Printer has a problem Serial is missing

General Discussion
1

ls /dev/serial/by-path/* in the same printer has a problem Serial is missing model elegoo neptune 3 pro
Screenshot 2023-04-14 221540

2

Normally you list them by-id
ls /dev/serial/by-id/*

3

Hi sopon,

you are funny. What about

Basic Information:

Printer Model:
MCU / Printerboard:
klippy.log

Good luck, hacet14

4

I tried the test and got the same name. because the same model board for all 3 printers

5

I tried the test and got the same name. because the same model board for all 3 printers .

6

@hcet14 is correct. With such limited information it is hard to provide any help.

Generally:

  • Connecting by-path is possible
  • Depending on printer board, Klipper usually assigns a dedicated ID that allows differentiation also by serial
  • Noteworthy exception are printer boards with a CH340 USB bus convert chip
  • Differentiation via UDEV rules is also possible

I suggest making sure that the 3 printers are able to connect individually and from there continue to explore how to let them work together

Also note that you will need multiple Klipper instances with multiple cfgs and multiple connection endpoints, e.g. /tmp/printer1, /tmp/printer2 etc.