Research And Implementation Of Mobile Smart Home System Based On WiFi

With the rapid development of network technology and the more quality of lifethat people demand, here comes the vigorous development of Smart Home. Meanwhile, as the popularization of smartphone and the development of 4G network, the information center of human transfers from comp uter to smartphone, which makes the combination of Smart Home and smartpho ne will be the inevitable trend. Generallyspeaking, basing on the wireless technology, the traditional Smart Home system views home network as the control center and controls equipment through web page. However, it is difficult for all the equipment to work independently, and also hard to meet the demand of people's real-time monitoring requirements.This design uses smart phones as the control terminal. It accesses the web server of built-in embedded device through Wi Fi, controlls the smart devices directly without the transfer of gateway, and builds a Smart Home system which is simple to connect, easy to expand and use.Firstly, this paper studies the physical layer key technologies of 802.11 ah protocol applied to the Internet of Things, analyzes and verifies t he transmission performance of the protocol. And then, this paper proposes a quick mobile phone configure method of equipment network access by the studies of UDP transport protocol and m DNS services' s working principle. This method uses UDP header to encode and transport data, simplifying the process of access network. In order to encrypt the transmission data in the configuration process, an efficient encryption algorithm based on advanced XOR is proposed, which improves the security of the system. Finally, the thesis completes the embedded software development of intelligent device based on CC3200 wireless micro controller of Texas Instruments Company, including UDP packet parsing and decryption algorithm, m DNS server and embedded web server software desi gn. Fulfills the software design and implementation of smart home mobile client based on i OS system. Completes data encryption algorithm. Designs the local database based on i OS Core Data technology, and builds the communication between mobile phones and devices utilizing Bonjour technology and HTTP requests.This article does the corresponding test aiming at the system function, the equipment power consumption, communication quality and the resource occupation of running mobile phones. The results show tha t the system is stable and reliable for completing the access network function of equipment, remote monitoring and so on. It indicates that the system has a certain application prospect in the market.