I've connected a Led to a GPIO of the RPi Zero WLan.
Added a PY Script and a SystemCommand
If usind SystemCmd (LightON) the Printer is getting Offline
Since this LedOn is RPi only and does not (IMO) effects the serial bus to the printer i've no idea what happened.
I'm not sure if this happens every time and also to my second printer with a seperate RPi.
I'll try this later
It is a Artillery X1 Printer