SAE J1939 (Network protocol for vehicle applications)

SAE J1939 is a communication standard used in heavy-duty vehicles like trucks and buses to enable electronic systems to exchange information reliably. It defines how various devices, such as engines, brakes, and navigation systems, talk to each other over a shared network. Using specific message formats and communication rules, J1939 ensures all components work together seamlessly, improving vehicle performance, diagnostics, and safety. It operates over the CAN (Controller Area Network) bus, providing a robust, real-time system for complex vehicle functions.