Basic Information: Printer Model: Geeetech A20T MCU / Printerboard: GT2560 V4.0 klippy.log klippy.log (108.3 KB) printer.cfg printer.cfg (2.1 KB) flash config [image] My issue 1: So I have my RPi Zero 2 connected to my printer board directly via uart (uart 3 on atmega2560 and uart 0 on…

Fixed - broken wire, but couln’t upload directly with klipper make script had to use: avrdude -v -q -p atmega2560 -c arduino -P /dev/ttyAMA0 -D -b 115200 -U flash:w:klipper/out/klipper.el f.hex:i

Can't connect to MCU or upload

General Discussion

hcet14 September 26, 2023, 9:29pm 10

Did you try
ls /dev/serial/by-id/*
from Mcu: Serial connection closed / Timeout on connect / Wait for identify_response

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Can't connect to MCU or upload

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