I am having difficulty changing permission to access ttyACM0 when controlling a transmitter connected to my laptop via a USB cable. I have confirmed that the port is ttyACM0. I added the group ‘dialout’ using the command: sudo groupadd dialout, then putting myself in that group with the command: sudo usermod -a -G dialout grant. When I try to activate CAT control of the radio via the software (wsjyx) I still am still getting permission denied. Any ideas what I am missing?
Did you reboot after adding your user to the group?
Yes I certainly did. Learnt that lesson the hard way !
I have finally found the solution. On checking what groups my system has (cat /etc/groups) I noticed the group uucp (this is for RS-232 serial ports and devices connected to them). Thought I’d try adding myself to that goup (# usermod -a -G uucp grant), rebooted and it worked! So uucp was preferable to dialout in my case.