The R307 Optical Fingerprint Sensor is a professional-grade, all-in-one biometric module designed to add secure identity verification to any project. At Electrapac, we recommend the R307 for its high-speed image processing and its ability to store and verify fingerprints internally without needing an external database.

Product Overview

The R307 is an integrated fingerprint verification module that combines an optical path, a high-performance DSP (Digital Signal Processor), and an onboard flash memory. It can operate in two modes: 1:1 Matching (verifying a specific user) and 1:N Search (identifying a user from a large group). With its dual-interface design (UART and USB), it is as easy to connect to a Windows PC as it is to an Arduino or ESP32.

Key Features for Electrapac Customers

• Integrated Image Buffering: The module automatically handles image capture, feature extraction, and template generation, outputting simple "Success" or "Fail" signals to your microcontroller.

• Dual Interface Connectivity: Use the UART (Serial) pins for microcontrollers or the USB interface for direct integration with attendance software on a computer.

• Onboard Database: Stores up to 1,000 fingerprints directly on the module’s internal flash memory, ensuring data is retained even if the power is disconnected.

• Self-Learning Algorithm: The R307 features a sophisticated algorithm that updates the stored template over time, improving recognition accuracy as the user's finger placement changes.

• Compact & Rugged: The optical glass is scratch-resistant and designed for high-traffic use in offices or industrial environments.

Wiring & Integration Guide

The Electrapac R307 typically uses a 6-pin connector. For most DIY projects using an Arduino, you only need four wires:

1. VCC (Red): 5V DC Power.

2. GND (Black): Ground.

3. TXD (White): Transmit Data (Connects to MCU RX).

4. RXD (Green): Receive Data (Connects to MCU TX).

5. Touch (Yellow): Sensing pin (Optional - used to "wake up" the MCU when a finger is detected).

Pro-Tip: When using the R307 with an Arduino, we recommend using the Adafruit Fingerprint Sensor Library. It includes easy-to-use examples for "Enroll" (registering a finger) and "Fingerprint" (verifying a user).

Primary Applications

• Biometric Door Locks: Creating secure, keyless entry systems for homes or lockers.

• Attendance Systems: Tracking employee or student clock-in/out times without ID cards.

• Safe Boxes: Adding a biometric layer of security to private storage or drawers.

• User Authentication: Restricting access to sensitive machinery or computer terminals.

• Vehicle Ignition: Building a "Fingerprint-to-Start" system for cars or bikes.

Why Shop at Electrapac?

We supply the Genuine R307 Optical Sensor to ensure high-resolution imaging and fast matching speeds for your security projects. Visit us at www.electrapac.com for the biometric solutions that protect what matters most.