Fingerprint 2 Unit

2025-11-20T16:18:01+00:00

Price: 13.80

The M5Stack Unit Fingerprint2 is a UART-based fingerprint module with onboard STM32 control, capacitive sensing and a built-in algorithm for dry/wet fingers — ideal for access control, authentication and smart security projects.

The M5Stack Unit Fingerprint2 is a high-performance fingerprint recognition module that integrates an STM32 core controller and an A-K323CP all-in-one fingerprint sensor. It uses a semiconductor capacitive sensor and supports fingerprint acquisition, feature extraction, registration, comparison, storage and retrieval. The built-in algorithm is designed to recognise both dry and wet fingers, offering reliable performance across different conditions.

The module provides flexible fingerprint data management, strong data security and fast search capabilities. It communicates over UART, making it easy to integrate with a wide range of main control platforms. A multicolour LED ring and power indicator are included for clear visual feedback and status prompts.

The Fingerprint2 unit is suited to quick development and integration in applications such as smart door locks, access control systems, attendance terminals, identity authentication, financial devices and small security products.

Features

Integrated STM32 core controller

High-resolution capacitive fingerprint sensor with high-accuracy recognition capability

Fingerprint capacity of 100 entries

Adaptive processing for both dry and wet fingers

Fingerprint management, precise matching, and search functions

Built-in RGB LED ring supporting seven colours for (working status) indication

Development Platform

UiFlow2

Arduino IDE

PlatformIO

Specifications

MCU | STM32G031G8U6
Fingerprint Module | A-K323CP
Fingerprint Resolution | 508 dpi
Image Pixel | 80 * 208
Image Acquisition Size | 8230 Bytes (80 * 208 / 2 = 8320, 4 bits per pixel)
Fingerprint Capacity | 100 entries
Fingerprint Data Size | 7262 Bytes / entry
Communication Method | UART 115200bps @ 8N1

Power Consumption

Working mode: Breathing light ON 40mA; Breathing light OFF 37.25mA
Sleep mode: 14.11mA

Product Size | 24.0 x 62.0 x 8.0mm
Product Weight | 6.1g

Resources

Documents

Package Contents

1x Unit Fingerprint2

HY2.0-4P Grove Cable (20cm)