Air Quality Cheker

AirQualityMonitoring

Checkingofairqualitybymeasuringpollutionofamountofgasespresentinair.

CODE FOR PROJECT:

/* Air Pollution Monitoring System

using Arduino and MQ135 Air Quality Sensor

www.Electroduino.com

*/

#include "MQ135.h"

//OLED Display libraries

#include <SPI.h>

#include <Wire.h>

#include <Adafruit_GFX.h>

#include <Adafruit_SSD1306.h>

#define SCREEN_WIDTH 128 // OLED display width, in pixels

#define SCREEN_HEIGHT 64 // OLED display height, in pixels

#define OLED_RESET 4

Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

//In and Out

int RedLed = 9;

int GreenLed = 8;

int Buzzer = 7;

void setup()

{

pinMode(RedLed, OUTPUT); // initialize digital pin RedLed as an output.

pinMode(GreenLed, OUTPUT); // initialize digital pin GreenLed as an output.

pinMode(Buzzer, OUTPUT); // initialize digital pin Buzzer as an output.

// Start serial communication between arduino and your computer

Serial.begin(9600);

//initialize with the I2C addr 0x3C (128x64)

display.begin(SSD1306_SWITCHCAPVCC, 0x3C);

display.clearDisplay();

delay(10);

// Print text on display

display.clearDisplay();

display.setTextSize(1);

display.setTextColor(WHITE);

display.setCursor(0, 0);

display.println("ELECTRODUIN0"); // Print text

display.display();

display.setTextSize(1);

display.setTextColor(WHITE);

display.setCursor(0, 20);

display.println("Air Pollution");

display.display();

display.setTextSize(1);

display.setTextColor(WHITE);

display.setCursor(0, 35);

display.println(" Monitoring");

display.display();

delay(2000);

}

void loop()

{

// Read Senso value

MQ135 gasSensor = MQ135(A0);

float air_quality = gasSensor.getPPM();

// Print Senso value on Serial Monitor Window

Serial.print("Air Quality: ");

Serial.print(air_quality);

Serial.println(" PPM");

Serial.println();

//Print Senso value or Air Quality Index on OLED Display

display.clearDisplay();

display.setCursor(0, 0); //oled display position

display.setTextSize(1);

display.setTextColor(WHITE);

display.println("Air Quality Index");

display.setCursor(0, 20); //oled display position

display.setTextSize(2);

display.setTextColor(WHITE);

display.print(air_quality);

display.setTextSize(1);

display.setTextColor(WHITE);

display.println(" PPM");

display.display();

// when air quality value less than 1000PPM

if (air_quality<=1000)

{

digitalWrite(GreenLed, HIGH); // turn the Green LED on

digitalWrite(RedLed, LOW); // turn the Red LED off

noTone(Buzzer); // turn the Buzzer off

// Print text on OLED Display

display.setTextSize(2);

display.setTextColor(WHITE);

display.setCursor(0, 45);

display.println("Fresh Air"); //Message

display.display();

delay(2000);

}

// when air quality value greater than 1000PPM & less than 2000PPM

elseif( air_quality>=1000 && air_quality<=2000 )

{

digitalWrite(GreenLed, LOW); // turn the Green LED off

digitalWrite(RedLed, HIGH ); // turn the Red LED on

noTone(Buzzer); // turn the Buzzer off

// Print text on OLED Display

display.setTextSize(2);

display.setTextColor(WHITE);

display.setCursor(0, 45);

display.println(" Poor Air"); //Message

display.display();

delay(2000);

}

// when air quality value greater than 2000PPM

elseif (air_quality>=2000 )

{

digitalWrite(GreenLed, LOW); // turn the Green LED off

digitalWrite(RedLed, HIGH); // turn the Red LED on

tone(Buzzer, 1000, 200); // turn the Buzzer on

// Print text on OLED Display

display.setTextSize(2);

display.setTextColor(WHITE);

display.setCursor(0, 45);

display.println("Danger!!"); //Message

display.display();

delay(2000);

}

}