The control system consists of a master node and several slave nodes connected by a bus; the master node is arranged in the car such as the co-pilot center console, and the slave nodes are arranged on the doors, generally one each for the left door, right door, and rear door, or installed at both ends of the B-pillar and in the upper middle position of the front and rear windshields; when the mobile phone establishes a connection with the master node and authenticates successfully, the slave node is awakened, and the slave node begins to report the RSSI value of the mobile phone through the bus, and the RSSI data is summarized and sent to the APP for processing; when the mobile phone is disconnected, the system goes into sleep mode, and the master node continues to wait for the next connection of the mobile phone.

Passive keyless entry: When the user approaches the vehicle within a certain range, the car will automatically unlock and start, and set the seat, rearview mirror, etc. according to preferences.
Key sharing: Users can share keys with family and friends and authorize them to use the vehicle. Terminate or suspend the use of digital keys. When the user determines that he or his friends no longer need to use the vehicle or the mobile device is lost, he can terminate or suspend the operation. Termination is a permanent operation. If you need to use it again, you need to share a new digital key; suspension is a temporary operation and can be resumed later.
VLG Bluetooth digital key antenna adopts circular polarization, small size, high gain, strong anti-interference, safe and reliable, can realize remote control of the car, and is currently in mass production in well-known brand models.