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With the rapid development of digital communications and computer networks , many short - distance wireless communication theory and standards have been proposed . From GSM. Bluetooth to the Wi-Fi, wireless networks gradually integrated into our daily lives . The advent of the ZigBee technology , opportunities for the development of wireless sensor networks . The wireless sensor network is adopted by many of the same or different sensor nodes network MANET constituted . ZigBee-based wireless network technology to make up for low-cost , low-power , low-rate network blank , and therefore subject to more and more people of all ages . Need for environmental monitoring , ZigBee-based wireless sensor network environment monitoring system . First, the thesis of the ZigBee protocol stack , elaborate data frame structure of each layer in the ZigBee address allocation and routing network construction mechanism , and discusses the ZigBee defined the type of network equipment and network topology . Secondly , the paper design a wireless sensor node control module CC2431 chip as the core , while the design of the air pressure , vibration , temperature , humidity and other environmental parameters collected sensing circuit . On this basis, build the hardware circuit of the sensor network node , and complete production and commissioning of the hardware circuit . Software , design a simple environmental monitoring system software platform ; discuss the network layer and application layer protocol stack implementation , including the formation of the nodes in the network , the node network , the node from the network and data encrypted transmission process ; complete network nodes design, implementation, network formation and dynamic maintenance . Designed based on ZigBee wireless sensor network environment monitoring system has network efficiency, low energy consumption , low production costs , high reliability , high security and other features, environmental monitoring needs to meet a number of occasions , to achieve the expected requirements .
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