If images are not showing they can be seen at: https://ibb.co/mHzY2Xm https://ibb.co/1Z6LqJM
Progress is slow, but atleast it's still progress :)

Now the setup is Raspberry 4 on KonstaT's LineageOS: https://konstakang.com/devices/rpi4/LineageOS17.1/ which is runnig the AutoPlay.apk for the Carplay usb-dongle. Image/analog audio is taken from raspberrys TV-out and feeded to MMI trough AMI-port. I enabled video in motion using OBD11 so the image is visible during driving. Tests shown on images were still controlled using USB-keyboard.

Next step is connect the RPI4's serial port to the MMI control panel. The control panel communicates with the mainunit using rs232 not CAN. I started mapping the commands using some cheap USB-serial adapter, but there were too many dirty characters to make any use of it. I need to give it another try using RPI native serial, and then figure out a way for:

a) Use these serial commands and keyboard inputs for android
b) Build logic that these command only controll the android when "media input" is selected. I dont want the wheel to controll the rpi if im on radio mode :)