The rain sensor module is an easy tool for rain detection. It can be used as a
switch when raindrop falls through the raining board and also for measuring rainfall
intensity. The module features, a rain board and the control board that is separate for
more convenience, power indicator LED and an adjustable sensitivity though a
potentiometer. The analog output is used in detection of drops in the amount of rainfall.
Connected to 5V power supply, the LED will turn on when induction board has no rain
drop, and DO output is high. When dropping a little amount water, DO output is low, the
switch indicator will turn on. Brush off the water droplets, and when restored to the initial
state, outputs high level.