I'm trying to connect Octoprint running on RPI3 via GPIO pins to Prusa MK3 (Einsy Rambo 1.1b), not via USB cable.
I have enabled RPI port via Prusa menues, which should enable TX and RX pins.
On RPI3 I have run raspi-config and enabled hardware serial port but disabled linux console via serial.
I have connected TX, RX and GND pins, but I still can't connect them via Octoprint web UI.
I now have /dev/ttyserial0 and serial1:
serial0 -> ttyS0
serial1 -> ttyAMA0
So should I use ttyS0 or ttyAMA0 ?
Any other suggestions?
I tried reversing TX/RX pins but still serial is not connecting.