USB Device ID

[pyro]

I have a robot that attaches as a serial device via USB. In order to make the connection I need to provide the \dev name. I can see the device in system info, but I cannot determine how to provide a name. My comm port is ttyS0 but what do I call a USB device when its identity changes with each new attachment? Yes I did reach and research this topic before posting and yes I am a linux noob :)

[klaus2008]

I would suggest that you connect your device and issue
sudo hwinfo > /home/knoppix/hwinfo.login a terminal. Afterwards you can load the log file /home/knoppix/hwinfo.log in an editor and try to find your device. Since you will get a huge file it could take some time to find the device.