Hello, Do you have experience interfacing with a vehicles ECU? Perhaps with OBD? I would also like to develop something to work as an ECU for cars without an ECU.

I have OBD readers but I want to be able to remotely start the car or turn it off... roll windows up or down and turn on/off the AC. Also unlock/lock doors. I'd like to back up the ECU and get timestamps. For example, when tesla updates their ECU, I want to know. Roll back to previous state if possible. Think we can do any of this?