When I run my fingerprint reader on Arduino UNO with the enroll script, "Did not find fingerprint sensor 
I get the ``` error if the connection diagram is
GND - GND
TX - 2
RX-3
VI+ - 3.3V
There are more pins on the back of the fingerprint reader that can be connected, but I don't know where and how to connect them. I would be very happy if you could help me.
4 posts - 2 participants