Research And Implement Of Smart Home System Based On Internet Of Things

With the rapid development of science and technology,it has brought great changes to human life.With People's pursuit of life quality has become more and more high,intelligent devices become more widespread.At this moment,smart home system arises.Today,a lot of companies involved in smart home,such as Haier,Gree,they have put forward a set of smart home,their products have some problems,such as high purchase cost,wiring problem,high cost of maintenance and upgrading difficult problem.To solve these problems,this paper proposes a scheme of smart home system based on Internet of things,I solve these problems by using the low cost router instead of gateway and WiFi transmission data and open source operating system.Here are my research:First of all,the intelligent gateway is key part in the smart home system,my main work is cross compiling a more suitable and light smart home gateway system based on the Linux development of OpenWrt routing software platform.It has high degree of modularity and the characteristics of the file system.I program to achieve the connection of different devices and protocol conversion,which includes the sending instructions from the service layer,real-time feedback gateway status,device controlling,status monitoring and dynamic maintenance of equipment information and other functions,at the same time I designed and implemented for the upper and lower layer of the protocol conversion,improve the protocol compatibility,so that smart home gateway be easy to deploy in civilian residential.Secondly,I adopted node layer based on raspberries pie Linux system,using C,Python language to accomplish the upper equipment protocol parsing,underlying equipment control,information aggregation,condition monitoring,real-time dynamic maintenance equipment list and timing control,and other functions.Using open source hardware is very good for the development cost and cycle control,and will not due to the end of a specific chip production cycle change of the whole equipment.Finally,I design the hardware connecting plate between the node layer and the underlying equipment,which can be compatible with a variety of equipment.It can connect multiple forms of GPIO interface,thus for adding different function of the equipment after laid a good foundation.