flashtree FPM11A Green Light Optical Fingerprint Reader Sensor Module 6 Pins for Arduino Mega2560 UNO R3

Fingerprint Scanner works great.But - awesome bonus is - you can wire Blue (Touch VCC) and Yellow (Touch Signal High) - and then wrap your call to getFingerprintID(); inside a digitalRead(SENSOR_PIN) == HIGH.Of course, in setup(), you also need pinMode(SENSOR_PIN, INPUT);(and at the top of your program, define what pin will be you SENSOR_PIN... for me, I used 4 - since that would be right next to other pins being used: 2 & 3).const int SENSOR_PIN = 4;This way - your device is only scanning for prints when you touch it... and the LEDs stay off when you are not touching it.

Not tested yet but for the first start all goes good

These worked great on a lighting project I am working ob

Used it for Arduino, works well