As the core technology of Bluetooth 4.0 and above,Bluetooth BLE has become the core communication technology of smart home based on the core advantages of low power consumption,high stability and high security.Different from the traditional classic Bluetooth,Bluetooth BLE focuses on small data volume and low energy consumption transmission scenarios,which enables smart devices to run stably on conventional batteries for a long time.In the field of smart home,Bluetooth BLE technology deeply adapts to smart door lock equipment,replaces the traditional mechanical key unlocking method,and realizes the functions of non-inductive unlocking and intelligent control of mobile phones,which is the mainstream intelligent upgrade scheme of domestic smart door locks.
 

The whole Bluetooth BLE smart door lock scheme adopts modular architecture design,which is divided into three core modules to realize stable unlocking and intelligent management.First,the intelligent terminal control module,which relies on smart devices such as mobile phones to carry exclusive clients,is responsible for establishing communication with the Bluetooth BLE module of door locks,and identifying and executing user unlocking and equipment management and control instructions;Second,the core module of door lock execution,with built-in Bluetooth BLE communication unit,is the hardware core of the scheme,accurately docking terminal signals and completing the execution of mechanical instructions such as unlocking and locking;The third is the background management module,which mainly undertakes the background configuration work such as door lock initialization,password modification and permission setting to ensure the long-term stable operation of the equipment.
 

Bluetooth BLE smart door lock application scheme is equipped with domestic highland barley RISC-V multi-mode wireless SoC CH584 chip,relying on self-developed RF radio frequency,baseband algorithm and protocol stack technology to realize software and hardware collaborative optimization,with faster response speed and lower energy consumption.Bluetooth BLE chip adopts single-chip integrated design,which replaces the traditional master+transceiver dual-chip architecture and integrates multiple functions such as Bluetooth BLE,NFC,touch sensing,segmented LCD,etc.The peripheral circuit is simplified and the integration level is greatly improved.The hardware configuration is equipped with 78MHz main frequency,512KB ROM and 96KB RAM,which supports zero waiting operation.At the same time,a 2.4GHz RF transceiver unit is built in,with a receiving sensitivity of-95dBm and a programmable transmission power of+4.5dBm,which can achieve a high-frequency reporting rate of 8kHz and adapt to various complex usage scenarios.
 

In the application of smart door locks,Bluetooth BLE has multiple practical advantages.Ultra-low power consumption features adapt to the door lock dry battery power supply mode,and the energy consumption in all stages of equipment standby,broadcasting and data transmission is extremely low,effectively prolonging the service life of the battery.The compatibility is extremely strong,and it is suitable for all Bluetooth modules of smart phones in the market.Users don't need complicated operations,and they can quickly unlock the phone by turning on Bluetooth and APP,which is convenient and efficient.At the same time,Bluetooth BLE technology has excellent anti-interference performance,which can weaken the influence of signal interference in 2.4G frequency band,and has stable transmission and rapid unlocking response.The security layer relies on the exclusive Bluetooth communication protocol,supports customized encryption keys,realizes one-to-one encrypted communication between devices,effectively avoids the risks of data theft and signal cracking,and fully guarantees home security.

Keywords:Bluetooth BLE