The R307 Optical Fingerprint Reader Sensor Module is a compact, high-performance fingerprint sensor designed for secure identification applications. It features a TTL UART interface allowing for easy integration with microcontrollers or PCs (via a MAX232 or USB-Serial adapter). The module enables users to store fingerprint data locally and configure it for 1:1 (single match) or 1:N (multiple match) identification modes.
This sensor can directly interface with microcontrollers operating at 3.3V or 5V. When connecting to a PC’s serial port, a level converter such as the MAX232 is required for compatibility.
The R307 module integrates an image capture system with an algorithm chip offering an all-in-one solution for fingerprint recognition. It supports secondary development, allowing it to be embedded into a variety of applications such as access control systems, attendance tracking, safety deposit boxes, and vehicle locks.
With its low power consumption, compact size, and high accuracy (up to 500 DPI resolution), the R307 delivers excellent performance in identifying fingerprints. The module is equipped with professional optical technology and advanced image processing capabilities, ensuring reliable fingerprint capture and detection.
Pinouts:
5V: Regulated 5V DC
GND: Common Ground
TXD: Data output – Connect to MCU RX
RXD: Data Input – Connect to MCU TX
TOUCH: Active Low output when there is touch on sensor by finger
3.3V: Use this wire to give 3.3V to sensor instead of 5V
USB Cable Connections are 5V/D /D-/GND (Optional)
Features
Integrated image collecting and algorithm chip together, ALL-in-One.
The fingerprint reader can conduct secondary development, can be embedded into a variety of end products.
Low power consumption, low cost, small size, excellent performance.
Professional optical technology, precise module manufacturing techniques.
Good image processing capabilities can successfully capture an image up to resolution 500 dpi.
Specification
Operating voltage (v): 4.2 ~ 6 VDC
Current consumption: ≤75mA
Verification Speed: 0.2 sec
Scanning Speed: 0.3 sec
Character file size: 256 bytes
Template size: 512 bytes
Package Includes
1 x R307 Optical Fingerprint Reader Sensor Module.
The R307 Optical Fingerprint Reader Sensor Module is a compact biometric input device that captures and verifies fingerprint patterns for secure access control. Designed with an integrated image sensor and algorithm chip, it enables reliable 1:1 or 1:N identification in embedded systems and PC-based applications.
Key Features of R307 Optical Fingerprint Reader Sensor Module
Optical sensor with built-in algorithm chip for image capture and matching
Fast verification speed of 0.2 sec and scanning speed of 0.3 sec
TTL UART interface for seamless communication with microcontrollers
Operates at 4.2–6 VDC with low current consumption (≤ 75 mA)
Configurable single match (1:1) or multi-match (1:N) identification
Fast shipping from Zbotic—order ships within 24 hours
Applications and Use Cases
Electronic door locks and access control systems
Time attendance terminals for offices and factories
Secure authentication in kiosks and ATMs
Biometric safety locks for cabinets and safes
Microcontroller-based DIY security projects
PC enrollment and management via USB-Serial adapter
How to Use R307 Optical Fingerprint Reader Sensor Module
Connect the R307 to a microcontroller’s UART pins at 3.3 V or 5 V logic levels, or attach a MAX232/USB-Serial adapter for PC use. Apply 4.2–6 VDC to the module, then send enrollment and verification commands over serial. The on-board processor handles image capture, template storage (512 bytes per template), and matching without additional hardware.
Why Buy from Zbotic?
Genuine Products: All items sourced from authorized distributors
Fast Shipping: Orders ship within 24 hours with tracking (non backordered products)
Free Shipping: Free delivery on qualifying orders
COD Available: Cash on Delivery, UPI, cards, net banking
Technical Support: Expert help for setup and troubleshooting
Easy Returns: Hassle-free replacement for defective products
Frequently Asked Questions
What power supply and current does the R307 require?
The module operates on 4.2 to 6 VDC and draws up to 75 mA during normal operation, making it suitable for both battery- and mains-powered systems.
How do I connect the R307 to a PC?
Use a MAX232 level converter or a USB-Serial adapter to translate TTL UART signals to RS-232 or USB, then communicate with the sensor using your preferred terminal software or custom code.
How many bytes are used for fingerprint templates?
Each fingerprint template consumes 512 bytes of storage on the module, while the character file for matching uses 256 bytes.
The R307 Optical Fingerprint Reader Sensor Module is a versatile biometric/ecg/emg sensor used across a wide range of applications including electronics projects, DIY builds, prototyping, and educational experiments.
Common use cases:
Integrating into a custom electronics project
Learning and experimenting with circuits
Replacing or upgrading components in existing setups
This product is ideal for electronics enthusiasts, engineers, and students.
