Design Of Smart Home System Based On ZigBee And WIFI

With the development of science and technology and the improvement of economic level,the relationship between people's life,work and information communication is becoming closer and closer.The development of social informatization not only changes people's living habits and working styles,but also puts forward higher requirements for people's traditional family housing and living environment.Smart home equipment is gradually favored by people.In this paper,the smart home system as the research object,ZigBee and Wi-Fi smart home system research and design,using a three-tier architecture for the perception layer,network layer and application layer were designed.A multi-sensor data level fusion algorithm is designed for the data acquisition of home environment to get the more accurate data value of home environment.The main contents of this paper are as follows:(1)the requirement of smart home system is analyzed,and the wireless transmission mode in the system is selected.Based on the architecture of the Internet of things,the smart home system is designed as a three-layer structure of the perceptual layer,the network layer and the application layer.(2)the hardware of the ZigBee network in the perceptual layer and the STM32 intelligent gateway in the network layer in the smart home system are designed.(3)designing system communication protocol and application software.Design a complete multi-layer communication protocol to meet the collection of data and control information in each layer of two-way transmission requirements,and the system awareness layer of the ZigBee network,the network layer of the STM32 intelligent gateway software design.(4)aiming at the data level fusion of the smart home,the purpose and function are explained briefly,and the better effect of the greenhouse intelligent control is obtained by improving the accuracy of the sensing environment data.An adaptive weighted fusion algorithm based on support degree is designed.Through the simulation experiment,the fusion result obtained by this method is verified finally,the change range is small,the accuracy and the stability are good,and it is suitable for the data level fusion of the smart home system.(5)the software of the network layer server(PC)of the smart home system is designed from the interface of the host computer,the function of the host computer and the SQL Server database.For the application layer App,from the interface design and functional design software design.