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The designing and porting of temperature &humidity sensor node driver based on ARM-Linux

The places such as greenhouses, grain depot and nuclear radiation measurement require real-time monitoring of environmental temperature and humidity, so a low-cost, low-power wireless temperature and humidity sensor network nodes based on ARM-Linux platform is designed. The paper is analyzing the operating mechanism and timing sequence of DHT11 temperature and humidity sensors in detailed, and studying data format and the processing method of sensor.The DHT11 temperature and humidity sensor node corresponding Linux drivers are programmed, then the temperature and humidity acquisition program porting to the ARM9-Linux2.6.18 platform. Meanwhile, the use of open-source cross-platform QT graphics library, the collected data through the graphical user interface is intuitive feedback to the user. The system has good stability and scalability, and has good application prospects in radiation measurement.