[redshift]

If anyone in here has problems connecting your device without sudo, make sure to add your user to the uucp group. And then logout / login so it takes effect.

It's good advice to check your groups.  It won't be uucp on all types of systems, though.  You can tell which group by running

Code:

ls -l /dev/ttyACM*

in a terminal.  You'll see something like "root uucp" or "root dialout" in the middle.  Root is the owning user, and uucp/dialout/etc. is the owning group.  You'll want to use that group.