but do you have any ideas on how I would do the communication?
I'd probably need SPI, though how slow is slow if I wanted to go the serial port route? Also the main atmega, would run at 8MHZ so it wont be super speedy anyways...
@JoeN: I'm probably going to have them made in batches of about 50 to 100, still a bit early to know for sure.
Yup$2.43http://www.digikey.com/product-detail/en/ATMEGA168A-AU/ATMEGA168A-AU-ND/2271188Same at mouserhttp://www.mouser.com/ProductDetail/Atmel/ATMEGA168A-AU/?qs=sGAEpiMZZMvqv2n3s2xjse40PngS4U1xVADwi5G8n9Y%3d