SKU: SENS-0575
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ADH-Tech GT521F52 Optical Fingerprint Scanner Module with JST SH Connector

₹2,629.00 (Inclusive of all taxes)
Out of Stock

The ADH-Tech GT521F52 is an optical fingerprint scanner module featuring a high-resolution 450 DPI sensor and an integrated ARM Cortex-M3 processor for onboard template processing. It communicates via a simple UART interface (3.3V logic) and is compatible with 3.3V to 6V power supplies, making it suitable for integration into access control systems, security devices, and embedded projects.

Features

  • High-resolution 450 DPI optical sensor for precise fingerprint imaging.
  • Onboard ARM Cortex-M3 processor handles enrollment, verification, and 1:N identification.
  • Large storage capacity for up to 3,000 fingerprint templates.
  • Simple UART serial interface (3.3V logic levels) for easy microcontroller integration.
  • Wide operating voltage range from 3.3V to 6V DC.

Out of stock

Description

The GT521F52 module utilizes an optical scanning method to capture a high-quality digital image of a fingerprint. The integrated 32-bit ARM Cortex-M3 microcontroller runs advanced fingerprint algorithms to process the raw image, extract unique features, and generate a compact 496-byte template. This onboard processing enables fast 1:1 verification and 1:N identification without burdening the host system.

Designed for robust performance, the sensor features an anti-scratch surface with a hardness rating of ≥5H and is engineered to work reliably with dry, moist, or rough fingerprints. The module supports a wake-on-touch function via its metal frame, conserving power when idle. Communication is handled through a straightforward UART protocol, requiring only TX, RX, and power connections.

Key Features

  • High-Capacity Storage: Securely stores templates for up to 3,000 individual fingerprints internally.
  • Advanced Onboard Processing: Features a dedicated ARM Cortex-M3 MCU for fast template generation and matching.
  • Robust Optical Sensor: 450 DPI resolution sensor with a hardened, scratch-resistant surface (≥5H) for long-term durability.
  • Low Power Consumption: Consumes less than 130 mA during operation and features a wake-on-touch function to minimize idle current.
  • Simple Serial Integration: Utilizes a UART interface (3.3V logic) for easy connection to microcontrollers, SBCs, or via a USB-UART converter.
  • High Accuracy Rates: Boasts a low false acceptance rate (<0.001%) and false rejection rate (<0.1%) for reliable security.
  • Wide Voltage Compatibility: Operates from a 3.3V to 6V DC supply, accommodating various embedded power systems.

Applications

  • Secure physical access control systems for doors, gates, and lockers.
  • Biometric authentication in time & attendance terminals and secure logins.
  • Embedded security for IoT devices, safes, and personal storage solutions.
  • Identity verification in kiosks, vending machines, and self-service terminals.
  • Integration into custom security projects using Arduino, Raspberry Pi, or ESP32 platforms.

Technical Specifications

Model NumberGT521F52
Sensor TypeOptical Scanner
Resolution450 DPI
Image Size258 x 202 Pixels
Fingerprint Window12.9 x 16.9 mm
Fingerprint CapacityUp to 3,000 templates
Template Size496 Bytes + 2 Bytes checksum
ProcessorARM Cortex-M3 Core MCU
Communication InterfaceUART (TX/RX logic: 3.3V)
Operating Voltage3.3V to 6V DC (Power Pins)
Operating Current< 130 mA
False Acceptance Rate (FAR)< 0.001%
False Rejection Rate (FRR)< 0.1%
Enrollment Time< 3 seconds (for 3 fingerprints)
Connector1 mm pitch 4-pin JST SH

Frequently Asked Questions

What is the communication interface for the GT521F52 module and what voltage levels does it use?

The module communicates via a UART (Serial) interface. The TX and RX pins operate at 3.3V logic levels. You can connect it directly to a 3.3V microcontroller like an ESP32 or STM32. For use with 5V systems like Arduino Uno, a logic level converter is recommended to avoid damaging the module's UART pins.

What is the power supply requirement and how many wires are needed for connection?

The module requires a 3.3V to 6V DC power supply on its dedicated power pins. A basic connection requires four wires: VCC (3.3-6V), GND, TX (module transmit), and RX (module receive). The module's internal regulator handles power conversion for the core logic and sensor.

How does the fingerprint enrollment and matching process work?

Enrollment involves placing a finger on the sensor multiple times (typically 3 instances) to create a unique template, which takes less than 3 seconds. The onboard ARM Cortex-M3 processor handles all template generation and storage. For verification (1:1), you send a specific user ID and a live scan. For identification (1:N), the module compares the live scan against all stored templates and returns a matching ID.

Does the module include a connector, and what is the pinout?

Yes, the package includes two 4-pin JST SH connectors. The standard pinout for the module is: Pin 1 (VCC), Pin 2 (TX), Pin 3 (RX), Pin 4 (GND). Always verify the pinout markings on your specific module before wiring, as configurations can sometimes vary.

Package Includes

  • 1 x GT521F52 Optical Fingerprint Scanner Module
  • 2 x 1 mm pitch 4-pin JST SH Connector

Additional Information

Weight 0.085 kg
Dimensions 10 × 6 × 9 cm