I have recently implemented a Fibaro FGS-212 switch. http://amzn.to/28Rqtsr
It was picked up in smartthings fine and is set up as a Z-Wave Device (Multichannel) and I can toggle it on and off fine, my problem is every now and then mostly at night after it hasn’t been toggled for a while it becomes un-responsive. Turning it off at the main and back on again brings it back to life and it operates fine again for a good few hours but once left has trouble responding, sometimes it does work after a few on/off toggles.
Does this sound like something might be timing out on the device or more like a connectivity issue between the device and the hub?