[Hotter]

Does anyone know what is hardware difference between these steering wheel buttons?



I know that programmable buttons need CCC, which I don't have. But what if I would add them, would I get different CAN BUS messages and could read them with Arduino and trigger the action I like?

Do they have some kind of hardware difference which changes CAN BUS message or hardware is the same just need to change something in NCSexper?

[Hotter]

I think different buttons has different resistors. So in theory it should be possible to install M/diamond/star buttons and they should have different resistors in the circuit which would generate different CAN BUS message and hopefully it wont trigger anything and I could receive it with Arduino and trigger something I want.

So the question is what are the resistors for M/diamond/star and other buttons? Is it possible to get circuit photos? Maybe circuit photos exists somewhere? Or anyone able to open and take photos of M/diamond/star button circuits? I would take photos of my buttons too (I have regular Disk/Rotate buttons). It would be possible to compare and see what resistors responsible for what functionality.

[Hotter]

I think buttons hardware is exactly the same, as its seems to send exactly same can bus messages https://www.e90post.com/forums/showp...9&postcount=73

So buttons seems to be controlled by CCC/RAD2 software...

I wonder what would happen if I would set RAD22_MDRIVE aktiv in RAD2. Would it allow me to use at least fake M button, although rotate button is even more useless...

[GtiGyver]

Hello Hotter.
Sorry to revive this 3 year old thread but I've been wondering the same thing.

I tried replacing the button panel with one that featured the M and diamond buttons but it had no effect, and the boards were completely identical.

Any changes you found in NCSexpert that fixed this?

Thanks

[ptpending]

i think that audio source and star buttons send similar signal to headunit, and ccc does allow to assign different options
the M button may send different signal, tough

[GtiGyver]

Originally Posted by ptpending

i think that audio source and star buttons send similar signal to headunit, and ccc does allow to assign different options
the M button may send different signal, tough

Thanks.
Seems the feature to assign new functions for the "star" and "diamond" buttons was lost in the CCC to CIC transition.