Hello everyone,

It's hard to find any documentation regarding the head-unit side of things in Android Auto, but I am sure what I want is possible, at least on the „official” channel. I saw in a factory system on a Ford car, that while Waze was running on Android Auto on the main screen, a small secondary screen in the dashboard showed the next directions instruction (ex. turn left in .... and an arrow indicating it).

Do you know of any kind of API or other kind of interface that I could get this kind of info out on the raspberry Pi side? I am just interested in harvesting this information, so that I can write my own software that does something with it (display on a secondary screen for my instrument panel or project it as a HUD on the base of the windshield, etc.)

Just a random guess but maybe it has something to do with NDS - https://nds-association.org/tomtom-go-navigation-app-2/ (although I see no mention of Google around there but it seems like the right research direction).

Any help or link to relevant docs is very much appreciated.