avrdude: ser_open(): can't open device /dev/ttyACM0: Permission denied

Magraina 0
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I use vscode with Arduino extension on Ubuntu 22.04.1 LTS which had worked well until now. If I'm trying to upload I'm getting the error:

avrdude: ser_open(): can't open device "/dev/ttyACM0: Permission denied"

When trying to upload a sketch to an Arduino Micro.

Then I tried it with the Arduino IDE 1.8.19 which produces the same error.

I have added my user to the dialout group even though it had worked before without that (and I restarted after that). If I change chmod of /dev/ttyACM0 that does not help at all.

If I do:

~ $ ls -al /dev/ttyACM0 
crw-rw----+ 1 root dialout 166, 0 Sep 14 00:15 /dev/ttyACM0

~ $ id
uid=1000(magraina) gid=1000(magraina) groups=1000(magraina),4(adm),20(dialout),24(cdrom),27(sudo),30(dip),46(plugdev),122(lpadmin),134(lxd),135(sambashare)

I was able to run avrdude manually with sudo

So I have now setup a rule under: /etc/udev/rules.d named 50-myusb.rules

With:

SUBSYSTEM=="usb", MODE="0666", GROUP="dialout"

Now I'm able to run avrdude in the terminal to upload my sketch manually without sudo, but I'm still unable to run it through vscode or the Arduino IDE.

What else can I do?

ubuntu arduino linux
1 Answers

It's more like a workaround but it's a solution that works for me.

Now the Arduino IDE in Version 2.0 has been released. I downloaded it and run it. With that version I'm now able to to upload a sketch as usual. But sadly I could not find a solution for vscode as the Arduino extension only supports the old version for now.

Even though vscode runs avrdude from the same path as the new version of the Arduino IDE does. It seems to me like, as if vscode has different user rights and I don't know how to change that.

Magraina0
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