[curlymo]

Yes, and ofc it all depends on what you consider a difference, pimatic's homeduino is written with the Arduino software and some existing libraries. The pilight usb nano is written in plain C and is all our own code. We choose this approach to keep full control over de microcontroller and to know exactly what is going on in every inch. I also allows you to flash your microcontroller without having to use the Arduino software. I would suggest testing them both and see what works best for you.