Technical Tip: Always verify voltage and current requirements before connecting to your circuit. Check datasheets for detailed specifications and pin configurations.
Shipping & Delivery
Free shipping on orders above ₹999 across India
Dispatched within 1-3 business days
Expected delivery: 3-7 business days depending on location
Secure packaging to ensure safe transit of electronic components
Weight
0.020001 kg
Dimensions
3 × 4 × 2 cm
15 Days Warranty
Please note that this item is only covered by a standard supplier warranty against manufacturing defects for a period of 15days from the time of delivery. It is important to understand that only manufacturing defects are covered under this warranty, and any other issues will not be considered for reimbursement or replacement. We strongly advise inspecting the product upon delivery to ensure it meets your expectations. In case of any manufacturing defects, we guarantee reimbursement or replacement.
What voids warranty:
If the product is subject to misuse, tampering, static discharge, accident, water or fire damage, use of chemicals & soldered or altered in any way.
Vansh Singh (verified owner) –
Good quality R307 Optical Fingerprint Reader Sensor. Some variation in readings but within acceptable range.
Sameer Joshi (verified owner) –
Okay R307 Optical Fingerprint Reader Sensor. Had to add a capacitor to stabilize readings. Works now.
Sameer Bhatt (verified owner) –
Great R307 Optical Fingerprint Reader Sensor. Using it in my smart agriculture system. Reliable measurements every time.
Lokesh Sen (verified owner) –
This R307 Optical Fingerprint Reader Sensor is a must-have for sensor projects. Plug and play with Arduino.
Prateek Rao (verified owner) –
This R307 Optical Fingerprint Reader Sensor works great with Arduino. Easy to wire up and code.
Urmi Thakur (verified owner) –
Great quality R307 Optical Fingerprint Reader Sensor. Calibrated it easily and the accuracy is impressive.
Manoj Batra –
Outstanding accuracy from this R307 Optical Fingerprint Reader Sensor. Compared with a professional instrument, readings match closely.
Hardik Joshi –
Great quality R307 Optical Fingerprint Reader Sensor. Calibrated it easily and the accuracy is impressive.
Sarthak Krishnan (verified owner) –
Nice R307 Optical Fingerprint Reader Sensor. Readings are mostly accurate. Good enough for my hobby project.
Pankaj Chauhan –
This R307 Optical Fingerprint Reader Sensor is a must-have for sensor projects. Plug and play with Arduino.
Anonymous (verified owner) –
Product is the same as described in the website. As good as expected
Rohit Iyer (verified owner) –
Great quality R307 Optical Fingerprint Reader Sensor. Calibrated it easily and the accuracy is impressive.
Ashish Khanna (verified owner) –
Bought this R307 Optical Fingerprint Reader Sensor for my college project. Accurate readings, easy to code. Very happy!
Nakul Deshpande (verified owner) –
Perfect for my weather station. This R307 Optical Fingerprint Reader Sensor gives consistent readings day and night.
Kunal Bhat –
Perfect for my weather station. This R307 Optical Fingerprint Reader Sensor gives consistent readings day and night.
Dev Yadav –
Nice R307 Optical Fingerprint Reader Sensor. Readings are mostly accurate. Good enough for my hobby project.
Gauri Chauhan –
Good quality R307 Optical Fingerprint Reader Sensor. Some variation in readings but within acceptable range.
Ravi Patil –
Excellent sensitivity and range on this R307 Optical Fingerprint Reader Sensor. Works better than I expected.
Isha Kamath (verified owner) –
Good quality R307 Optical Fingerprint Reader Sensor. Some variation in readings but within acceptable range.
Shivam Chatterjee (verified owner) –
Nice R307 Optical Fingerprint Reader Sensor. Readings are mostly accurate. Good enough for my hobby project.
Sonali Singh (verified owner) –
Excellent sensitivity and range on this R307 Optical Fingerprint Reader Sensor. Works better than I expected.
Sarthak Mishra (verified owner) –
Decent R307 Optical Fingerprint Reader Sensor for the price. Requires proper wiring but works well once set up.
Manoj Naidu –
Good quality R307 Optical Fingerprint Reader Sensor. Some variation in readings but within acceptable range.
Isha Yadav (verified owner) –
This R307 Optical Fingerprint Reader Sensor is excellent for the price. My data logging project is working perfectly now.
Uday Sethi (verified owner) –
Very satisfied with this R307 Optical Fingerprint Reader Sensor. Library support is good and it’s easy to interface.
Zubin Naidu (verified owner) –
Pretty good R307 Optical Fingerprint Reader Sensor. Documentation could be better but the sensor itself is solid.