I'm starting a system design for my car that will need an interface between each subsystem (alarm and locks, engine control, windows and lights, stereo, displays ect...) I chose I2C over RS-485 because it is widely accepted and easy to impliment with minimal parts. Has anyone tried using it in an automotive environment? I'm concerned there might be to much interference causing data transmittion problems.
Is there maybe a better thread for this question someone knows about?
Thanks for any input