Is there any cheap way to the carpc read 12v signals from the car?
What I want to do is make carpc aware of 4 or 6 signals in the car, like doors open, 4x4 mode, headlights one, etc. is there any cheap way?
I was thinking in using a serial to usb adapter, but how wire the serial to the 12v peripherals? And how about the software ?
Thanks for any help!