Design And Implementation Of Wireless Sensor Network Gateway Based On 6LoWPAN

Wireless sensor networks(Wireless Sensor Networks,WSN),as one of the key technologies in the 21 st century,have been widely researched and applied.WSN plays an increasingly important role in many application scenarios such as medical,agriculture,environmental monitoring and smart metering.As a low-rate,low-power protocol,IEEE 802.15.4 has aroused widespread attention in the field of wireless sensor networks at home and abroad in academia and industry.Obviously,the integration of wireless sensor networks into the Internet will play an important role in the development of the Internet of Things,and the potential of wireless sensor networks will be fully released.6LoWPAN is regarded as one of the ideal technologies to realize the connection between wireless sensor networks and the Internet,which is the key to building the Internet of Things.The main work of this article is to design and implement a complete 6LoWPAN monitoring system,which can be applied to smart homes,greenhouses,environmental monitoring,logistics monitoring,medical health,etc.First,a brief introduction to the 6LoWPAN system architecture,and then on the basis of understanding the wireless sensor network and 6LoWPAN related theories,through the wireless sensor network network topology analysis,combined with the 6LoWPAN protocol stack model,this topic research based on 6LoWPAN wireless The architecture of the monitoring system.The system adopts a three-layer architecture consisting of on-site monitoring area,6LoWPAN gateway and monitoring system.The on-site detection area uses ZigBee technology to build a wireless sensor network,and the nodes communicate with each other by forming a mesh network topology.The 6LoWPAN gateway is implemented by STM32 and W6100.STM32 as the host computer sends data and command information through the SPI interface,W6100 as the Ethernet protocol stack chip to achieve interconnection with the Internet.The monitoring center uses a powerful serial tool ScriptCommunicator to send and receive data.At the end of the thesis,the network topology is constructed by capturing packets with a packet capture tool and analyzing the transmission path of node information.Use the PING command to test the connectivity of the IPv6 address obtained by the Ethernet module through DHCP.And the entire system was built and the system was functionally tested.The test results show that the wireless monitoring system meets the design requirements and expected functions,and the information collection,transmission,and display are well achieved.The system has the advantages of wireless,miniaturization,high efficiency and low cost,which has certain application value and practical significance.