RyanF

I found this freeware program that communicates I2C via a computer's parallel port. http://www.boerde.de/~matthias/delphi/ What addresses the controller uses and what to communicate is another story.

I haven't given up yet on simulating the I2C communications to get my luminescence light working with the 1st gen IQ2020. You can find the watkins service manuals including electrical schematics here. Don't waste your time downloading the Detechtive software, it's just a bloated, web-based diagnostics for dummies manual. Another interesting file from the ftp site is the component description exe/zip/pdf. It describes the function of all the parts including some useful control panel button combinations. I'll keep posting as I learn more about how the I2C communications work.

Here's what I've been able to dig up so far on the internet. I think the motherboard communicates with the accessories via the I2C protocol. I'm basing this on the fact that the instructions for the Luminescence multi-color light reference the I2C Communications port. Wiki has some links to I2C interface adapters: http://en.wikipedia.org/wiki/I%C2%B2C At one time I found some PDF pages from the Hot Springs internal technical manual on the internet. I saved them on my hard drive but can't find them again on the internet now. I don't see where I can attach PDFs on this forum. If you give me your email or an ftp site I can send you what I have. Though I don't think you will find much useful information in the files. The diagrams are more of a part number level and not so much schematics. If you make any headway on this, maybe you could help me out with my dilemma. I have a 2001 Sovereign with the IQ2020 controller. I purchased the $200 Luminescence light assuming it would work, but it hasn't. I don't think they will take it back. If you figure out the Communications Port pinout, or how to do basic communications with the controller I think that would push me in the right direction.