This is what we are hooking it to. Although I doubt anyone has ever seen or heard of it.
http://espar.com/html/products/hydronic5.html
This is the data sheet on the chip we want to hook up to the Aurduino. HTTP 301 This page has been moved
As far as it reading serial data I don't know what else to call it.
We just want to read the information coming in off the k line of the device go through the si9243 chip to the Aurduino. And when the information being received is XXX coming out we wan tAurduino to use a relay to shut off an external fan and pump.
Greg