I also have a BMW thermal imaging camera, the 2nd Gen BMW system,4 wire interface,and the research work has made little progress
1 camera interface definition.(1.JPG)
2, the decoder using MAX9260, as long as the build simple circuit can output RGB encoding 16bit, the logic analyzer results, video decoding is correct, but the camera does not output pixel data, should be the protection mechanism of the problem.
3, the use of PC through the MAX9260 to send the camera command (232, RX/TX), in some baud rate can receive replies, but I do not have the exact command, can not let the camera work properly.
If you have a BMW car or rent a car, you can grab data with a simple tool(logical analyzer or serial port tool), you can remove the protection mechanism.
Wiring mode is as follows