R307 Finger Print Sensor Module – Optical Biometric Scanner with UART Interface

The R307 Finger Print Sensor Module is an optical biometric scanner that captures high-resolution fingerprint images for identity verification. It integrates a powerful DSP and a large-capacity fingerprint library, making it suitable for access control, time attendance, and security projects. With its fast matching speed and low power consumption, it is a reliable choice for embedded applications.

Key Specifications

What You Can Build With This

• Biometric door lock system using Arduino and solenoid
• Employee attendance tracker with real-time clock and LCD
• Secure safe locker that opens only for authorized fingerprints
• PC or device login authenticator to replace passwords

Compatibility

This module works seamlessly with any microcontroller that has a UART interface, such as Arduino Uno, Mega, Nano, or Raspberry Pi. It supports both 3.3V and 5V logic levels, so no level shifting is required for most boards. The Adafruit Fingerprint Sensor Library for Arduino provides ready-to-use examples for enrollment and matching.

Wiring Notes

Connect the module’s TX pin to the microcontroller’s RX, and RX to TX. Supply 3.3V or 5V depending on your board’s logic level. For long cable runs, add a 10K pull-up resistor on the data lines. Avoid touching the sensor window with bare fingers to maintain image clarity.

Why Buy from Compoden

Every component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-5 days. If defective on arrival, replace within 7 days.