AS608 STM3251 Optical Fingerprint Identification Module

The AS608 STM3251 is a compact and high-performance optical fingerprint sensor module designed for biometric identification. It operates at a voltage range of 3.3 to 5 V DC and communicates via a TTL serial interface with adjustable baud rates from 9600 to 57600 (default 57600). This module features an optical sensor capable of capturing a fingerprint image in under one second, with a detection window size of 16x18 mm.

It can store up to 162 fingerprint templates, each template being 512 bytes in size. The module provides a high level of security with a false acceptance rate (FAR) of less than 0.001% and a false rejection rate (FRR) of less than 1%, corresponding to a security level of 3 on a scale of 1 to 5. It is designed to operate within a temperature range of -20 to +50 °C and has compact dimensions of 56 x 20 x 21 mm.

Key Features:

• Operating voltage: 3.3 to 5 V DC
• Interface: TTL serial communication
• Baud rate: 9600 to 57600 (default 57600)
• Image capture time: <1 second
• Storage capacity: 162 fingerprint templates
• Template size: 512 bytes
• False acceptance rate: <0.001%
• False rejection rate: <1%
• Operating temperature: -20 to +50 °C
• Dimensions: 56 x 20 x 21 mm

Application Areas:

The AS608 module is ideal for access control systems, biometric security devices, attendance and time tracking systems, and any project requiring reliable fingerprint identification. It is widely used in electronic projects involving microcontrollers such as Arduino or STM32 for home, industrial, or institutional security applications.

Example Project Using the AS608 Module:

A common project is an Arduino-based access control system where the AS608 module is used to enroll and verify users’ fingerprints. The module communicates with the Arduino via TTL serial interface, allowing management of fingerprint enrollment, recognition, and deletion. This project can be applied to secure doors, safes, or sensitive equipment.