![]() Voltage divider resistors are needed to connect the fingerprint scanner to the Arduino Uno as shown in the circuit diagram in the article on GT-511C3 hardware. In this article, an Arduino Uno is used as a USB adapter and configured to relay information between the demo application running on the PC and the GT-511C3 FPS. The demo software runs on Windows and requires the FPS to be connected to the PC via a USB to TTL adapter. There is already some libraries to help your using this sensor with Arduino, such as the adafruit fingerprint library. ![]() As the usage, the fingerprint is really easy to use with the serial UART. You can also enroll new fingers directly - up to 120 finger prints can be stored in the onboard FLASH memory. Connect to any microcontroller or system with TTL serial, and send packets of data to take photos, detect prints, hash and search. These modules are typically used in safes - there's a high powered DSP chip AS601 that does the image rendering, calculation, feature-finding and searching. This all-in-one optical fingerprint sensor will make adding fingerprint detection and verification super simple.
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