I'm having problems with my new fingerprint scanner, when i used The fingerprint by Arduino and i used the SFGDemo program to scan the finger withe these wiring Red = 5v Black = GND White = D0, Green = D1 it is working very will for the enrolling , but when i use example code For Arduino sketches: White = D3, Green = D2 I got this message (can not Found fingerprint sensor) ????
You've not posted any code. You've not posted a link to the scanner that you have. You've not posted a picture of the wiring.
You've not got a chance of getting an answer until you do.