How to use a fingerprint sensor with Arduino
If you want to add biometric security features to your Arduino projects, an easy way to do so, is to add a fingerprint sensor module to it. In this video we demonstrate how easy to use a fingerprint sensor with an Arduino Nano and a small display.
I always wanted to try a fingerprint sensor module in order to learn more about its technology and use it in some of my projects in order to add biometric security to them. While searching for a nice and low cost sensor, I discovered this sensor module on Gearbest.com. The sensor costs around 30$ and you can find a link for it in the description of the video. Gearbest.com was kind enough to send a sample unit in order to test it and share my opinion about it with you.
WHERE TO BUY
Fingerprint Sensor: http://educ8s.tv/part/FingerprintSensor
Arduino Nano: http://educ8s.tv/part/ArduinoNano
1.44 Color TFT: http://bit.ly/144TFTLCD
Small Breadboard: http://educ8s.tv/part/SmallBreadboard
Jumper Wires: http://bit.ly/Wires3InOne
Power bank Xiaomi: http://educ8s.tv/part/Powerbank
The fingerprint sensor module is small, and nicely built and it uses some advanced DSP (Digital Signal Processing) chips inside. The sensor works like this. It is an optical sensor, which means it analyzes the photo of a finger. It then renders the image, makes some calculations, finds the features of that finger and then searches in its memory for a fingerprint with the same characteristics. It can achieve all that in less than a second! This module can store up to 1000 fingerprints in its memory and its false acceptance rate is less than 0.001% which makes it pretty secure! Great! We get all that in a very easy to use module and with very low cost! It is a really impressive technology!
In order to demonstrate a simple use of the sensor a built this simple project. I have hooked up the sensor to an Arduino Nano, and I also use the small but very fast 1.44 inch color TFT display. The project asks for a valid fingerprint in order to unlock. When I place my finger on the sensor, it recognizes my finger, turns the fingerprint icon green and it welcomes me. If my girlfriend places her finger on the sensor, it also recognizes her, and displays a welcome message with her name. If I place another finger on the sensor, the project does not unlock the screen. It works fine and you are going to see, you can build this project in less than 10 minutes! Let’s see how to achieve that!
CODE OF THE PROJECT
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