Optical Fingerprint Reader Sensor Module for Ar Duino 2560 R3 Raspberry Pi ESP8266 ESP32 51 AVR STM32 Red Light DC 3.8-7V

Comes with a ton of documentation including Arduino, CPP, and RPi files (which you can all see before purchase through the link on this page). The Arduino files seem very similar to the Adafruit fingerprint library. I had a few issues (since I'm somewhat new to these things) with the included library, but the Adafruit one works perfectly, so I won't drop ratings for that. I honestly am not entirely sure what the Blue and Yellow wires are for. I believe it's some On/Off control of the actual sensor, but leaving them unplugged works fine with the Adafruit library. No complaints here. The 360 directional orientation of fingerprints seems to work well, I have a finger that I've tested from many different directions and they work.

Item was dead on arrival. 2 hours of troubleshooting and trying to fix it, to no avail. Look for a unit with better QC or order a few of these in case you get a dead one like I did.

Fully functional

Was a little apprehensive purchasing this due to the lack of reviews, but the price was right and the instructions seemed thorough, so figured why not. Extremely happy with my decision. Setup was a breeze and it works exactly as advertised. Highly recommended.

I got this for an arduino project. I was hoping to be able to create a silicon replica of my thumb to use in an escape room, but this fingerprint sensor is a little too smart and won't scan unless it's touching skin (or a similar material like gelatin). When using the sensor for my finger though, I was surprised at how responsive and reliable it was. It was also super easy to setup with my arduino, took all of 5 minutes to setup and use.

I order this to fulfil my College project. Easy to use and work as described. Easy to connect and wiring provided to avoid soldering.

I paid extra to get this item next day. It doesn't work. Now I have to order one more somewhere else. Waste of time and money.

Holly.... Please check which board you use. Uno or 2500 sth.