@petergebruers  @bell_dan Thanks both of you for your help.   So i moved the switch near to my controller. Did a quick rangetest and i can see switch has direct connection with HC2 (glowing green) Now it works. So what is wrong..... Is it necessary that the switch needs to communicate directly with HC2 ? As i said before the switch works fine but updates his status through a neighbourdevice. (glowing yellow). Is this a bug ? Fibaro ?