该文档主要介绍了一种GPS定位终端设备所采用的通信协议-天琴协议，里面详细介绍了有关天琴协议解析的具体说明，是从事GPS/BDS车辆监控管理系统开发的重要参考资料。(This document mainly introduces a communication protocol used in GPS positioning terminal equipment, the Tianqin protocol. It details the specific explanation of the T