Rain Detection System Using Arduino

This project demonstrates how to build a rain detection system using an Arduino microcontroller. The system detects the presence of rainwater and triggers an action, such as playing an audio alert using a buzzer.

Mar 27, 2025

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Apache-2.0

Devices & Components

Arduino Uno Rev3

2S LiPo Battery (7.4V) or External Power Supply

Jumper-Wires

Rain Sensor Module

5V Passive Buzzer

Software & Tools

Webotricks

Project description

Code

1#define RAIN_SENSOR A0
2#define BUZZER 9
3 
4void setup() {
5    pinMode(RAIN_SENSOR, INPUT);
6    pinMode(BUZZER, OUTPUT);
7    Serial.begin(9600);
8}
9 
10void loop() {
11    int sensorValue = analogRead(RAIN_SENSOR);
12    Serial.println(sensorValue);
13    
14    if (sensorValue < 102) { // Threshold for rain detection
15        digitalWrite(BUZZER, HIGH);
16    } else {
17        digitalWrite(BUZZER, LOW);
18    }
19    delay(1000); // Delay for stability
20}

#define RAIN_SENSOR A0
#define BUZZER 9
 
void setup() {
    pinMode(RAIN_SENSOR, INPUT);
    pinMode(BUZZER, OUTPUT);
    Serial.begin(9600);
}
 
void loop() {
    int sensorValue = analogRead(RAIN_SENSOR);
    Serial.println(sensorValue);
    
    if (sensorValue < 102) { // Threshold for rain detection
        digitalWrite(BUZZER, HIGH);
    } else {
        digitalWrite(BUZZER, LOW);
    }
    delay(1000); // Delay for stability
}

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