Published March 19, 2023

How to use Raindrop Sensor

Greenhouse project basic

BeginnerFull instructions provided294

Things used in this project

Hardware components

Arduino Uno

Jumper wires (generic)

Solderless Breadboard Half Size

LED (generic)

Software apps and online services

Arduino IDE

Story

What is a raindrop sensor?

A raindrop sensor is a board on which nickel is coated in the form of lines. It works on the principle of resistance. The raindrop sensor measures the moisture via analog output pins and it provides a digital output when a threshold of moisture exceeds.

The rain sensor can malfunction or stop working if it comes in direct contact with water

Raindrop sensor & module

Raindrop sensors can be used for all kinds of weather monitoring System.

Code

Project Code

// Sensor pins pin D6 LED output, pin A0 analog Input

#define ledPin 6
#define sensorPin A0


void setup() {

  Serial.begin(9600);
  pinMode(ledPin, OUTPUT);
  digitalWrite(ledPin, LOW);

}


void loop() {

  Serial.print("Analog output: ");
  Serial.println(readSensor());
  delay(500);

}


//  This function returns the analog data to calling function

int readSensor() {

  int sensorValue = analogRead(sensorPin);  // Read the analog value from sensor
  int outputValue = map(sensorValue, 0, 1023, 255, 0); // map the 10-bit data to 8-bit data
  analogWrite(ledPin, outputValue); // generate PWM signal
  return outputValue;             // Return analog rain value

}