I repurposed an old Android 2.3 phone (rooted HTC Wildfire S [marvelc]) as the navigation device for my motorcycle.
My motorcycle has a 4-way handlebar control for the factory navigation (which I don't feel like paying $900 for...)
I'm in the process of debugging the interface of that control on my motorcycle, and eventually I want to interface it to the marvelc via USB.
I was thinking on buying a cheap tablet keyboard and use the wires of that to access the functions that I need (I would need to "scroll" between UI elements, also to "click" on them, and use the "back" button somehow. I don't know if all of these are possible with a physical keyboard or not, but some very old Android devices had controls like this.)
I'm just trying to ask the community, if this option is even feasible?
Also, since I'll need a microcontroller for capturing the input of the 4-way control from the motorcycle, I was thinking on implementing the Android keyboard USB interface on that same microcontroller, but I couldn't find any documentation or protocol description on that. If you could point me in the right direction, I'd greatly appreciate it