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 ...

A detailed tutorial on interfacing the modules and using the library is available on my project website : https://circuitstate.com/tutorials/interfacing-r307-optical ...

The project consists of the AVR microcontroller Arduino uno r3, the fingerprint module R307, and the GSM Module sim800L. The fingerprint Module R307 can store up to 127 fingerprints. once the ...