R307 Optical Fingerprint Sensor Module – High-Performance Biometric Scanner with Integrated Image Processing and UART Interface for Arduino, ESP32, and Security Systems

Product Description The R307 Optical Fingerprint Sensor Module is an all-in-one biometric solution designed for high-security identification and authentication projects. It combines a high-resolution optical glass sensor with an on-board DSP (Digital Signal Processor) that handles complex image rendering, feature extraction, and template matching internally. The module communicates via a simple UART serial interface, allowing users to enroll and verify fingerprints with basic hexadecimal commands. Capable of storing up to 1000 unique fingerprint templates, it is the industry standard for smart door locks, attendance systems, and ignition control projects. Its high-durability optical lens and advanced algorithms ensure reliable performance even under varying environmental conditions.

Key Features

• Integrated DSP Processing: Handles all fingerprint algorithms on-board, requiring no external library processing for matching.

• Large Capacity Storage: Supports the enrollment and internal storage of up to 1,000 fingerprint templates.

• High-Durability Optical Lens: Features a rugged glass sensor resistant to scratches, impact, and static electricity.

• Flexible Security Levels: Adjustable false acceptance and rejection rates (Security levels 1-5) to suit specific application needs.

• UART Communication: Provides a standard serial interface compatible with Arduino, ESP32, STM32, and Raspberry Pi.

Technical Details

• Optical Sensing Technology: Utilizes high-intensity blue/red backlighting to capture high-contrast ridge and valley details.

• Scanning Speed: Features ultra-fast identification; a 1:N search of the entire database is typically completed in under 0.3 seconds.

• Power Supply Flexibility: Optimized for a stable 5V input, but operates reliably across the 4.2V to 6.0V DC range.

• Template Size: Generates a compact 512-byte template for each fingerprint, optimizing internal flash memory usage.

• Peak Current Management: Draws approximately 40mA during standby and peaks at 50mA during active scanning and image capture.

• Interface Pinout: Standard 6-pin connector including VCC, GND, TX, RX, Touch, and 3.3V (for specific wake-up modes).

• Fingerprint Capture Angle: 360-degree rotation recognition allows the user to place their finger at any angle.

• Environmental Stability: Maintained performance in humidity levels up to 85% and temperatures from -20°C to +50°C.

• Hardware Handshaking: Supports adjustable baud rates via software commands to match high-speed microcontroller communication.

• Image Buffer: Includes internal RAM to store temporary image data during the feature extraction process.

• Security Reliability: Low False Acceptance Rate (FAR < 0.0001%) ensures professional-grade security for commercial applications.

• Status Feedback: The sensing window illuminates during the capture process to provide visual cues to the user.

• Anti-Static Protection: The sensor head is designed to dissipate ESD, preventing damage during physical contact.

• Mounting Design: Features a compact rectangular housing with a flange for easy mounting into custom enclosures or panels.

• Self-Calibration: Automatically adjusts image gain and exposure to compensate for different skin types and moisture levels.