Fingerprint

Biometric Fingerprint Detector

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Overview

A biometric fingerprint scanner that stores enrolled fingerprints internally and reports matches against them. The module handles all image processing, template extraction, and matching — your host code just enrolls, identifies, or deletes prints with simple text commands over any supported interface.

Common uses: door access controls, locker keys, classroom biometric labs, attendance projects, and any prototype that needs "is this an authorized person?" without rolling your own fingerprint pipeline.

Key features • Fingerprint detector • Biometric sensor • 47x42mm Overall Dimension

Resources 📄 Schematics 🔩 3D STEP file PID: 0x040009

🌿 Cables not included

Modules ship without cables to reduce waste. Some specialty boards include a USB cable; for the rest, see Cables to add cables to your order.

Commands

Commands this module accepts. See Samples for runnable code in popular host languages.

Function	Description
GetSavedCnt()	Returns how many fingerprint model are saved.
DelModel(l)	Deletes model at l location.
StoreModel(l)	Stores a converted model at l location.
TakeImg()	Captures a fingerprint image. Returns 0 if succeeded.
ConvertImg(s)	Converts captured image and stores it in s slot (1 or 2).
FastSearch()	Searches the internal database for a converted image.
SetLed(c,b,k)	Sets the LED to c color (1 red, 2 blue, 3 purple), with b blink(0 always on, 1 blink), with k count (0 is forever!).
DVer()	This driver version.

Peek under the hood

The script below is this module's driver — it teaches the hardware how to respond to the commands listed above. It ships pre-loaded from the factory; most users never need to open it.

Fingerprint Driver

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See full example on GitHub

Samples

Example code that calls this module's commands from popular host languages.

tip

New here? See Get Started to connect a module and send your first command.

Python

Python Sample

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See full example on GitHub

MicroPython

MicroPython Sample

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See full example on GitHub

JavaScript

JavaScript Sample

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See full example on GitHub

.NET

.NET Sample

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See full example on GitHub

Arduino

Arduino Sample

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See full example on GitHub

On-Module Code

Code that runs directly on this module's MCU. See how On-Module Code allows modules to run standalone.

Script

This example runs using the default DUELink Internal Engine using its Scripting Language, and it expects the module's driver to be loaded first, see the Commands Tab.

Standalone Script Sample

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See full example on GitHub

Ordering Info

Product	Part Number	Price
DUELink Fingerprint	GDL-HIFNGRPRNT-B	$49.95

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