AS608 Optical Fingerprint Reader Sensor Module for Arduino & Raspberry Pi - Biometric ID Scanner

Specifications

• Sensor Type: Optical (High-Resolution)

• Onboard Processor: High-speed DSP (AS608)

• Interface: UART (TTL) & USB 1.1

• Resolution: 500 dpi

• Fingerprint Capacity: 162 templates

• Supply Voltage: 3.3V to 6V DC

• Working Current: <120mA (Peak)

• False Acceptance Rate (FAR): <0.001%

• False Rejection Rate (FRR): <1.0%

• Matching Mode: 1:1 and 1:N

• Baud Rate: 9600 to 115200 (Default 57600)

Key Applications & Projects

• Biometric Door Locks: Replace physical keys with a simple touch.

• Time & Attendance Systems: Keep track of students or employees with high-speed 1:N matching.

• Secure Storage: Add a fingerprint layer to safes, gun lockers, or PC login systems.

• Anti-Theft Ignition: Ensure only authorized users can start a vehicle or operate machinery.

Project Evolution

• Past Projects (Prerequisites): If you've previously built projects using basic Keypads or RFID modules, you'll find the AS608 is the ultimate upgrade for user-specific identity management.

• Feature Upgrade: This sensor unlocks the ability to manage individual user permissions without the need for external databases, as the templates are stored directly on the module's flash memory.

• Effort/Requirements: Intermediate. Wiring is a simple 4-pin UART setup, but managing the fingerprint database via code requires basic library knowledge.

Accessories

• Included: 1x AS608 Optical Fingerprint Sensor, 1x  Connection Cable.

• Required Additional Items: Arduino/ESP32, Jumper Wires, and a 5V Power Supply.

Frequently Asked Questions (FAQ)

• Does it store actual images of fingerprints? No, it stores a mathematical "template" of the fingerprint features for privacy and security.
• Can I use this with a Raspberry Pi? Yes, it works over the UART pins or via a USB-to-Serial converter.
• What is the default baud rate? The default is 57600 bps.
• Does it work with wet fingers? Light moisture is okay, but it works best with clean, dry fingers.
• What happens if I lose power? The fingerprint templates are stored in non-volatile flash memory and are not lost.
• Can I enroll fingerprints using a PC? Yes, it has a USB 1.1 interface that works with various Windows "Demo" software.
• Is it compatible with the Adafruit library? Yes, it is fully compatible with the standard Adafruit Fingerprint Sensor library.
• How many fingerprints can it hold? Up to 162 individual prints.
• Does the LED change color? The sensor features a red/blue backlight that indicates scanning status.
• Can I use it outdoors? It should be protected from direct sunlight and moisture to prevent optical interference.
• Is the sensor surface scratch-resistant? It has a hard optical coating, but sharp objects should be avoided.
• How do I delete a single fingerprint? You can delete specific IDs via the library's "delete" function.
• Is the communication encrypted? The UART communication is standard TTL; encryption must be handled by your microcontroller.
• What is the matching speed? Typically less than 1 second for a 1:162 search.
• Can children use this? Yes, though very small fingers may require multiple enrollments for better accuracy.
• How much power does it use? It draws about 120mA during a scan and very little during standby.
• Can I change the security level? Yes, the False Acceptance Rate threshold is adjustable via software commands.
• What is the resolution? A crisp 500dpi for high-detail feature extraction.
• Can I download the fingerprint templates to a PC? Yes, the templates can be exported and imported to other modules.
• Is there a sleep mode? Yes, the module supports low-power modes for battery-operated devices.