These ‘computers’ send and receive information over the cars’ CAN BUS. It is a message-based protocol, designed originally for multiplex electrical wiring within automobiles, but is also used in many other contexts.’Ī modern car has many ECUs (or Electronic Control Units). ‘A Controller Area Network ( CAN bus) is a vehicle bus standard designed to allow microcontrollers and devices to communicate with each other in applications without a host computer. Quoting from the CAN BUS Wikipedia article: If you have an interest in what goes on with your cars’ electronics, you might want to invest some time hacking your car with an Arduino and a CAN BUS Module. In fact, General Motors is one of the largest computer manufacturers due to its need of microcomputers in cars that it makes.
