Raindrops Detection Sensor Module

🌧️ Raindrop detection sensor module for water/rain sensing
💧 Detects rain droplets and surface moisture
📈 Provides analog output + digital trigger (module dependent)
🎛️ Adjustable sensitivity via onboard potentiometer
⚡ Works with 3.3V/5V microcontrollers
🧩 Ideal for weather stations, smart windows, and irrigation control
🛠️ Easy wiring: VCC, GND, AO, DO
✅ Great for Arduino, ESP32, and IoT outdoor projects

SKU: AB119 Categories: Environmental Sensors, Sensors Tags: Environmental Sensors, Sensors

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Description

The Raindrops Detection sensor module is used for rain detection. It is also for measuring rainfall intensity. Rain sensor can be used for all kinds of weather monitoring and translated into output signals and AO.

Raindrops Detection Sensor Module Rain Weather Module for Arduino, etc. Rain sensor can be used to monitor a variety of weather conditions and turned into several fixed output signal and Analog output.

It includes a printed circuit board (control board) that “collects” the raindrops. As raindrops are collected on the circuit board, they create paths of parallel resistance that are measured via the op-amp. The lower the resistance (or the more water), the lower the voltage output. Conversely, the less water, the greater the output voltage on the analog pin. A completely dry board, for example, will cause the module to output 5V.

The module includes a rain board and a control board that is separate for more convenience. It has a power indicator LED and an adjustable sensitivity through a potentiometer. The module is based on the LM393 op-amp.

Features :

The LM393, use of the wide voltage comparator
Provide both digital and analog output
Output LED indicator
Compatible with Arduino
TTL Compatible
The sensor uses the high-quality FR – 04 double material, the large area of 5.5 * 4.0 CM
Treatment of nickel plating and surface, have fight oxidation, electrical conductivity, and life has more superior performance
The comparator output, signal clean, good waveform, driving ability is strong, for more than 15 mA;
With potentiometer sensitivity adjustment
The output format: digital switch output (0 and 1) and analog AO voltage output;
Has a fixed bolt hole, convenient installation

Package Includes :

1 x Printed Circuit Board for Rain Water Collection

1 x Control Board with LM393 Voltage Comparator

A 5-Wire Dupont Cable

🔌

Pin Connections

1 Table

Pin Connections Table 1

Board	Sensor Pin	Connection
Rain Sensor	VCC/GND/AOUT	3.3-5V / GND / board analog pin

📟

Raindrops Detection Sensor Module

7 Examples • C/C++ | Boards: Arduino Uno, Arduino Nano, Arduino Mega, ESP32, ESP8266, STM32, Raspberry Pi Pico

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Raindrops Detection Sensor Module - Arduino Uno

Raindrops Detection Sensor Module - Arduino Nano

Raindrops Detection Sensor Module - Arduino Mega

Raindrops Detection Sensor Module - ESP32

Raindrops Detection Sensor Module - ESP8266

Raindrops Detection Sensor Module - STM32

Raindrops Detection Sensor Module - Raspberry Pi Pico

📄 File: raindrops_detection_sensor_module_-_arduino_uno.inoArduino Uno

527 characters

1//ekostra.com

2//electronics store in egypt

3//+201008896258

5// Analog pin: A0 on Arduino Uno (ADC range 0-1023, reference 5.0V)

6#define RAIN_PIN A0

8void setup() {

9 Serial.begin(115200);

10}

12void loop() {

13 int raw = analogRead(RAIN_PIN);

14 float voltage = raw * 5.0 / 1023.0;

16 Serial.print("Rain sensor raw: "); Serial.print(raw);

17 Serial.print(" Voltage: "); Serial.print(voltage);

18 Serial.println(raw < 400 ? " -> Wet / Rain detected" : " -> Dry"); // lower reading = more water bridging the plates

20 delay(500);

21}

📄 File: raindrops_detection_sensor_module_-_arduino_nano.inoArduino Nano

528 characters

1//ekostra.com

2//electronics store in egypt

3//+201008896258

5// Analog pin: A0 on Arduino Nano (ADC range 0-1023, reference 5.0V)

6#define RAIN_PIN A0

8void setup() {

9 Serial.begin(115200);

10}

12void loop() {

13 int raw = analogRead(RAIN_PIN);

14 float voltage = raw * 5.0 / 1023.0;

16 Serial.print("Rain sensor raw: "); Serial.print(raw);

17 Serial.print(" Voltage: "); Serial.print(voltage);

18 Serial.println(raw < 400 ? " -> Wet / Rain detected" : " -> Dry"); // lower reading = more water bridging the plates

20 delay(500);

