Waveshare fingerprint sensor

Hello everybody I just started working wih arduino for learning how to program it and I bought waveshare fingerprint sensor which has 6 Wires https://www.waveshare.com/w/upload/4/45/UART_Fingerprint_Sensor_(C)_User_Manual_en.pdf and this is the datasheet for the sensor, I am using Adafruit library and example code without altering on arduino UNO and Due both boards but it is giving ouput on serial monitor something like that

"Adafruit finger detect test
Did not find fingerprint sensor :("

does anybody knows how to this device make working

Sounds like a connection problem.

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