minicom: cannot open /dev/ttyUSB3: Device or resource busy

Question

i have quectel EC 25 modem in my pc. i am using ubuntu 16.04 OS. while using minicom it showing this minicom: cannot open /dev/ttyUSB3: Device or resource busy error.

score 3 · Accepted Answer · answered Jan 14 '20 at 07:08

3

You have two options:

Use minicom with sudo.
Add your user to the dialout group by
```
sudo usermod -aG dialout $USER
```

Logout and login. After that you'll be able to reach your modem without sudo.

answered Jan 14 '20 at 07:08

Pilot6

92,041

minicom: cannot open /dev/ttyUSB3: Device or resource busy

1 Answers1