Research of Greenhouse Environment Monitoring System Based on ZigBee

In order to solve the unfavorable factors such as tediousness of traditional cable monitoring site wiring and rearrange if crop needs to change the arrangement,this paper researches greenhouse environment monitoring system based on ZigBee wireless sensor network technology.On the basis of sensing technology, the communication technology and computer technology, wireless sensor network develops into a new information acquisition and processing technology. At present, the ZigBee technology based on IEEE802.15.4protocol standard develops maturely,and greatly promotes the wireless sensor network to practical. The application of wireless sensor network technology to agricultural automatic control also has the feasibility.The proposed greenhouse environment monitoring system realizes real-time monitoring of the temperature, humidity and light intensity by the combination of hardware and software. Wireless sensor network mainly includes coordinator node composed of wireless node module and intelligent motherboard module and sensor collection node composed of sensor node module and intelligent motherboard module.The sensor node communicates with coordinator node by the ZigBee wireless sensor network. Coordinator node is the bridge which connects sensor nodes and computer.It is responsible for networking and concentration monitoring terminal data,and uploads the upper machine through a serial port RS232. Wireless node module mainly consists of Radio Frequency single-chip computer,and the MCU is the CC2530chip, using2.4G carrier frequency and bar antenna. Sensor module has two sensors, which are the temperature and humidity sensor SHT10and the photoelectric sensor BPW34S.Intelligent motherboard module consists of switching power circuit, amplifier circuit, serial port circuit, reset circuit and program control LED display circuit. The software design includes two aspects,which are node control procedure and PC monitoring interface program. Node control program realizes by the C language in IAR Embedo Workbench development environment, including sensor node control procedure and coordinator node control procedure. PC monitoring interface realizes by the C++language in Visual Studio2005development environment. Finally, the feasibility of this design is verifid by the experimental which meets the basic requirements results.