@poohzaza said in duets wifi display mod:
@Danal dose panel due port work like regular usb and panel due is like a computer that issue m code right
Correct. The PanelDue, or anything that you build and attach to that serial port, must issue periodic commands to find things like the temperature or the current position. And parse the result.
The PaneDue, or similar, must issue G-Code command sequences if it wishes the printer to move.
And so on and so forth. The hardware serial port is a 3.3V TTL hardware serial, the bytes that flow down that hardware link are G and M codes to the printer, and responses back.