Research On Intelligent Door Lock System Based On IEEE802.11 Standard

With the rapid development and application of Internet of things technology,various intelligent electronic products appear in the market of intelligent home,and intelligent home also become the mainstream lifestyle in future.In the system of intelligent home,The door lock is the first important line of personal property security,so the most important characteristic of the door lock system is the reliable safety performance.In this paper,a secure intelligent door lock system based on IEEE802.11 standard Wi-Fi technology,embedded control technology and Android application technology is designed and implemented.Based on the safe and convenient requirements of the door lock system in the field of intelligent home,designing an intelligent door lock system using IEEE802.11 standard Wi-Fi wireless communication technology and GSM technology as the communication medium,and using the Android operating system cell phone as the control terminal.The chip STM32F103CBT6 is regarded as the control central,it is equipped with Wi-Fi module,GSM module,power supply management module and other necessary circuits.The circuit design was carried out for each module.All of these are constituted the hardware platform of the intelligent door lock system.After completing the hardware design,then using the strong security AES algorithm,the AES encryption software design for opening lock instruction is realized according to the realization process of the algorithm.Thus it effectively improves the security of system communication.Based On the hardware platform,the door lock control drive and Android intelligent phone software are developed.The door lock control drive is to achieve starting Wi-Fi and the security communication function.It designs the software function of the STM32 chip,Wi-Fi module and GSM module on Keil uvision5 software development platform.After loading the TCP application in the intelligent phone,the Android intelligent phone software will regarded as the system client to control the instruction of the door lock driving circuit.Using the Android intelligent phone to send instructions,the program hardware control platform was loaded to test the functions of each module,and verify the wireless encryption and unlock function of the intelligent door lock system.The verification result shows that the GSM module and the Wi-Fi module achieve a fast communication function,and the entire system achieves the expected function of wireless encryption unlocking.The system realizes double protection and low power consumption.The first protection is Wi-Fi module just works at necessary time.It will avoid the Wi-Fi work long time and prevent the lock door system from being cracked.So the power consumption also is small.The second protection is to encrypt the lock instruction through the AES algorithm,effectively increase the difficulty of the password theft,and the double protection measures greatly enhance the security performance of the intelligent door lock system.