Printer Model: Ender3v2 and Ender 3v3 SE
MCU / Printerboard: BTT Pad
Host / SBC- Mainsail
klippy.log
Running ls /dev/serial/by-path/* to see what USB are plugged in and assign them to each printer. however, regardless of what port I assign them after reboot, only one printer connects. sometimes its the v2, other times it’s the SE. I can’t find a rhyme or reason for it.
v2log.log (903.9 KB)
SElog.log (901.1 KB)
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Are you sure the printer have different serials?
I assumed so, however, admittedly not sure. How would I check that. When I run by ID I get this
biqu@BTT-Pad7:~$ ls /dev/serial/by-id/* /dev/serial/by-id/usb-1a86_USB_Serial-if00-port0
only 1 response shows up.
Have you tried to get the id by just connecting one printer when running ls... and then the other one?
I unplugged, rebooted and ran the ls, then repeated with the other printer on a different USB, however, I ended with the same result
biqu@BTT-Pad7:~$ ls /dev/serial/by-id/* /dev/serial/by-id/usb-1a86_USB_Serial-if00-port0
Then you won’t be able to run them both with two Klipper instances on one SBC.
No instance can know to what printer it should connect.
Am I not able to identify them by-path instead, and assign them accordingly?
They also will have the same id by-path
When I run by path I get to entrys
biqu@BTT-Pad7:~$ ls /dev/serial/by-path/* /dev/serial/by-path/platform-5200000.usb-usb-0:1.2:1.0-port0 /dev/serial/by-path/platform-5200000.usb-usb-0:1.3:1.0-port0
If I unplug one and run it again it only shows 1 knowing one was unplugged.
Sorry, maybe I’m being dense here…
You may give it a try
I have it configured in my printer.cfg as
[mcu] serial: /dev/serial/by-path/platform-5200000.usb-usb-0:1.2:1.0-port0 restart_method: command
In the documents they mentioned flashing the micro controller with something like this
sudo service klipper stop make flash FLASH_DEVICE=/dev/serial/by-id/usb-1a86_USB2.0-Serial-if00-port0 sudo service klipper start
Should I run
sudo service klipper stop make flash **/dev/serial/by-path/platform-5200000.usb-usb-0:1.2:1.0-port0**=**/dev/serial/by-path/platform-5200000.usb-usb-0:1.2:1.0-port0** sudo service klipper start
I’m unsure what the printer’s unique serial port name would be.
Everything here is correct. My issue was there was another [mcu] section in my printer.cfg I did not see, causing issues. Once I deleted it worked like a charm
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