Hi Roland, yes in the end I managed to finish compiling without error. I tried with a Windows-10 machine, a Linux Ubuntu laptop and a RaspberryPi-4 and various versions of Arduino IDE, MySensors and NodeManager. Unfortunately, thereafter I got problems running the sketch and because of too little understanding of the NodeManager programming gave up for the time being. I dismantled my setup and cannot remember which combination of soft/hardware gave me compiling success in the end. It now seems that at least part of my problems may be due to the fact that I did not yet have a NRF24L01 hooked up to the ESP8266 so I will give things another try in the future.
