Finding Weather Conditions Using Rain Sensor With Arduino Mega 2560

Introduction

In this article I will explain about finding weather conditions using Rain Sensor with Arduino Mega 2560. It can be very easy to find the weather conditions at any place.

Parts Of List

• Arduino Mega 2560
• Rain sensor
• Bread Board

Rain Sensor


            Figure 1: Rain Sensor

• The Raindrop Detection Sensor module is an easy-to-use and low cost drop recognition sensor.
  
  
• The sensor works through a series of exposures.
  
  
• Parallel traces on board produce electrical variations when drops or water volume changes.
  
  
• By using microcontrollers or ADC ICs (Arduino and PIC) its fairly easy to convert the analog output from the sensor to digital values.
  
  
• This can be directly read by an Arduino or a comparator circuit if you wish to use it as a rain detection alarm. It can be used to monitor a variety of weather conditions.

Connection

• VCC: positive power supply (3-5V)
• GND: power supply is negative
• DO: TTL switching signal output
• AO: analog signal output.

Programming

/* Flame Sensor analog example.
Code by Reichenstein7 (thejamerson.com)

For use with a Rain Sensor with an analog out!

To test view the output, point a serial monitor such as Putty at your Arduino.


 - If the Sensor Board is completely soaked;
 "case 0" will be activated and " Flood " will be sent to the serial monitor.
  - If the Sensor Board has water droplets on it;
"case 1" will be activated and " Touched " will be sent to the serial monitor.
  - If the Sensor Board is dry;
"case 2" will be activated and " Not Touched " will be sent to the serial monitor.


*/

// lowest and highest sensor readings:

const int sensorMin = 0;

// sensor minimum

const int sensorMax = 1024;

// sensor maximum

void setup()
{
    // initialize serial communication @ 9600 baud:
    Serial.begin(9600);
}
void loop()
{
    // read the sensor on analog A0:

    int sensorReading = analogRead(A0);

    // map the sensor range (four options):
    // ex: 'long int map(long int, long int, long int, long int, long int)'

    int range = map(sensorReading, sensorMin, sensorMax, 0, 3);

    // range value:
    switch (range)
    {
        case 0:

            // Sensor getting wet
            Serial.println("Flood");
            break;

        case 1:

            // Sensor getting wet
            Serial.println("Touched");
            break;

        case 2:

            // Sensor dry - To shut this up delete the " Serial.println("Not Raining");
            " below.
            Serial.println("Not touched");
            break;
    }

    delay(1);
    // delay between reads
}

Explanation

• If the Sensor Board is completely soaked; "case 0" will be activated and "Flood" will be sent to the serial monitor.
  
  
• If the Sensor Board has water droplets on it; "case 1" will be activated and "Touched" will be sent to the serial monitor.
  
  
• If the Sensor Board is dry; "case 2" will be activated and "Not touched" will be sent to the serial monitor.
  
  
• The output in "case 2", "Not Raining" is just for this demonstration.
  
  
• When I used this code in production I omitted the output for this case and just had the alert.

Output


                                       Figure 2:Output

 

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• Pulse Checking Sensor Using Arduino Mega 2560
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