Kari,

Thanks for the reply. See below.

You issuded "sudo usermod ..", right?

After that, did you log off and on again?

Does command 'id' show 'dialout' as one of your groups now?

I’m not sure I had logged off and back on, but I did just now.

Id shows that pi is a member of the dialout group

What does command 'ls -ltr /dev/tty*' show when you have

the KUSB cable connected?

crw-rw---- 1 root dialout 188, 0 May 11 10:19 /dev/ttyUSB0

What exactly does not work? How did you test?

I retested, and it seems the only thing not working is the Test CAT button.

73,

Mark