BPi M2 Zero connection to Einsy Motherboard

What is the problem?
Running Octopi on BPi M2 Zero ( banana pi zero)
trying to connect to Einsy motherboard (Pursa MK3s+) but unable to get boards to communicate with each other

What did you already try to solve it?
Running Armbian 21.08.1 Buster with Linux 5.15.89-sunxi
Trying to communicate via UART ports on pins 8,10 on banana pi board
Already activated port with sudo armbian-config
Overlays have been set : /boot/armbianEnv.txt
overlays=pps-gpio uart1 uart2 uart3 wl-gpio

on Octopi server added additional serial port

yet when trying to connect octopi does not detect serial port and wont connect

tried raspberry pi 2w way of communicating with no success

Does anyone has ideas on how to enable communication between pins 8,10 or maybe GPIO


Additional information about your setup (OctoPrint version, OctoPi version, printer, firmware, what kind of hardware precisely, ...)
OctoPrint : 1.8.6
3D Printer: Prusa MK3S+
Firnware: 3.12.1
Banana PI Zero ( H3)

Hello @wilsgarc

Have you checked the MK3 for the correct firmware setting?


For USB it has to be off

that has been turn on

The UART ports on armbian are going to be /dev/ttyS* instead of /dev/ttyAMA*.

Ports ttyS0 - ttyS3 were already on the select menu
adding more would not make a difference
I finally got it working with implementing new printer calibration

Thanks for the help