug...