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.
It measures the analog output and provides a moisture level, where 1023 is high and where 0 is very wet.
|VCC||5 Volts Power Source|
|GND||Ground or negative power source|
The range is 0 to 5 Volts. The lower the voltage, the greater the moisture.