Raindrops Sensor Module

The sensor utilizes the decrease in resistance as the area in contact with water increases, similar to the principle of a water level sensor (DM446).

Specifications

• Operating Voltage [V]: 3.3 ~ 5
• Output: Digital, Analog
• Sensitivity adjustment possible with a variable resistor

Example Hardware

• Arduino board
• Jumper cables
• Rainwater detection sensor

Connections

When connecting the sensor part to the module part, there is no polarity, so you can connect them arbitrarily.

Arduino	Raindrops Sensor	Module
5V		VCC
GND		GND
D7		DO
A0		AO
	connect	connect
	connect	connect

Example Code

Example code that outputs digital and analog values of the rainwater detection sensor to the serial monitor.

#define DO 7
#define AO A0

void setup(){
  pinMode(DO, INPUT);
  Serial.begin(9600);
  Serial.println("Start");
}

void loop(){
  Serial.print("AO : ");
  Serial.print("\t");
  Serial.print(analogRead(AO));
  Serial.print("\t");
  Serial.print("DO : ");
  Serial.println(digitalRead(DO));
  delay(100);
}

Execution Result

• When no water is detected by the sensor

• When water is detected by the sensor