目录
摘 要..................................................................................................................................................3
一． SMS 基本概念和 AT 命令 .....................................................................................................4
1.1 SMS 基本概念..........................................................................................................................4
1.1.1 短消息的体系结构........................................................................................................4
1.1.2 SMS 重要概念.................................................................................................................4
1.1.3 SMS 组成要素.................................................................................................................5
1.1.4 短消息不可到达的原因................................................................................................5
1.1.5 短消息的发送格式........................................................................................................5
1.2 短信 AT 命令介绍 .....................................................................................................................6
1.2.1 ATE：连接测试..............................................................................................................6
1.2.2 AT+CSCA：选择消息中心地址......................................................................................6
1.2.3 AT+CNMI：新消息批示方式..........................................................................................7
1.2.4 AT+CSMS：选择短信息服务..........................................................................................7
1.2.5 AT+CPMS：选择短消息内存..........................................................................................8
1.2.6 AT+CMGF：选择短消息格式..........................................................................................9
1.2.7 AT+CMGR：读短信息......................................................................................................9
1.2.8 AT+CMGS：发送短信息................................................................................................10
1.2.9 AT+CMGL：列出 SIM 卡中短消息................................................................................10
1.2.10 AT+CMSS：从 SIM 内存中发短信息..........................................................................10
1.2.11 AT+CMGW：向 SIM 内存中写入待发短信息..............................................................11
1.2.12 AT+CMGD：删除 SIM 内存中的短信息......................................................................11
二. 系统硬件的具体设计与实现...................................................................................................12
2.1 系统原理和框图.......................................................................................................................12
2.2 功能模块的设计.......................................................................................................................12
2.2.1 单片机介绍..................................................................................................................12
2.2.1.1 AT89C51 管脚说明.............................................................................................13
2.2.1.2 AT89C51 主要特性.............................................................................................14
2.2.1.3 芯片擦除..............................................................................................................15
2.2.2 GSM 手机模块 TC35....................................................................................................15
2.2.2.1 产品特点.............................................................................................................15
2.2.2.2 使用方法.............................................................................................................16
三. 系统软件设计...........................................................................................................................18
1. 程序设计思路.............................................................................................................................18
2. 程序流程图.................................................................................................................................18
3. 程序.............................................................................................................................................19
四. 总结...........................................................................................................................................20
五. 致谢...........................................................................................................................................21
六. 参考文献...................................................................................................................................22
七．附录..........................................................................................................................................23
主程序..............................................................................................................................................23
