Thanks for the reply, Phil. I didn't know about the $14=78, I did know about $14=7 but didn't realize I could/should make it 78.
On another note. After not finding on line a solution I did what I should have done...
My setup is: RPi 3B+ and Teensy 4.1. I have loaded grblHAL on the Teensy and bCNC on the RPi. The moment I start bCNC it start running something and I can't do nothing to stop it, as can be seen in the video. I have no...