Let me share my findings for Volvo P3 owners. I have Volvo XC70 MY2012 with 7" Sensus infotaiment and my goal was to integrate Android Auto and preserve the OEM look. As far as I know there are not many options to force the infotaimant screen to project your own video signal. Even the solutions from chinese manufacturers of Andorid Auto/Carplay boxes need you to disassemble the screen and install a custom PCB board with additional flex cables.
I went another direction and I'm using front camera input. The standard front blind view camera picture (NTSC) can be displayed only up to certain speed (20 or 30km/h). But there is also an option called "Police Front Camera" which then expects PAL signal and there is no speed threshold that would shut off the projection (or I haven't reached the limit yet
). Climate control and other infotaiment overlays are displayed over the camera picture. The composite video quality is obivously not perfect, but acceptable to me.This should work for all Sensus and Sensus Connect with 7" display on P3 platform (S60/V60, XC60, V70/XC70, S80 model years +/- 2011–2016). To enable/change the Front Camera settings you need change car configuration using diagnostic cable (I used VDASH from D5T5: https://d5t5.com/article/vdash-volvo-diagnostic).
I have also added a 7" touch screen with USB driver.
For audio, I'm using the original Volvo bluetooth integration, so I'm using Hudiy only for the "video part".
"speechAudio" : false,
"mediaAudio" : false,
Works nice for both HF calling and audio streaming (even when controlling the call/Spotify via Android Auto).
Other than that, my setup is pretty standard:
- RPi4, 2GB RAM
- booting from SSD USB disk
- AXAGON ADA-17 USB sound card + additional microphone for Android Auto voice control
Let me know if you have any questions of suggestions.