My original attempts at getting my R307 fingerprint reader working (over two years ago) came to nothing. Now, thanks to some comments in the Adafruit article I figured I needed an Arduino UNO with a ...

Changed in this fork: lib and examples now use HardwareSerial instead of SoftwareSerial, and support for Arduino v. < 100 removed. Adafruit invests time and resources providing this open source code, ...

Additionally we have also added a push button and a LCD to display the sensor status. The complete circuit diagram for Arduino GT511C3 Fingerprint Sensor interfacing can be found below. Since the Rx ...