Hi qdcs524, I noticed your profile and would like to offer you my project.
Write an arduino program to access fingerprint scanner in android mobile app.
my setup is follow.
HC 05 Bluetooth
R305 fingerprint sensor
Using Bluetooth Arduino will receive command when to read the fingerprint.
Fingerprint module will read the data will send the image data using the same Bluetooth.
Should use only software serial for communication
Use digital pins for communication.
1) Wiring design
2) Arduino code with library
3) setup in my machine if required.