Connect SEN0551 to DFR0918

I am having difficulty to get the signal on the software from the Gravity: Liquid Flow Sensor (SEN0551) to the Raspberry Pi GPIO Terminal Block HAT (DFR0918). 

If i test it, I can listen the turbine rotating, I can see the Led from the GIO blinking but I cannot find any program that can red this pulse. 

Do you have any template software that I can test it? 

Thank you.