CR10Max - -mcu 'mcu': Unable to connect

General Discussion
1

Basic Information:

Printer Model: CR10Max
MCU / Printerboard: Creality V2.4 + EBB42
klippy.log

Printer was running with no issues without EBB42 but also was well overdue an update so cant be sure whats lead to the new issue.

following re-wiring printer to allow dual z control and a fresh klipper install, MCU would connect successfully after commenting out functions removed from creality v2.4 board that have been moved to the EBB but before CAN/EBB42 was setup

after several issues, CAN/EBB42 seems to be up and running but now get a new error ‘mcu ‘mcu’: Unable to connect’

Anyone able to offer any advice as to resolution?

Thanks in advanced

…
klippy.log (89.7 KB)

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[mcu]
serial = /dev/serial/by-id/usb-FTDI_FT232R_USB_UART_A10K2YA3-if00-port0
baud = 1000000

Why did you change the default baud rate? 1M is not a valid baud for AVR (or any serial connection). You need to reflash the board with the default 250k setting and update your printer.cfg to match.

1 Like
3

EBB42 has got an accelerometer and the advice I found online was to use either 500000 or 1000000 for everything. I’ve also ordered an eddie current level sensor which advises to use 1000000 so thats what I went with.

Is that likely to be causing my issue?

4

This refers to the CAN bus speed, not the serial baud rate of the board.

5

Thanks for the comments above. As I was writing about the baud rate I thought it should only be can…flashed the board to 250000 and edited the printer.cfg and it’s all working lovely.

…well that bits working, just got to troubleshoot a couple of new build type problems.

Thanks for the input!

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