@derksuh For information which version of the board defs you use (and for up- and downgrading also): Within the Arduino IDE you can just use the boardmanager (Tools menue, as far as I remember) to do this...

@derksuh Sorry to hear but your sketch looks good. Are you using the MySensors development branch? If not, doing so will probably fix the behavior because there was a bug in the 2.0 release that prevented messages from being sent (i.e. the request()) in the setup() method of a sketch. Once you upgrade to the MySensors development branch, if it still doesn't behave properly, please post the messages logged by the node, with #MY_DEBUG enabled.

@derksuh great work. Thanks for reporting back.

If you are using the analog output you might be able to remove the lm393 and the pcb it is mounted on entirely. Like I did on my plant monitoring as described in https://forum.mysensors.org/topic/2147/office-plant-monitoring/21

@derksuh Ok, but it still needs your code to find a place within the loop if I'm not mistaken? I'm not a c-programmer, so now and then I'm somewhat confused by the code of others. I learn by doing, which is now and then a process of copy-paste and at other moments analysing how others did it. BR, Boozz