Development And Research On Temperature And Humidity Monitoring System Based On Wireless Sensor Network

Wireless temperature and humidity monitoring system based on wireless sensor networks, using the emerging ZigBee technology, sensor selection of high reliability digital temperature and humidity sensors, combined with GPRS data transmission, with easy installation, energy-saving, high reliability, convenience check and so on. And have the sound and light alarm and SMS alarm. People and interactions to provide 3.5-inch LCD screen, keyboard and so on. Data centers provide a powerful data processing capabilities, user-friendly queries.Hardware using Texas Instruments CC2430 chip main control chip, the sensor uses the company's SHT11 Switzerland Sensirion digital temperature and humidity sensors, remote transmission using the SIM300 module (GPRS), equipped with the hardware functional circuit, the completion of data acquisition, display and remote transmission function .Software divided into three layers, bottom-driven functions, utility functions and upper logic. Only low-level driver functions directly related to hardware, including the operation of the registers and some hardware initialization, functions of functions and the upper logic does not rely on the master chip. This design has the advantage of the event of a system upgrade, we only need to change the hardware package of low-level driver functions can be, and without the need for all of the software components have to re-write. The software framework of the construction to make ideas more clear, more modular and clear, so that the maintenance of software system is also easier to upgrade the system is also more convenient.Of software processes on the part of the program has done a flowchart description of the communication protocol also made a corresponding statement.Remote Data Monitoring Center providing powerful data processing functions, including real-time monitoring, historical data query, the curve features, expert data processing, export excel reports and other functions. The use of any one computer access to wide area network can be easy to achieve the above functionality.Wireless Temperature and Humidity Monitoring System for the advantage of wireless, using wireless sensors and low power consumption, you can use battery-powered, which determines the system with easy installation, networking and flexible features.