R305 Fingerprint Sensor Module
The R305 Fingerprint Sensor Module is an optical biometric sensor designed for accurate fingerprint recognition and verification. It integrates easily with Arduino, NodeMcu, Raspberry Pi, and other microcontroller platforms, making it ideal for access control systems, attendance monitoring, home automation, and IoT-based security projects.
Equipped with a high-speed image processor, the R305 module can store up to 162 fingerprints in internal memory and quickly verify fingerprint identity within 1 second. Its compact design allows for easy integration into doors, safes, or any DIY electronics project requiring secure authentication.
✨ Key Features
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Optical fingerprint detection technology
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Natively supports UART TTL communication
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Fast verification speed (<1 second per scan)
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High fingerprint capacity (up to 162 templates)
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Durable and compact design
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Compatible with Arduino, NodeMcu, Raspberry Pi, and other microcontrollers
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Reliable for access control, attendance systems, and IoT security
🔧 Technical Specifications
| Parameter | Details |
|---|---|
| Operating Voltage | 3.6–6V DC |
| Communication | UART TTL (3.3V/5V logic) |
| Fingerprint Storage | Up to 162 templates |
| Verification Time | ≤1 second |
| False Acceptance Rate (FAR) | ≤0.001% |
| False Rejection Rate (FRR) | ≤1% |
| Sensor Type | Optical |
| Interface | UART TTL |
| Operating Temperature | 0°C – 50°C |
| Dimensions | 38.6 × 26.5 × 14 mm |
🛠 Applications
Security & Access Control
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Smart door locks
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Office or laboratory access systems
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Safes and lockers
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IoT security systems
Attendance Systems
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Employee attendance tracking
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School or university biometric attendance
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Event access management
⚠ Precautions
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Ensure proper supply voltage (3.6–6V DC) to avoid damage.
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Keep the sensor surface clean and free of scratches.
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Avoid exposing the module to direct sunlight or moisture.
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Do not touch the optical sensor surface with sharp objects.
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Allow proper alignment and placement for reliable fingerprint reading.
🔗 Internal Category Links
🎥 YouTube Tutorial Video
Watch Video:https://www.youtube.com/shorts/Ol3xNX9ItX8
4. Product Summary
The R305 Fingerprint Sensor Module is a reliable and fast biometric sensor for secure authentication, attendance tracking, and access control. Compatible with Arduino, NodeMcu, and Raspberry Pi, it enables DIY IoT security projects and professional access solutions with high accuracy and durability.
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