serial2pty:

Creates a device under /dev/pts/ that is connected to the serial
device of a simulated mote. Thus you can use existing programs
to communicate with the serial device of a mote.
The plugin runs as normal user, so no root privileges are necessary.

If you have questions, feel free to drop me a mail: 
serial2pty OBVIOUS_SIGN frimberger.de


INSTALL:
========
- copy content to cooja/apps/serial2pty 
- run ant jar
- Cooja: add project path under Settings -> Cooja Projects
- Have fun!