He’s using an Arduino Uno and an Ethernet breakout board to hook it up to the network. This allows him to send text messages to himself when the alarm system is armed, disarmed, or triggered.

Also on board is the Atmel SAM3X8E – the same chip in the new Arduino DUE – and has pinouts ... GPIO pins, Gigabit Ethernet, a camera connector, one SATA port (on the quad-core version ...