Why not have a little lipo battery or battery bank with the rpi, and have it charge/run off that? Make it like a little UPS where the rpi shuts down if it gets too low. Then you don’t have to wait 7 seconds for it to boot unless you haven’t driven in a while.
Interesting that it says CarPlay but it doesn't seem to support maps or other apps, just music playback? For me, maps are the real killer feature of CarPlay
Fantastic read!
Really enjoyed reading this write up. For exotics there is typically less people tinkering with them and that makes it even more cool when you manage some hack/mod!
For Porsches, it's easier as they do share infotainment stuff with other VAG vehicles and there is an online community that also tinkers with PCMs (Porsche's infotainment).
In my old 991.2 I managed to unlock Android Auto which was never officially supported using that community's efforts - it was completely functional, just disabled in favor of a CarPlay-only offering. (This changed with the 992 where it comes with both systems standard). And by plugging in a Motorola MA1 one has Wireless Android Auto on a car that never supported even the wired version. Sweet.
One day we might see a real Doom on 911 write up because the viral video from a few years ago is sadly fake. But just by going with the information/tools available in the modding community it's completely possible. Most of the GUI on it is Java apps BTW :)