Raindrop Detection Sensor Module

Note

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Kit purchase

Looking for parts? Check out our all-in-one kits below — packed with components, beginner-friendly guides, and tons of fun.

Name	Includes Arduino board	PURCHASE LINK
Elite Explorer Kit	Arduino Uno R4 WiFi	BUY
3 in 1 Ultimate Starter Kit	Arduino Uno R4 Minima	BUY

Course Introduction

In this lesson, we will learn how to use the Raindrop Detection Sensor Module with Arduino.

Note

If this is your first time working with an Arduino project, we recommend downloading and reviewing the basic materials first.

• 1.1 Install Arduino IDE(Important)

• 1.2 Introduce of Arduino IDE

Required Components

In this project, we need the following components:

SN	COMPONENT INTRODUCTION	QUANTITY	PURCHASE LINK
1	Arduino UNO R4 WIFI	1	BUY
2	USB Type-C cable	1
3	Breadboard	1	BUY
4	Wires	Several	BUY
5	Raindrop Detection Sensor Module	1	BUY

Wiring

Common Connections:

Raindrop Detection Sensor Module

• D0: Connect to 7 on the Arduino.

• GND: Connect to breadboard’s negative power bus.

• VCC: Connect to breadboard’s passive power bus.

Writing the Code

Note

• You can copy this code into Arduino IDE.

• Don’t forget to select the board(Arduino UNO R4) and the correct port before clicking the Upload button.

/*
  This code reads the digital value from a raindrops detection sensor module connected to
  pin 7 and prints it to the serial monitor every 50 milliseconds.
  When the rainwater on the sensor reaches the threshold,
  the DO output is low and the indicator light is on.

  Board: Arduino Uno R3 (or R4)
  Component: Raindrops Detection Sensor Module
*/

// Digital pin connected to the raindrop sensor
const int sensorPin = 7;

void setup() {
  pinMode(sensorPin, INPUT);  // Set the sensor pin as input
  Serial.begin(9600);         // Start serial communication
}

void loop() {
  Serial.println(digitalRead(sensorPin));  // Read and print the sensor state
  delay(50);                               // Sampling interval
}