1) This product is used to detect or measure the amount of rain.
2) Operating voltage: 3.3 to 5Vdc.
3) Power and status LED indicator.
4) Adjustable trigger threshold. Adjust potentiometer clockwise to increase sensitivity.
5) Digital and analog output.
6) Digital output format:
1 = Measured value < Set value (status LED off)
0 = Measured value => Set value (status LED on)
7) Analog output can be connected to microcontroller analog pin to get the amount of rain value.
VCC = 3.3 to 5V
GND = Ground
DO = Digital output
AO = Analog output
9) Dimension: 31 x 15 mm.