I'm trying to connect a fingerprint sensor to my Raspberry Pi 4 Model B over the GPIO Pins. I found a bunch of instructions on how to connect a fingerprint via USB to Serial converter but I want to use the GPIOs. Is that possible? If yes, can someone tell me how they did it?
When the fingerprint sensor works I would like to use it to log in after booting.
The fingerprint sensor I bought: https://www.amazon.de/DollaTek-Optischer-Fingerabdruckleser-Sensormodul-Mega2560/dp/B07PRMXXXN/ref=sr_1_3?__mk_de_DE=ÅMÅŽÕÑ&crid=3HQZ0BB5NZ0EZ&keywords=raspberry+pi+fingerprint+sensor&qid=1582579184&sprefix=raspberry+pi+finger%2Caps%2C172&sr=8-3 (Affiliate-Link)
Thanks for your help!