这个文档详细讲解了在单片机上实现控制GSM模块的格式，对于开发远程通信系统的人员很有用-This document gave a detailed account in single-chip GSM module to achieve control over the format of the remote communication system for the development of personnel is useful

控制系统PPt，详细讲述了控制系统的基本原理和方法-Control system PPt, detailed account of the basic principles and methods of control systems