@kontrollable Wow.. the lead times in this conversation.. I saw your answer now. I had about a million other projects going on and havn't taken on mysensors yet. I had some problems with the radio and was about to switch to rfm69, but never got around to it. Now I started thinking about it again. But, I actually am thinking somewhat in the line of discontinuing mysensors network. It is to much, hacks and tricks, and I forget everything in between sessions. In all the years I have not yet one single mysensors device running. I would love to see more of your set up, maybe it could sway me to try it for the radiator relay setup.