Yet another mcu 'mcu': Unable to connect Ender 3 pro

General Discussion
1

Basic Information:

Printer Model: 2020 Ender 3 Pro
MCU / Printerboard:
Host / SBC: Raspberry Pi 4 with Octoprint
klippy.log (135.1 KB)

klippy.log

Describe your issue: I’m trying to get Klipper to run on my Ender 3 Pro. I first set up octoprint and then installed klipper. I used make menuconfig and set it up according to the config file for my printer from klipper3d

printer.cfg (2.6 KB)
. I then got the klipper.bin file and renamed it and flashed it via sd card (according to the instructions on the config file)

I checked the serial port using ls /dev/serial/by-id/* like a dozen times and it always came up the same (in any case I set it in the mcu in the config) and put it in the /home/pi/ folder. I set up octoprint to connect to /tmp/printer. The problem I’m getting is that once I hit restart firmware I get “Klipper state: Disconnect” and it never reconnects. In the terminal I still get Recv: ok T:0 Send: M105 so it seems like it’s connected…?

I’ve been browsing for hours and trying every solution I can see but nothing has helped. Any help would be greatly appreciated!
…

2

See Issues flashing the printer board

3

I’ve tried everything listed there and more but nothing works. I just got a new cable today to test that but still no luck unfortunately. But just to confirm, if the .bin flashed correctly, the main screen/control should cease to function right? So if I plug the screen back in and it still functions as before it failed to flash?

4

Welcome mesograt, your first post,

I guess, you start with Klipper?

Two ways, I may recommend to understand and find a solution for the problem.

  • Use the “search” function here. I’m very positiv, it was discussed before.
  • YouTube, many people posted about that problem.

Always look here!
https://www.klipper3d.org/Overview.html
https://klipper.discourse.group/t/about-the-knowledge-base-category-table-of-contents

I guess, a new “USB cable”. If right, that’s not your root cause.

You may consider your starting setup. I would recommend another web interface. Mainsail or Fluidd. In my eyes OctoPrint is a generation before, but read about it and make up your mind.

Good luck,
hcet14