R307 Fingerprint Identification Module Reader Sensor

The R307 Fingerprint Identification Module is a powerful and reliable optical biometric sensor designed for accurate fingerprint recognition in a wide range of security and identification applications. It uniquely integrates both the image collection sensor and the fingerprint algorithm processing chip into a single compact unit, eliminating the need for external processing and making it an all-in-one solution for embedded biometric projects.

Featuring professional optical technology and precise module manufacturing, the R307 captures clean, high-quality fingerprint images at a resolution of 500 DPI. Its built-in finger detection function automatically senses when a finger is placed on the sensor, while its fast 0.2-second scanning speed and 0.1-second verification time make it ideal for real-time applications. The module can store up to 1000 fingerprint templates internally and supports flexible 1:N matching for quick user identification.

The R307 communicates via UART (TTL logic level) or USB 2.0, with a configurable baud rate ranging from 9600 to 115200 bps, making it easy to interface with Arduino, Raspberry Pi, ESP32, STM32, and other microcontrollers. With a working voltage of DC 4.2–6V, low typical current of 50 mA, and a small footprint of just 4.5 × 2.4 × 2 cm, it can be easily integrated into compact end products.

Security is a major strength of this module, offering a 5-level adjustable security setting, an extremely low False Acceptance Rate (FAR) of ≤0.0001%, and a False Rejection Rate (FRR) of ≤1%. These specifications make the R307 highly suitable for access control systems, attendance machines, safety deposit boxes, car door locks, smart home automation, and DIY biometric projects. Users can also conduct secondary development, allowing the sensor to be embedded into a wide variety of custom commercial or industrial products.

Specifications

• Module Type: Optical Fingerprint Sensor
• Backlight Color: Blue
• Communication Interface: USB 2.0 / UART (TTL Logic Level)
• Baud Rate: 9600 bps – 115200 bps (configurable)
• Verification Speed: 0.1 seconds
• Scanning Speed: 0.2 seconds
• Image Resolution: 500 DPI
• Character File Size: 256 bytes
• Template Size: 512 bytes
• Storage Capacity: 1000 fingerprint templates
• Matching Method: 1 : N
• Security Level: 5 levels (1 = lowest, 5 = highest)
• False Rejection Rate (FRR): ≤ 1%
• False Acceptance Rate (FAR): ≤ 0.0001%
• Operating Voltage: DC 4.2 – 6V
• Working Current: 50 mA (typical)
• Peak Current: 75 mA
• Operating Temperature: -20°C to +50°C
• Image Capture Surface: 1.5 × 1.1 mm
• Overall Size: 4.5 × 2.4 × 2 cm (1.77 × 0.94 × 0.79 in)
• Cable Length: 15 cm

Applications

• Access Control Systems – Secure entry for doors, gates, and restricted areas
• Attendance Machines – Reliable employee and student time tracking
• Safety Deposit Boxes – Biometric protection for valuables and documents
• Car Door Locks – Keyless biometric vehicle access
• Smart Home Automation – Personalized control of locks, lights, and devices
• Bank and Office Security – Identity verification for restricted areas
• POS and Cash Register Systems – User authentication for staff access
• Embedded Biometric Products – Suitable for OEM and custom integration
• DIY and Educational Projects – Compatible with Arduino, Raspberry Pi, and ESP32
• IoT Security Devices – Adds biometric authentication to connected products