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China, as a large agricultural country, improve production efficiency and technology for agricultural development is very important. Greenhouses as an important part of modern agriculture , it is designed to discipline wide , high technology content , can greatly improved crop yields and production efficiency , therefore, raise the level of the greenhouse industry on the development of modern agriculture has great strategic significance. Intelligent greenhouse is the advanced type of facility agriculture , it has integrated environmental control system, using the system can accurately capture the various parameters of the greenhouse . Wireless sensor networks as an environmental monitoring system, has its unique advantages, it combines sensor technology , information processing technology and network communication technology , its fast layout , strong invulnerability , monitoring , high precision, large coverage area , low cost , etc. advantages , making it ideally suited for applications in the smart conservatory measuring systems. ZigBee is a simple to use , inexpensive, affordable transfer rates , low power short-range wireless communications technology , it is particularly suitable for data throughput is small, easy field wiring long distance , data collection covering a wide area , they frequent battery replacement or charging agri-environmental monitoring and control systems. This thesis is based on ZigBee wireless sensor network technology and techniques to study greenhouse measurement system , mainly to complete the following tasks: sensor node hardware design : Select ATmega128L as microprocessors , CC2420 RF transceiver chip is , LED modules , the node ID module , external memory and other peripheral circuits. They constitute the RF processor boards. Select the temperature and humidity , barometric pressure , light, gravity of these four digital sensors, which together constitute a power management unit data acquisition board . Also designed for programming communication circuit board. Processor RF board and data acquisition boards, programming communication board connector through 51 , schematics and printed circuit board through Prote199SE software design. Sensor node software design : given node -to-node communication software design , including the CC2420 initialization process , data transmission and data reception program design. By transplanting MpZBeeV1.0-3.6 build ZigBee protocol stack star network, for star network networking analysis, and design the main star network .
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