RGB Alarm lamp for Maven

I created an RGB visual system to show the results of Maven executions.

The system is based on a AVR microcontroller + high power RGB led. It connects to the USB port of the computer running Maven.

The hardware is basically made by the RGB programmable lamp:
http://www.youtube.com/watch?v=Q8WsKM9C1sU

While Maven is executing, the lamp is Blue.

When the result is good (successful), the lamp turns Green.
When the result is bad (failure), the lamp turns Red.

The software is made of Scala + Bash scripts and it is open source (GPL v3)

How to control serial device from shell

setup serial port:

$ stty -F /dev/ttyUSB0 raw
$ cat /dev/ttyUSB0 > /dev/null &

send commands (translating from hex string to binary):

$ echo "ff 00 00 01 04 00 01 81 03 00 00 ff" | xxd -r -p > /dev/ttyUSB0