基于SHT71的温湿度无线远程监控系统

针对温室大棚的温湿度采集，提出了一种无线远程系统设计方案，介绍了系统结构和软硬件设计．系统以HT46R24单片机为节点控制核心，采用了数字式微型智能传感器SHT71，通过GSM网络与上位机进行无线数据通信．当温湿度出现异常时，启动语音报警功能，控制通风装置进行环境温湿度调节．上位机软件采用VB6．0编写，实现了与温湿度采集节点的数据通信以及对采集到的数据进行处理、储存、分析等操作．实验表明，系统运行稳定，具有很好的环境适应性．

Wireless Remote Monitor System of Temperature and Humidity Based on SHT71

A scheme to implement the wireless remote monitor system of temperature and humidity for greenhouse was put forward. The structure of the system and the key techniques of hardware and software design were introduced. Using a micro intelligent sensor SHT71 which was controlled by HT46R24,the temperature and humidity could be measured by monitor terminal,depending on GTM900 module to communicate with the upper personal computer through GSM wireless net. When abnormal circumstance happened,the audio alarm system could be enabled to broadcast the alarm contents and the ventilation device was activated to regulate environmental temperature and humidity. The upper PC software was programmed by mean of VB 6.0 and could communicate with the temperature/humidity controller node to implement the data processing,storage and analysis operation. Results show that this system needs no calibration and has good environment adaptability.