Python module for fingerprint scanner GT511C3
Step 1: Connect the TX pin of the fingerprint GT511C3 to RX in the GPIO
Step 2: Connect the RX pin of the fingerprint GT511C3 to TX in the GPIO
Step 3: Connect the VCC pin of the fingerprint GTC511C3 to VCC 3,3 in GPIO
Step 4: Connect the Ground pin of fingerprint GT511C3 to ground pin in GPIO
This may not work fine, in this case, try to change the fingerprint baud rate
Refer gitDOC for explanation