Wondering how I would be able to send signals to my car (ford focus 2014) in order to turn on and control lights on the dash and various alarms in the car such as the open door alarm and car alarm.
We have been using an Arduino Uno with a CAN-BUS shield to access diagnostics and receive signals (such as RPM/Speed) from the OBD port but are having difficulty figuring out how to send signals to the car to programmatically turn on/off functions of the car.
There is little documentation out there, but people have said that it is possible. My question is how do you go about coding the Arduino to send signals to the car.
Thanks!