kreyren@leonid # dmesg -w
...
[1112144.472508] usb 2-1.4: new full-speed USB device number 52 using 
ehci-pci
[1112144.581981] usb 2-1.4: New USB device found, idVendor=1a86, 
idProduct=7523, bcdDevice= 2.64
[1112144.582001] usb 2-1.4: New USB device strings: Mfr=0, Product=2, 
SerialNumber=0
[1112144.582008] usb 2-1.4: Product: USB Serial
[1112144.582624] ch341 2-1.4:1.0: ch341-uart converter detected
[1112144.584305] usb 2-1.4: ch341-uart converter now attached to ttyUSB0

kreyren@leonid $ ls /dev/tty[^0-9]*
/dev/ttyprintk    /dev/ttyS14  /dev/ttyS20  /dev/ttyS27 /dev/ttyS5
/dev/ttyS0    /dev/ttyS15  /dev/ttyS21  /dev/ttyS28  /dev/ttyS6
/dev/ttyS1    /dev/ttyS16  /dev/ttyS22  /dev/ttyS29  /dev/ttyS7
/dev/ttyS10    /dev/ttyS17  /dev/ttyS23  /dev/ttyS3   /dev/ttyS8
/dev/ttyS11    /dev/ttyS18  /dev/ttyS24  /dev/ttyS30  /dev/ttyS9
/dev/ttyS12    /dev/ttyS19  /dev/ttyS25  /dev/ttyS31  /dev/ttyUSB0
/dev/ttyS13    /dev/ttyS2   /dev/ttyS26  /dev/ttyS4

Looking at the output it seems to be looking for ^\/dev\/ttyUSB[0-9]+ 
for various baud rates on stock Creality Ender-3


 > I don't know anything about your context, BTW ;) -- Richter

Elaborate?

On 2/22/22 19:23, Bengt Richter wrote:
> On +2022-02-19 14:27:42 +0000, Jacob Hrbek wrote:
>> Ultimaker Cura is a powerful LGPL-3.0 licensed STL-to-GCODE generator
>> (https://github.com/Ultimaker/Cura) used for 3D printing.
>>
>> Additionally it is capable of enabling printing through USB on GNU Guix
>> which is currently not possible as no guix package is able to recognize
>> and send fabricating instructions to /dev/ttyUSB0 which is provided by
>> the printers (note that the user has to be in `dialout` group in order
>> to use the device).
>>
> I get this (i.e., S1 instead of USB)
>
> --8<---------------cut here---------------start------------->8---
> $ ls /dev/tty[^0-9]*
> /dev/ttyS0  /dev/ttyS1  /dev/ttyS2  /dev/ttyS3
> --8<---------------cut here---------------end--------------->8---
>
> What do you get?
>
> I don't know anything about your context, BTW ;)
>
>> --
>> Jacob Hrbek, In support of ukraine sovereignty #supportUkraine
>>
> pub EdDSA 256/AB42FCA9 2021-01-21 kreyren@rixotstudio.cz <kreyren@rixotstudio.cz>
>> sub  ECDH 256/86142789 2021-01-21
>>
> --
> Regards,
> Bengt Richter

-- 
Jacob Hrbek, In support of ukraine sovereignty #supportUkraine