Flashing Ender 3 v2 klipper no serial connection

General Discussion
1

Basic Information:

Printer Model: Ender 3 v2
MCU / Printerboard: Creality 4.2.2
Host / SBC: Raspberry Pi / Octopi

There are no logs as klipper has yet to connect to the printer.

I successfully compiled klipper again the Ender 3 v2 ( klipper/config/printer-creality-ender3-v2-2020.cfg at master · Klipper3d/klipper · GitHub ).

I then loaded the klipper.bin file into the rootfs of a freshly formatted FAT (4096 Kb) micro sd card. The file was named firmware20251009.bin.

After removing all power/usb to the unit, I inserted the SD card and only ran the power supply. The controller appeared to detect something as the screen showed no activity.

After waiting several minutes, I powered the system down, removed the sd card, and power it back up also reconnecting the micro usb.

No flash screen was displayed on tge screen. The octopi detects the USB serial device /dev/serial/by-id/. Attempts to connect to the device succeed but no data is returned.

No attempts using Minicom or other serial programs have succeeded.

I have attempted to rebuild klipper with the same STM32F103 attempting every serial option but have yet had the microcontroller respond back.

Opening the case there is a single blue LED that is lit, and other devices such as the CR touch perform their self check whne powered on, but I have yet to communicate with the controller at this point.

2

Hello @Blackninja543 !

How did you setup Klipper on/with OctoPi/OctoPrint?

So, you don’t have connection of Klipper with the printer or no connection of OctoPrint with Klipper?

You should get the klippy.log without connection to the printer.

How did you setup Klippr on/with OctoPi/OctoPrint?

3

Its working now… I forgot 2 things:

  1. Create the printer.cfg file in my home directory.
  2. Fix a permissions issue that changed I changed at some point in the past.
1 Like
4

This topic was automatically closed 30 days after the last reply. New replies are no longer allowed.