本项目的目的是完成一个建立在 TC35i 模块上的短消息协议栈。我给这个协议栈起的

名字是FreeSmsStack。从名字上可以看出，这个协议栈是一个免费的开源协议栈。

短消息业务（SMS）作为GSM 的一种增值服务，随着GSM 网络覆盖范围的不断扩大，

得到了迅速发展，它具有传输速度快，费用低，不占用语音通信通道等优点，因而在远程智

能控制系统中得到了广泛的应用，如：基于GSM 和GPS 的车辆跟踪监视系统，基于GSM

的远程LED 信息发布系统等。-The purpose of this project is to complete a TC35i module based on a short message protocol stack. I give the date of this protocol stack name is FreeSmsStack. It can be seen from their names, this protocol stack is a free open-source protocol stack. Short Message Service (SMS) as a value-added services to GSM, with GSM network coverage continues to expand, has been developing rapidly, it has a transmission speed, low cost, do not take up the advantages of voice communication channels, thus the remote intelligent control system has been widely applied, for example: GSM and GPS-based vehicle tracking and monitoring system for GSM-based remote LED information release system.