Quote: Originally Posted by khemical
Once I get some extra scratch, I was going to pick one of these up and decoded the M-Bus system. Already working on a library to interact with the Sirius info for the kenwood 502, and I am hoping it is similar in commands. The cable should'nt be too hard to decifer, as all that should be needed is the L/R power and ground, and the m-bus power/ground. Hopefully a serial cable will be fast enough to have the audio go through it also, but may actually need to use some tom-foollery to get it going =/.
steve
Hopefully you mean the AiNet and NOT the M-Bus. Obviously AiNet is the current bus that is used by Alpine devices. Only ancient euipment uses the M-Bus and those communications were cracked long ago. I'm only pointing this out so you don't start to look in the wrong place...
But you would make a lot of people happy if you reverse engineered the AiNet Protocol. (Oh, you might make a few people unhappy at Alpine, but screw them...) There are so many things I would like to connect to my HU, but Alpine has made it very difficult by keeping their interface so secret.
While you're at it, please consider also cracking their Amplifier Bus. That is a bus that allows you to display things like amp gain, power, temperature directly on your HU. It would be more useful for displaying other things like indoor/outdoor temp, car voltage, etc. but again Alpine doesn't want anybody to actually use the feature so they keep it secret.