don't forget to dodagger38 wrote: Tuesday 16 June 2020 22:51 on USB0
sudo cu -l /dev/ttyUSB0 -s 115200 --parity=none -E q
cu: open (/dev/ttyUSB0): Permission denied
cu: /dev/ttyUSB0: Line in use
sudo chmod 666 /dev/ttyUSB0
and make sure domoticz is stopped.