Fingerprint Scanner TTL (GT-521F32) SDK software

Sensors Biometrics
1

I am having trouble with the SDK software that is used for the TTL (GT-521F32) fingerprint scanner. I have my device wired correctly to the one they show in the hookup guide, I am using a resistor voltage divider. I have checked the wiring multiple times and have even tried rebuilding it all together from scratch. My problem I am having is after I upload the code to my arduino uno, I go to my SDK software and select the correct com port and baud rate but then when I go to click open nothing happens.

Any help would be greatly appreciated.

Thank you for your time.

2

Can you go to device manager (or equivalent) and change the COM port to something between 3-10 as mentioned? https://learn.sparkfun.com/tutorials/fi … or-arduino

Share a photo of the wiring/setup

3

The COM is on com 4 already for the arduino uno. I can get you a photo on how it is wired tomorrow if you’re still around to help.

4

You need a FTDI connected to the sensor rather than an Uno. With the Unt, the SDK is talking to the Uno and not the sensor. Since the Uno isn’t a fingerprint sensor the software is unhappy.