Code can be found here:
http://code.mios.com/trac/mios_arduino-sensor/browser/trunk/Arduino/VeraGateway

==Hardware==

This is the stuff you need to purchase to build the ArduioGateway. Note that I've provided links to the things I bought during the development. You might find it cheaper somewhere else. 

1xArduino Nano (with usb connector)
http://www.aliexpress.com/item/Free-Ship-Wholesale-IC-Parts-Integrated-Circuits-Atmel-ATmega328-Board-with-Mini-USB-Cable-Full-Compatible/704043993.html