Wireless Smart Lock System Based On 433MHz Frequency And WiFi Technology

With the development of science and technology, intelligent lock as an important part of intelligent Home Furnishing, attracts more and more attention. In the current with information technology, how to protect property security and make the door lock more convenient and intelligent, has become the focus in current research.Wi Fi technology as an important wireless communication technology, has become the first choice of wireless communication technology. The mobile terminal such as Iphone, IPad,connect with AP through WiFi wireless signal, provide wireless broadband service for users. The advantage of WiFi is that support almost all of mobile terminals,and the transmission speed is fast and widespread, is the highest use rate among the wireless network communication technology; the disadvantage is the high power consumption and poor ability to penetrate the diffraction signal, thus cannot completely satisfy the needs of wireless intelligent lock system. The 433 MHz band is a free application for ISM band,the wireless module which is developed base on this band has many advantages such as long communication distance, good anti decay ability, signal strong penetrating ability etc.. This topic will combine with the advantage of WiFi and 433 MHz band wireless module, introducing wireless intelligent locks system based on 433 MHz and WiFi technology.This thesis first introduce the communication technology which is commonly used at present, and analysis their advantages and disadvantages; then according to the system requirement, put forward the system scheme; followed by the actual implementation of the system scheme, including the hardware and software design, communication module of the mobile terminal development; finally carries on the test to the inter module communication, network communication. In the design of wireless module focuses on introducing the selection of microcontroller, RF transceiver chip, designing RF transceiver circuit,analysing the communication process and the realize of specific communication. In the development of the client, introduced the PC client and the Android client development environment separately, analysis of the data communication process and describe the corresponding functions combined with specific interface.This thesis present a wireless smart lock system which is based on 433 MHz and WiFi technology,effectively uses the mobile terminal, the user can open the door through only one key in mobile terminal; through the PC client monitoring the action of gate lock real-time, carries on the management to the credit card information, and prevent the stealing behavior effectively.