for people with OpenSuse or Ubuntu having problems connecting to the logger:
the rxtx libraries need write access to /var/lock , to solve this add your user to the uucp group and change the group ownership of the /var/lock directory:
sudo nano /etc/group
#search for uucp and append your username to this line
sudo chgrp -R uucp /var/lock
log out of your X-Session and log in again (or just reboot). Now you should be able to connect providing the tty you see in dmesg (e.g. /dev/ttyACM0).
dmesg | grep tty
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