Review on 🔍 Enhanced Green Light Optical Fingerprint Reader Sensor Module for Arduino Raspberry Pi ESP8266 ESP32 by Rhett Fifer

Despite the included document and demo software, it was a bit unclear how to connect the device to a PC to use the demo software (SynoDemo v2.7). After asking the question and stating that a USB to TTL cable is required (like the Adafruit 954), it took a while to get it working. Make sure the wires are connected as follows: red-red, black-black, green-white, white-green. In the demo software select "Normal Sensor" and the appropriate COM port (for definition see MMC "Computer Management") and everything works very well. In short - it works with PC/Windows with the supplied demo software. Haven't tried Arduino yet.