Bluetooth Digital Car Key Solution

With the development of the Internet of Vehicles and the maturity of Bluetooth technology and the improvement of people's quality of life, mobile phones have become a necessity for people to travel while bringing convenience to people. The majority of drivers will carry physical car keys when they go out, and once the car keys are forgotten or lost, it will bring a lot of inconvenience. In order to solve this problem, major car companies and Tier1 manufacturers have begun to be equipped with a keyless entry system (Keyless Entry System) and a digital car key based on Bluetooth communication (Digital Key), bringing car owners a different car experience.

As the carrier of the car key, the mobile phone is used as the third key of the vehicle. The application of the current high degree of security, close field good NFC technology and Bluetooth technology close cooperation, Bluetooth module and mobile phone Bluetooth communication. The user installs the APP or WeChat Mini Program provided by the car manufacturer or Tier1 manufacturer that contains the Bluetooth key function, registers and activates the bound vehicle and authenticates. In the application, after the driver (carrying a successfully registered mobile phone) reaches a certain distance from the vehicle, the owner does not need to take out the mobile phone, as long as the authorized smart phone is close to the door, the vehicle is actively unlocked, and after entering the car, press the engine start switch, and the vehicle can start. After the owner carries the mobile phone away from the vehicle to a certain distance, the Bluetooth module automatically disconnects from the mobile phone and automatically locks the car.??

Solution Introduction:

* Consists of a master module, a slave module (mobile phone or expanded to a Bluetooth key) and several satellite modules.

* The master module is arranged in the car, and the satellite module is arranged on the door, generally one on the left side, one on the right side and one on the rear.

* When the slave module approaches the car, the master module actively establishes a connection with the slave module. After connecting, the master module will wake up the satellite module, and the satellite module will get the RSSI value.

* After the master module fuses the RSSI data provided by the satellite module, it can determine which door should be opened.

* When the slave module leaves, the connection between the master module and the slave module is interrupted, the system sleeps, and the master module continues to wait for the slave module to enter the control range.

Recommended modules: FSC-BT616, FSC-BT616V, FSC-BT618V