Instructions

4.2 Installation
We use the library Adafruit-Fingerprint-Sensor-Library from Adafruit,
which is released under the BSD License . You can install the library in the
Arduino IDE under Tools → Manage Libraries… .
4.3 Usage with the library
You can run sample codes under File → Examples → Adafruit Fingerprint
Sensor Library . You can use the enroll script to add fingerprints and
fingerprint to compare a fingerprint to the stored data.
When executing this, make sure that you have selected the correct Board
and Port in Tools .