The PropController has the ability to add an RS485 out. At present I have DMX and Renard code to run "legacy" items. DMX in will work too its just a matter of code, in fact I think jstjohnz has some code for that already.In fact, you might be able to get a head start on the RS485 interface. IIRC, jstjohnz and DynamoBen have mentioned DMX to/from E1.31 gateway functionality. It sounds like you're quite interested in the pixel controller, but need the RS485 interface. I obviously can't speak for them, but perhaps they'd be willing to share information about that as well if asked nicely.