The Research And Design Of Communication Gateway For Wireless Sensor Networks

In recent years,wireless sensor network technology continues to develop,and become oneof the hot spots in the field of information.Wireless sensor network has been widely used in agricultural production,medical system,ecological monitoring and industrial safety field with its unique low power consumption,self-networking,self-healing ability and so on.The wireless sensor network(WSN)is a wireless network composed of a large number of sensor nodes deployed in a certain area in an autonomous and multi-hop manner.They can collaboratively perceive,collect,process and transmit all kinds of information that needs to be perceived in the network coverage area,and finally transmit the data to the remote control center for comprehensive analysis and processing.The wireless sensor network as a personal area network,the use of the network protocol and the Internet using the TCP/IP protocol is not compatible,which requires a communication gateway to wireless sensor network data collection,translation and forwarding.This paper first analyzes the overall system architecture of wireless sensor networks using Zigbee protocol.The function and the concrete realization of different levels in the system model are analyzed.At the same time introduced the Zigbee protocol framework,networking and network topology.Aiming at the shortcomings of the single gateway architecture of wireless sensor networks,a multi-gateway data transmission scheme is proposed.Then the wireless sensor network node programming,to achieve the node ad hoc network,data acquisition and transmission functions.Then,when designing the communication gateway for Zigbee wireless sensor network,STM32 MCU is used as the gateway main controller,and the gateway hardware module is selected and designed,and the gateway is debugged in kind.At the same time to complete the gateway software program preparation work.Gateway through the carrying Ethernet,Wi-Fi,GPRS and other network protocol conversion module to meet the Zigbee network to the needs of the Internet.Finally,the use of QT prepared the host computer software.The host computer can summarize the temperature and humidity data collected by Zigbee wireless transmission network.At the same time with the My SQL database to collect the data stored,and the preparation of the server program for the mobile terminal to collect the environmental information query display.The joint test of the various functional modules of the wireless sensor network system using Zigbee protocol shows that the parts of the system can run normally and complete the expected functional requirements.Wireless sensor network can complete the collection oftemperature and humidity data,and through the design of the gateway sent to the host computer software for comprehensive analysis and processing.