基于nRF24L01的无线温湿度检测系统设计 - 图文

浙江万里学院

本科毕业设计(论文)

(2014届)

论文题目 基于

nRF24L01的无线温湿度

检测系统设计 (英文) Design of Wireless Temperature and Humidity Detection System Based on nRF24L01

所在学院 电子信息学院 专业班级 电气工程及其自动化101班 学生姓名 陈树源 学号 2010013827

指导教师 郑子含 职称 副教授 完成日期 2014 年 4 月 20 日

1 基于nRF24L01的无线温湿度

检测系统设计

陈树源

（浙江万里学院电信学院电气101班）

2014年4月

2 摘 要

温湿度是一个非常重要的参数。在工业、医疗、军事和生活等许多地方，都需要用到检测装置来测量温湿度。随着现代社会的告诉发展，传统直接布线测量方式已无法再满足现状，特别是在某些环境恶劣的工业环境和户外环境，通过直接布线测量显得苍白而无力，因此无线温湿度检测技术应运而生。

本设计主要由主控模块、无线传输模块、温湿度监测系统、显示模块、时间模块、电源模块等组成。并通过对各种类模块进行对比和筛选，挑出比较适合该设计的模块。主控模块采用单片机STC89C51，温湿度模块采用SHT11温湿度传感器，无线传输模块采用nRF24L01,时钟芯片采用DS12C887，显示模块采用液晶LCD1602。单片机通过时钟模块获取时间数据，对数据进行处理；温湿度传感器采集温湿度信号送给单片机处理；单片机通过无线模块再把时间数据和温湿度数据发送到PC端，在显示模块上显示数据。整个系统实现了实时监控环境温湿度的功能。

关键词：温湿度；STC89C51；SHT11；nRF24L01

3 Abstract

Temperature and humidity is an important parameter. In many parts of the industrial, medical, military and other life, you need to use the detector to measure the temperature and humidity. With the development of modern society tells traditional direct measurement wiring can no longer meet the status, especially in some harsh industrial environments and outdoor environment, through direct measurement wiring looked pale and weak. Therefore, wireless temperature and humidity detection technology came into being.

Primarily by the design control module, wireless transmission module, temperature and humidity monitoring system, display module, time module, power modules and other components. And through various types of modules for comparison and selection, pick more suitable for the design of the module. Master module using SCM STC89C51, temperature and humidity module using SHT11 temperature and humidity sensors, wireless transmission module using nRF24L01, clock chip DS12C887, using liquid crystal display module LCD1602. SCM data obtained through time clock module, for data processing; temperature and humidity sensors collect temperature and humidity signal to the microcontroller processing; microcontroller through a wireless module and then the temperature and humidity data and time data is sent to the PC side, the data displayed on the display module. The function of the whole system to achieve real-time monitoring of temperature and humidity.

Key Words: Temperature and humidity; STC89C51; SHT11; nRF24L01

4 目 录

1 引言 .......................................................................................................................... 6 2 总体设计 .................................................................................................................. 7 2.1方案论证及比较 ................................................................................................. 7

2.1.1主控模块的选择 .......................................................................................... 7 2.1.2.温湿度检测系统的选择 ............................................................................. 8 2.1.3.无线发射模块的选择 ................................................................................. 9 2.1.4.显示模块的选择 ....................................................................................... 10 3 系统硬件设计 .......................................................................................................... 12 3.1 单片机主控模块 ............................................................................................... 12 其功能和特点 ....................................................................................................... 12 3.2 无线射频模块NRF24L01 ................................................................................ 13 3.2.1 NRF24L01引脚功能 ................................................................................... 14 3.2.2 工作模式 ..................................................................................................... 14 3.2.3 NRF24L01模块与单片机的连接原理图 ..................................................... 15 3.3 温湿度传感器 SHT11 ....................................................................................... 16 3.3.1 SHT11温湿度传感器的基本原理 ............................................................ 16 3.3.2 SHT11与单片机的管脚连接原理图 ........................................................ 17 3.4 显示模块 ........................................................................................................... 18 3.4.1 LCD1602的引脚 ........................................................................................ 18 3.4.2 LCD1602与单片机的连接图 .................................................................... 19 3.5 电源模块 .......................................................................................................... 19 4 系统软件设计 .......................................................................................................... 20 4.1 主程序流程图 .................................................................................................. 20 4.2 NRF4L01数据发送子程序 ............................................................................... 20 4.3 NRF4L01数据接收子程序 ............................................................................... 22 4.4 温湿度采 …… 此处隐藏：4005字，全部文档内容请下载后查看。喜欢就下载吧 ……