Relay Control and Solenoid Lock Operation: Upon successful fingerprint authentication, the Arduino board sends a signal to control the relay module, which in turn switches the power supply to the ...

Components Needed:** Arduino board (e.g. Arduino Uno) Adafruit R307 fingerprint sensor 20x4 LCD I2C module 6 solenoid locks Jumper wires Fingerprint Sensor Connections: Connect the fingerprint ...

The SIM800L module ensures the encrypted transmission of data between the door lock system and users' mobile devices, providing secure and dependable communication. By integrating Arduino, fingerprint ...