Research And Design Of Smart Home System Based On Wireless Sensor Network

In order to realize safe,comfortable,convenient and energy-saving home life of people and meet their individual needs of home environment,the smart home system combines hightech means,such as automatic control,data communication,sensor and network.Studying the smart home system has far-reaching significance on improving the quality of human life and building energy-saving smart city.In this paper,the author designed a smart home system based on wireless sensor network from the point of practicability,energy-saving and convenience.The main work of the paper is:Firstly,the advantages and disadvantages of the existing smart home system are analyzed.According to the technical requirements of the system,a smart home system structure based on wireless sensor network is designed,which has three hierarchical structures.The upper network includes computers,mobile phones,flat and other remote terminals,which can access,control smart home system with permission.The middle layer is composed of ZigBee-WiFi intelligent gateway,which is responsible for the information interaction between ZigBee network and Wi Fi network.The lower layer is ZigBee wireless sensor network,which is responsible for the formation of wireless sensor networks,data collection,forwarding and so on.Secondly,it achieved the design of hardware system and software system respectively.With RT5350 chip as the core of WiFi module and CC2530 chip as the core of ZigBee module,it composed of intelligent gateway,using the OpenWrt routing system.It designed hardware and software of ZigBee terminal and data acquisition module in the wireless sensor network.It designed ZigBee module and WiFi module between the serial packet format,and used the Android development platform to design mobile phone end of the APP monitoring software,which achieved the remote control of smart home system.Finally,the experiment platform of smart home system is set up to verify the overall function of it,and to test the communication function of the systematic WiFi network and ZigBee network.To make sure the performance of the system meeting requirements of smart home system,the interference between ZigBee and WiFi network was analyzed,and the frequency agility algorithm was used to solve the problem of co-channel interference.