Configuration Method
Notice
Please note that after using this method, you will not be able to use the accelerometer interface on mini pad to connect an external accelerometer.
- Open the BOOT disk and find
armbianEnv.txt
and open it - Modify uart2 in
overlays=usbhost2 usbhost3 uart2
to uart3 and save it

Wiring Method
- Please note that the TX of mini-pad should be connected to the RX of the mainboard with the serial port firmware installed
- Please note that the RX of mini-pad should be connected to the TX of the mainboard with the serial port firmware installed
- Please note that a common ground is required
- Otherwise, you will not be able to connect to the mainboard with the serial port firmware installed

Klipper Reference Configuration
[mcu]
serial: /dev/ttyS3
baud:250000
# The baud rate used. Default is 250000
restart_method:command