21}

📄 File: raindrops_detection_sensor_module_-_arduino_mega.inoArduino Mega

528 characters

1//ekostra.com

2//electronics store in egypt

3//+201008896258

5// Analog pin: A0 on Arduino Mega (ADC range 0-1023, reference 5.0V)

6#define RAIN_PIN A0

8void setup() {

9 Serial.begin(115200);

10}

12void loop() {

13 int raw = analogRead(RAIN_PIN);

14 float voltage = raw * 5.0 / 1023.0;

16 Serial.print("Rain sensor raw: "); Serial.print(raw);

17 Serial.print(" Voltage: "); Serial.print(voltage);

18 Serial.println(raw < 400 ? " -> Wet / Rain detected" : " -> Dry"); // lower reading = more water bridging the plates

20 delay(500);

21}

📄 File: raindrops_detection_sensor_module_-_esp32.inoESP32

521 characters

1//ekostra.com

2//electronics store in egypt

3//+201008896258

5// Analog pin: 34 on ESP32 (ADC range 0-4095, reference 3.3V)

6#define RAIN_PIN 34

8void setup() {

9 Serial.begin(115200);

10}

12void loop() {

13 int raw = analogRead(RAIN_PIN);

14 float voltage = raw * 3.3 / 4095.0;

16 Serial.print("Rain sensor raw: "); Serial.print(raw);

17 Serial.print(" Voltage: "); Serial.print(voltage);

18 Serial.println(raw < 400 ? " -> Wet / Rain detected" : " -> Dry"); // lower reading = more water bridging the plates

20 delay(500);

21}

📄 File: raindrops_detection_sensor_module_-_esp8266.inoESP8266

523 characters

1//ekostra.com

2//electronics store in egypt

3//+201008896258

5// Analog pin: A0 on ESP8266 (ADC range 0-1023, reference 3.3V)

6#define RAIN_PIN A0

8void setup() {

9 Serial.begin(115200);

10}

12void loop() {

13 int raw = analogRead(RAIN_PIN);

14 float voltage = raw * 3.3 / 1023.0;

16 Serial.print("Rain sensor raw: "); Serial.print(raw);

17 Serial.print(" Voltage: "); Serial.print(voltage);

18 Serial.println(raw < 400 ? " -> Wet / Rain detected" : " -> Dry"); // lower reading = more water bridging the plates

20 delay(500);

21}

📄 File: raindrops_detection_sensor_module_-_stm32.inoSTM32

523 characters

1//ekostra.com

2//electronics store in egypt

3//+201008896258

5// Analog pin: PA0 on STM32 (ADC range 0-4095, reference 3.3V)

6#define RAIN_PIN PA0

8void setup() {

9 Serial.begin(115200);

10}

12void loop() {

13 int raw = analogRead(RAIN_PIN);

14 float voltage = raw * 3.3 / 4095.0;

16 Serial.print("Rain sensor raw: "); Serial.print(raw);

17 Serial.print(" Voltage: "); Serial.print(voltage);

18 Serial.println(raw < 400 ? " -> Wet / Rain detected" : " -> Dry"); // lower reading = more water bridging the plates

20 delay(500);

21}

📄 File: raindrops_detection_sensor_module_-_raspberry_pi_pico.inoRaspberry Pi Pico

533 characters

1//ekostra.com

2//electronics store in egypt

3//+201008896258

5// Analog pin: 26 on Raspberry Pi Pico (ADC range 0-4095, reference 3.3V)

6#define RAIN_PIN 26

8void setup() {

9 Serial.begin(115200);

10}

12void loop() {

13 int raw = analogRead(RAIN_PIN);

14 float voltage = raw * 3.3 / 4095.0;

16 Serial.print("Rain sensor raw: "); Serial.print(raw);

17 Serial.print(" Voltage: "); Serial.print(voltage);

18 Serial.println(raw < 400 ? " -> Wet / Rain detected" : " -> Dry"); // lower reading = more water bridging the plates

20 delay(500);

21}

Project Notes:

Resistive rain-sensing board (analog) + comparator board; this reads the analog board directly.

Specification

WeightWeight	6 g
Dimensions	5,4 × 4 × 1 cm
Product Name	Raindrops Detection Sensor Module
Sensor Type	Rain / Water Detection Sensor
Detection Method	Conductive Surface
Operating Voltage	3.3V – 5V
Output Type	Digital & Analog
Sensitivity Adjustment	Onboard Potentiometer
Response Time	Fast
Indicator	Power & Status LEDs
Control IC	LM393 Comparator
Sensor Plate	Nickel-Plated
Application	Rain Detection, Weather Monitoring, Smart Irrigation, DIY Electronics