IoT Based Simple Air Pollution Monitoring System

We are using some simple cost effective materials to make an IoT based air pollution monitoring system.

Dec 8, 2019

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2 respects

environmental sensing

internet of things

monitoring

Components and supplies

Resistor 221 ohm

Buzzer

Grove - Gas Sensor(MQ2)

Breadboard (generic)

5 mm LED: Green

5 mm LED: Red

Arduino UNO

Tools and machines

Soldering iron (generic)

Apps and platforms

Arduino IDE

Project description

Code

Arduino code for this program

csharp

1int redLed = 12;
2int greenLed = 8;
3int buzzer = 10;
4int smokeA0  = A0;
5// Your threshold value
6int sensorThres = 150;
7
8void setup() {
9  pinMode(redLed, OUTPUT);
10  pinMode(greenLed, OUTPUT);
11  pinMode(buzzer,  OUTPUT);
12  pinMode(smokeA0, INPUT);
13  Serial.begin(9600);
14}
15void loop()  {
16  int analogSensor = analogRead(smokeA0);
17  Serial.print("Pin A0: ");
18  Serial.println(analogSensor);
19  // Checks if it has reached the threshold value
20  if (analogSensor > sensorThres)
21  {
22    digitalWrite(redLed, HIGH);
23    digitalWrite(greenLed, LOW);
24    tone(buzzer, 3000, 300);
25  }
26  else
27  {
28    digitalWrite(redLed, LOW);
29    digitalWrite(greenLed, HIGH);
30    noTone(buzzer);
31  }
32  delay(100);
33}

int redLed = 12;
int greenLed = 8;
int buzzer = 10;
int smokeA0  = A0;
// Your threshold value
int sensorThres = 150;

void setup() {
  pinMode(redLed, OUTPUT);
  pinMode(greenLed, OUTPUT);
  pinMode(buzzer,  OUTPUT);
  pinMode(smokeA0, INPUT);
  Serial.begin(9600);
}
void loop()  {
  int analogSensor = analogRead(smokeA0);
  Serial.print("Pin A0: ");
  Serial.println(analogSensor);
  // Checks if it has reached the threshold value
  if (analogSensor > sensorThres)
  {
    digitalWrite(redLed, HIGH);
    digitalWrite(greenLed, LOW);
    tone(buzzer, 3000, 300);
  }
  else
  {
    digitalWrite(redLed, LOW);
    digitalWrite(greenLed, HIGH);
    noTone(buzzer);
  }
  delay(100);
}

Downloadable files

connection diagram

No need of fritzing.It is just a simple connection circuit diagram.

connection diagram

No need of fritzing.It is just a simple connection circuit diagram.

connection diagram

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