4.2 Installation
We use the library
which is released under the
. 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
.
A voltage translator should be used with the Arduino, because the
fingerprint sensor only has a logic level of 3.3V.
as voltage converter.
The pin
Touch
is an output pin, which sends a signal, if a finger has been
placed on the sensor. The sensor can be operated with the
3.3 V
pin, but
is then only able to detect whether a finger has been placed on it via the
touch pin and cannot read the fingerprint.
