目 录
引 言 ...............................................................................................................................1
1 系统结构及工作原理...................................................................................................2
1.1 系统结构 ............................................................................................................2
1.2 系统控制核心——AT89C52 ............................................................................2
1.2.1 单片机的引脚介绍..................................................................................2
1.2.2 单片机内部资源介绍..............................................................................4
1.3 系统工作原理简介 ............................................................................................5
1.3.1 数字温度传感器 DS18B20 ......................................................................7
1.3.2 无线传输...................................................................................................7
1.3.3 LED 显示 ..................................................................................................9
2 下位机部分介绍.........................................................................................................11
2.1 DS18B20 温度采集模块 ..................................................................................11
2.1.1 DS18B20 简介 ........................................................................................11
2.1.2 DS18B20 的测温方法 ............................................................................12
2.2 LED 数码显示模块 ..........................................................................................14
2.3 nRF24L01 无线发送模块.................................................................................17
3 上位机部分介绍.........................................................................................................20
3.1 无线接收模块 ..................................................................................................20
3.2 上位机上的数据显示 ......................................................................................21
4 模块间的通信 .............................................................................................................23
4.1 上位机与单片机的通信 ..................................................................................23
4.1.1 串口通信简介........................................................................................23
4.1.2 PC 机侧 VB 程序 ...................................................................................25
4.2 nRF24L01 与单片机的通信.............................................................................25
4.3 DS18B20 与单片机的通信 ..............................................................................26
5 系统调试 .....................................................................................................................28
5.1 DS18B20 温度采集并显示 ..............................................................................28
5.2 nRF24L01 发送与接收模块调试.....................................................................29
6 总结 .............................................................................................................................31
【参考文献】 .................................................................................................................32
附 录 .............................................................................................................................33
致 谢 .............................................................................................................................46
