AS608 Optical fingerprint reader module sensor

Overview

An optical fingerprint sensor module built around the AS608 chip — scans, stores, and matches fingerprints for access-control and identity projects.

Key Specs

Pinout

VCC, GND, TXD, RXD (plus optional touch-detect pin on some versions)

Features

• Stores multiple fingerprint templates onboard
• Can match/verify without needing a host database for basic use

Compatible With

Arduino (Adafruit Fingerprint Sensor library), ESP32, any UART-capable MCU

Use Cases

• Biometric door locks
• Attendance and access-control systems

FAQ

How many fingerprints can it store? Varies by exact module firmware/version — typically in the low hundreds of templates.