Fingerprint scanners are truly amazing! Why rely on a key when you have a secure solution right at your fingertips? Many fingerprint scanners are unreliable or hard to implement, but this GT-521F52 fingerprint module from ADH-Tech is different. It communicates via TTL Serial, making it a breeze to integrate into your next project. With an onboard optical sensor and a 32-bit ARM Cortex M3 processor, it handles all the complex work of reading and identifying fingerprints.
To start using it, simply send the corresponding command and press your finger against the reader three times to register each fingerprint you want to store. This scanner can hold multiple fingerprints, and you can even download the fingerprint database from the unit and share it with other modules. Besides the fingerprint 'template', you can get the fingerprint image and raw images from the optical sensor!
This module is an upgraded version of the GT-521F32, capable of storing up to 3,000 different fingerprints. It offers 360° fingerprint recognition and can download/upload templates through a serial interface. The GT-521Fxx series has a 450dpi resolution, with a false acceptance rate of <0.001% and a false rejection rate of <0.1%. It can identify a unique fingerprint in less than 1.5 seconds!
The module is compact and easy to mount, with four mounting holes around the sensor. The onboard JST-SH connector has four signals: Vcc, GND, Tx, and Rx. You can find a compatible JST-SH pigtail in the Hookup Accessories section.
Note: Although this fingerprint scanner has the same connector as our Qwiic boards, it's not Qwiic or I2C compatible. However, our Qwiic cables, like the 100mm version, will work with this board.
Using the GT-521F52 fingerprint scanner is quite simple. First, to register a fingerprint, send the right command and press your finger on the reader three times. You can store many different fingerprints in it. If you want to share the fingerprint database, you can download it from the unit and use it on other modules. You can also get fingerprint images and raw images from the optical sensor.
When mounting the module, use the four holes around the sensor. Connect it using the JST - SH connector with the four signals (Vcc, GND, Tx, and Rx). You can find a compatible pigtail in the Hookup Accessories.
Remember, this scanner is not Qwiic or I2C compatible, even though it has the same connector as our Qwiic boards. But don't worry, our Qwiic cables will work.
For maintenance, keep the sensor clean. You can use a soft, dry cloth to gently wipe it. Avoid getting it wet or exposing it to extreme temperatures. If you face any issues, check the connections first and make sure the power supply is stable.
