Are you evading this question for some reason? It is important to know. Any metal will greatly interfere with the signals.
Is there any outlets you could possibly plug in a zwave repeater around here?
I am guessing you are in Europe somewhere, so not sure what is available for repeaters.
Also, sorry if this was responded to already but this is a long thread, how is the hub powered? PoE power (with a splitter) is known to cause z-wave problems. PoE and the C8 (with extensive testing)
