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I just installed Ubuntu 22.04 and installed Arduino using

snap install arduino

which installed as expected. I am aware I need to add my user to the dialout group, so I searched /dev for ttyACM* and also ttyUSB* using: sudo ls -al /dev/ttyUSB* and sudo ls -al /dev/ttyACM* but got

ls: cannot access '/dev/ttyUSB*': No such file or directory

and

ls: cannot access '/dev/ttyACM*': No such file or directory

I checked the ringbuffer for either of those using

sudo dmesg | grep tty

and got the following output:

[    0.167893] printk: console [tty0] enabled
[   86.158991] usb 2-2: FTDI USB Serial Device converter now attached to ttyUSB0
[   88.005204] usb 2-2: usbfs: interface 0 claimed by ftdi_sio while 'brltty' sets config #1
[   88.006033] ftdi_sio ttyUSB0: FTDI USB Serial Device converter now disconnected from ttyUSB0
[ 1578.498248] usb 2-2: FTDI USB Serial Device converter now attached to ttyUSB0
[ 1580.221903] usb 2-2: usbfs: interface 0 claimed by ftdi_sio while 'brltty' sets config #1
[ 1580.223379] ftdi_sio ttyUSB0: FTDI USB Serial Device converter now disconnected from ttyUSB0
[ 1714.844660] usb 2-2: FTDI USB Serial Device converter now attached to ttyUSB0
[ 1716.573774] usb 2-2: usbfs: interface 0 claimed by ftdi_sio while 'brltty' sets config #1
[ 1716.574710] ftdi_sio ttyUSB0: FTDI USB Serial Device converter now disconnected from ttyUSB0

So ttyUSB0 does seem to be there.

It doesnt seem to be permissions (I think) since its not saying "Permission denied".

I also tried adding to the udev rules: sudoedit /etc/udev/rules.d/50-myusb.rules and added the following lines: KERNEL=="ttyUSB[0-9]*",MODE="0666"

KERNEL=="ttyACM[0-9]*",MODE="0666"

then saved and logged out and back in, but no change. I also tried rebooting, just to be sure.

I'm not sure how to proceed from here, can anyone please point me in the right direction?

user4805834
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1 Answers1

4

For anyone else running into this same problem, here's what I found that worked for me.

After more searching I found this link.

I removed brltty using the command: sudo apt remove brltty then rebooted.

After that when I ran: sudo dmesg -w and then plugged in the Arduino, I could see it and it was now able to be found under /dev/ttyUSB0.

Now I can program my Arduino!

user4805834
  • 51
  • For some more in-depth information, see: https://unix.stackexchange.com/questions/670636/unable-to-use-usb-dongle-based-on-usb-serial-converter-chip – Serge Stroobandt Oct 14 '22 at 18:11