基于蓝牙指纹定位的智能钥匙扣设计

Design of smart key chain based on Bluetoothfingerprint localization

为了解决生活中经常找不到钥匙的问题,设计基于STM32及蓝牙定位技术的智能钥匙扣。智能钥匙扣设计采用STM32作为主控芯片,结合GPS模块和蓝牙模块实现钥匙扣查找功能。使用基于蓝牙指纹的接收信号强度指示(RSSI)定位算法实现在室内或近距离情境下对钥匙扣的精确定位。同时支持一键报警功能,保证老人和小孩的安全。通过近场通信(NFC)功能使钥匙扣替代门禁卡的功能,实现门禁卡与钥匙扣“二合一”。

To solve the problem that the key can not be found in our life,the smart key chain based on STM32 and Bluetooth positioning technology is designed.The smart key chain design uses STM32 as the main control chip,combined with GPS module and Bluetooth module to realize the key chain search function.The RSSI location algorithm based on Bluetooth fingerprint is used to locate the key chain accurately in indoor or close range.At the same time,it supports one button alarm function to ensure the safety of the elderly and children.In addition,through near field communication(NFC)function,the key chain can replace the function of access control card and realize the“two in one”of access control card and key chain.