I implemented a full version of the control system for that Sirius box. I drive the control loop off of a PC via a FTDI cable which I terminated in the required DIN Connector. I added one line from the AVP that is a trigger that stays high when the AVP is on and the Sirius is selected as the source. That unit has a trigger line to power it on and off.
Works like a charm with no problem. Control is from wall mounted iPads using software I designed in Command Fusion to talk to the PC that controls the Theater/Audio room.
I have posted the archive on my web site (the-gordons.net) bottom of the main page follow the link to downloads, then in the first section you should find it.
Last edited by Barry Gordon on September 3, 2012 17:40.