SKU: SENS-0545
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Grow R304S Fingerprint Module with USB 2.0 & UART Interface

₹2,539.00 (Inclusive of all taxes)
Out of Stock

The Grow R304S Fingerprint Module is a compact biometric sensor offering USB 2.0 and 3.3V TTL UART interfaces for integration into access control, attendance, and embedded security systems. It features a 508 DPI optical sensor with a capacity for 1000 fingerprint templates, operating from a 4.2-6.0V DC supply.

Features

  • High-resolution 508 DPI optical fingerprint sensor with 208 x 288 pixel array.
  • Dual interface: USB 2.0 for direct PC connection and 3.3V TTL UART for microcontroller integration (Arduino, ESP32, Raspberry Pi).
  • Large storage capacity for up to 1000 individual fingerprint templates.
  • Low power operation with a working current under 55mA from a 4.2-6.0V DC supply.
  • Compact form factor (20.4 x 33.4 mm) with an 11 x 15 mm effective collection window.

Out of stock

Description

The Grow R304S is an integrated fingerprint processing module combining an optical sensor, image processor, and matching algorithm on a single chip. It captures high-definition fingerprint images suitable for reliable 1:1 verification and 1:N identification tasks, even under varying finger conditions.

Communication is facilitated via a standard USB 2.0 port for host computer applications or a 3.3V logic-level UART serial interface for direct embedding into microcontroller-based projects. The module’s low power consumption and robust construction make it suitable for deployment in standalone battery-powered devices and continuous-duty industrial systems.

Key Features

  • Integrated Biometric System: Combines optical sensor, image processing, and matching algorithm in a single module, simplifying system integration.
  • High Recognition Accuracy: Advanced algorithm provides a high recognition rate across dry, wet, or aged fingerprints.
  • Dual Communication Protocol: Offers flexible connectivity with both USB 2.0 (for PC-based systems) and 3.3V TTL UART (for embedded microcontrollers like Arduino, STM32, or ESP32).
  • Large Template Database: Capable of storing and matching against a database of up to 1000 fingerprint templates internally.
  • Optimized Power Profile: Consumes less than 55mA during active operation, enabling use in portable and low-power applications.
  • Compact & Durable Design: The small PCB footprint and robust component selection ensure reliable performance in diverse environmental conditions.

Applications

  • Embedded Access Control Systems: Door locks, safes, and cabinet locks requiring biometric authentication.
  • Time & Attendance Terminals: Standalone or networked employee clock-in systems with fingerprint verification.
  • Secure Device Authentication: Adding biometric security to PCs, point-of-sale systems, or industrial control panels.
  • IoT and Smart Home Security: Integration into smart locks, personal safes, or restricted-access compartments within home automation projects.
  • DIY Electronics & Prototyping: Educational and prototyping platforms for learning about biometric systems with Arduino, Raspberry Pi, or ESP32.

Technical Specifications

Manufacturer / BrandGrow
Model NumberR304S
Product TypeFingerprint Module
Operating VoltageDC 4.2 - 6.0V
Working Current< 55 mA
InterfacesUSB 2.0, UART (3.3V TTL Logic)
Sensor Resolution508 DPI
Sensor Pixel Array208 x 288 pixels
Effective Collection Area11 x 15 mm
Module Dimensions20.4 x 33.4 mm
Fingerprint Storage Capacity1000 templates

Frequently Asked Questions

What is the operating voltage range for the Grow R304S module?

The Grow R304S Fingerprint Module requires a DC power supply between 4.2V and 6.0V. It is compatible with common 5V regulated supplies from Arduino boards, USB ports, or dedicated power adapters. Exceeding 6.0V may damage the module.

How do I connect the R304S to an Arduino or other microcontroller?

Connect using the provided 4-pin cable to the module's UART port. This is a 3.3V TTL logic interface (TX, RX, VCC, GND). Connect VCC to your microcontroller's 5V or 3.3V pin (within the 4.2-6V range), GND to GND, and cross-connect TX to RX and RX to TX. Ensure your microcontroller's serial logic levels are compatible.

What is the maximum number of fingerprints the module can store?

The module has an internal storage capacity for up to 1000 fingerprint templates. These templates are stored in the module's non-volatile memory, allowing them to be retained even when power is disconnected. Management (enrollment, deletion, search) is performed via the serial command protocol.

Can this module be used with a computer via USB?

Yes, the Grow R304S includes a standard USB 2.0 port. When connected to a PC, it typically enumerates as a virtual COM port (CDC). You can then use the manufacturer's provided SDK or terminal software to send the same serial commands used by microcontrollers for enrollment and verification.

What is the sensor resolution and does it support wet/dry fingers?

The optical sensor has a resolution of 508 DPI (Dots Per Inch) with a 208 x 288 pixel array. The integrated algorithm is designed for a high recognition rate and can accommodate variations in finger conditions, including dry, wet, or lightly worn fingerprints, though optimal performance is achieved with clean, dry fingers.

Package Includes

  • 1 x Grow R304S Fingerprint Module
  • 1 x 15cm 4-Pin Serial Cable (for UART connection)

Additional Information

Weight 0.2 kg
Dimensions 10 × 3 × 8 cm