The Design Of Smart Home System Based On WiFi Wireless Gateway

With the continuous innovation of science and technology,people's demands for efficiency,comfort and safety of their living environment are becoming more and more demanding.Therefore,smart home gradually formed a larger potential market in china,it is a typical application of Internet of things,and has a good prospect of application.This paper analyzes the current situation of smart home system,in view of the current market demand,a smart home system based on WiFi wireless gateway is designed and implemented.The Smart Home System consists of three parts: WiFi gateway,mobile terminal and terminal data acquisition device,the STM32F103RDT6 processor with ARM Cortex-M3 kernel is the hardware platform,transplant the uC/OS-II operating system to the LwIP protocol.First of all,the WiFi gateway peripheral ZigBee coordinator,Ethernet,infrared module embedded design,it is combined with the environment control system and infrared monitoring system in home to form a Network system.Secondly,the design of mobile terminal adopts the method of structured design,the use of MyEclipse9.0+JDK1.7 development tools in the SQL Server 2008 database to complete the smart home APP software control interface design.Finally,the ZigBee sensor and infrared sensor are designed for the terminal data acquisition device,because the ZigBee sensor node cannot be aligned with the home network address,so different frame formats are defined in the ZigBee sensor,it is easy to recognize the received data;The infrared module adopts the way of software coding and decoding,and sends the infrared encoded signal to the WiFi gateway after parsing and encapsulating,complete the infrared module data transmission control.The design of smart home system software adopts the idea of hierarchical design,the whole system is divided into four parts: WiFi gateway and its main peripheral interface circuit driver,all kinds of terminal sensor node drivers,embedded uC/OS-II system transplantation and human-computer interaction interface APP application program.The ARM core processor of WiFi gateway uses Keil uVision4 integrated development environment,which is used for compiling,linking and debugging of program codes;In the terminal data acquisition equipment,the driver of ZigBee sensor node is the most special,it uses embedded IAR Embedded Workbench development environment.Through the analysis of ZigBee network,Ethernet transmission,data acquisition of ZigBee sensors and remote control of smart home appliances,the test results areanalyzed.The Smart Home System based on WiFi wireless gateway not only realizes data acquisition and real-time monitoring of the internal environment of the home,and the success of the interior of a variety of intelligent equipment organically combine to achieve overall management,through the mobile terminal APP software to realize the remote control and access of the smart home appliances inside the home.Therefore,this design gives a certain reference value to the popularization of smart home in the future.