Hello all, thanks for the help & taking time to read my post.
I would like to use an arduino to control my steering wheel audio buttons. I ditched my factory stereo for a tablet & am using a Boss MC900B amp with built in bluetooth. This amp comes with a wired remote. I would like to intercept the signals from the remote & send them to an arduino where i can then print out info like current volume on an lcd screen... plus program my steering wheel controls to control the Boss unit as if the commands were coming from its own remote.
Ok, all that said... i took apart the Boss remote hoping to find a chip on the board to ID the communication protocol... not much luck there. Here is a pic... Does anyone know what I'm dealing with here?
Looking at the picture, wait for a helper doing the same thing. It will likely take time.
Regarding the lack of links to datasheets, no ordinary helper can help You.
Looking at the first board photo, it looks like many consumer wired remotes.
Using the 3.5mm jack, it uses two pins for DC power, and a third pin for an R2R resistor ladder to provide different voltages for each of the buttons.
That’s very easy to feed into the analog input of an Arduino.
The fourth pin will likely do something similar for the LEDS feeding back to the remote, you’ll have to scope around that pin to see what’s happening. (it’s the only one left!)
Aahh, my steering wheel controls are also R2R ladder! Thanks, I'll dig in to that more & let you guys know.
Alto777: there is nothing on the back of remote board & not sure about the mainboard as i didn't try to remove it... doubt there is anything on the back, though.
