@momo90 said in Some questions before I start ordering parts.: @atzohy said in Some questions before I start ordering parts.: Cannot automatic discover thing node I'm not using the mysensors binding in openhab, i followed this https://www.smarthomeblog.net/diy-home-automation-sensors/ excellent tutorial and everything is working. I didnt realise, that the warning was in the openhab log. Have you tried to define the node id in the sketch and add the sensor manually in openhab via a .thing and .item file like here described? https://github.com/tobof/openhab2-addons/wiki/Examples Hi, thanks for your reply. I've redone all the wiring and now everything works for me, even automatic discovery. I had edited my previous post, maybe you haven't seen it. But I still appreciate your help!