1939协议

代码说明：

  J1939是SAE（美国汽车协会）定义的基于CAN总线的规范，目的是解决不同发动机厂商、不同ECU厂商的兼容性问题。一般运用于大型车辆。(J1939 is a specification based on CAN bus defined by SAE (American Automobile Association), aiming at solving the compatibility problem of different engine manufacturers and different ECU manufacturers. Generally used in large vehicles.)