Freediag contains various drivers (ISO9141, ISO14230, SAEJ1850-VPW, SAEJ1850-PWM) for different adapters that connect the PC serial port to a vehicle. It reads vehicle diagnostic info from vehicle electronic control unit (ecu). The source code is com

K线通信协议中文精华版及源码示例，只是概述，详细的请查阅ISO14230-K-line communications protocol that the Chinese version of the essence and source code examples, just an overview, details, please consult ISO14230

ISO 14230-3-1999 道路车辆.诊断系统.关键词协议2000.第3部分 应用层 车联网开发，参考。(ISO 14230-3-1999 for telematics Road vehicles-Communication between vehicle and external equipment for emissions-related diagnostics)