Fingerprint sensor Module R307
🔒 R307 Optical Fingerprint Sensor Module
Biometric Authentication for Arduino, Raspberry Pi, and Microcontrollers
The R307 Fingerprint Sensor is a reliable and affordable biometric module that uses optical fingerprint recognition to securely identify and verify users. It features an internal image processor, storage for up to 1,000 fingerprints, and a UART interface compatible with Arduino, ESP32, Raspberry Pi, and more.
⚙️ Technical Specifications
| Parameter | Specification |
|---|---|
| Sensor Type | Optical Fingerprint Sensor |
| Model | R307 |
| Interface | UART (Serial TTL) |
| Operating Voltage | DC 3.6V – 6V |
| Working Current | <100mA |
| Fingerprint Capacity | 1000 templates |
| False Accept Rate | <0.001% |
| False Reject Rate | <1% |
| Matching Mode | 1:1 and 1:N |
| Baud Rate | 57600 (default), configurable via software |
| Image Resolution | 500 DPI |
| Module Size | 44.6 x 20 x 22.3 mm (approx.) |
✅ Features
🔒 Secure biometric verification – store and match fingerprints directly on module
📦 Internal buffer supports enrolling, searching, and deleting templates
🔁 Fast response time – matching in less than 1 second
🧠 Works with Arduino, STM32, ESP32, Raspberry Pi, and more
🧰 Includes a protective acrylic lens and 4-pin interface cable
🧪 Typical Arduino Wiring
| R307 Pin | Arduino Pin |
|---|---|
| VCC | 5V |
| GND | GND |
| TX | D2 (via SoftwareSerial) |
| RX | D3 (via 1k/2k divider recommended) |
Use the Adafruit Fingerprint Sensor Library for easy integration.
📱 Applications
Biometric security access systems
Smart door locks
Attendance systems
Voting machines
Secure user login for DIY projects