The R307S Optical Fingerprint Reader Sensor Module is a high-performance biometric authentication device designed for secure and reliable fingerprint recognition. Using advanced optical sensing technology and an onboard DSP processor, it performs fingerprint image capture, feature extraction, matching, and storage internally. This makes it ideal for access control systems, attendance machines, smart locks, and embedded security applications.
Core Sensor Specifications
• Sensor Type: Optical fingerprint sensor
• Model: R307S
• Fingerprint Processing: Onboard image processing and matching
• Storage Capacity: Up to 1000 fingerprints (typical)
Electrical & Interface
• Operating Voltage: 3.6 V – 6 V (5 V typical)
• Communication Interface: UART (TTL serial)
• Baud Rate: 9600 bps (default, configurable)
• Interface Pins: VCC, GND, TX, RX
• Indicator: Built-in status LED
Performance Characteristics
• Fingerprint Capture Method: Optical imaging
• Recognition Time: < 1 second
• False Acceptance Rate (FAR): < 0.001%
• False Rejection Rate (FRR): < 1%
• High accuracy with dry and wet fingers
Physical Characteristics
• Sensor Window: Hardened optical glass
• Module Type: Enclosed optical fingerprint sensor
• Cable Type: Pre-attached connector cable
• Compact and robust construction
Compatibility
• Arduino Uno / Mega / Nano
• ESP8266 / ESP32
• STM32, AVR, PIC microcontrollers
• Raspberry Pi (UART interface)
Key Advantages
• Complete biometric processing onboard
• High fingerprint recognition accuracy
• Easy serial communication interface
• Widely supported with libraries and examples
Technical Insights
• Stores fingerprint templates internally
• Supports 1:N and 1:1 matching modes
• Commands handled via serial protocol
• External MCU handles logic, display, and control
Applications
• Biometric access control systems
• Attendance and time-tracking devices
• Smart door locks
• Security and authentication systems
• Embedded and IoT security projects
Pro Tip
• Use stable 5 V power supply for reliable operation
• Keep the sensor window clean for best accuracy
• Enroll fingerprints multiple times for better matching
• Avoid excessive ambient light directly on sensor
Package Includes
• 1 × R307S Optical Fingerprint Reader Sensor Module