General :: Assign Oneself To A Group To Get Access To A File

I'm on a regular Fedora 9 desktop computer with an ext3fs filesystem.

I'm trying to give myself access to /dev/ttyS0. This is because I'm developing code that uses a serial port. While I'm developing this code I don't want to be continually working as super user. I have the following information about /dev/ttyS0:

Code:

So as root I added myself (username freddy) to the group uucp. This is just temporary, for while I work on this code and try different stuff as user freddy. Once the code is established and I have a single program with a fixed name, I plan to give myself an entry in /etc/sudoers that will allow me to run the finished program.

Here's the info on user freddy:

Code:

The problem then is that now if I try to use /dev/ttyS0 I can't.

Code:

I thought that if I was a member of group uucp which is associated with /dev/ttyS0 that I would be given rw access to /dev/ttyS0. What am I missing here?

What the c stands for in the ls -l listing?