MQ-2 Flammable Gas Sensor with Arduino | Sheekar Banerjee

The MQ-2 Flammable Gas and Smoke Sensor is usually used to detect the presence of flammable or smoke element in the air.

IntermediateFull instructions provided561

MQ-2 Flammable Gas Sensor with Arduino | Sheekar Banerjee

Things used in this project

Hardware components

DFRobot Gravity: Analog Gas Sensor (MQ2) For Arduino

Arduino UNO

Software apps and online services

Arduino IDE

Story

CircuitPlanning:

Arduino UNO R3 --> MQ2 Sensor

Pins--> Vin-->Vcc

Pins--> GND --> GND

Pins--> A0 --> A0

Code:

//Coded and tested by :
// Sheekar Banejee, AI-ML-IOT Solution Engineer and Researcher
int smokeA0 = A0;
// Your threshold value
int sensorThres = 700;
void setup() {
    pinMode(smokeA0, INPUT);
    Serial.begin(9600); //Streaming 9600 bits of Sensor Data per Second
}
void loop() {
    int analogSensor = analogRead(smokeA0);
    Serial.println("Sensor Value: ");
    Serial.println(analogSensor);
    // Checks if it has reached the threshold value
    if (analogSensor > sensorThres)
    {
        Serial.println("Alert! Smoke Detected!");
    }
    else
    {
        Serial.println("Normal...");
    }
    delay(3000);
}

Results:

Serialmonitor:

Code

Program of MQ2 Sensor with Arduino UNO R3

//Coded and tested by :
// Sheekar Banejee, AI-ML-IOT Solution Engineer and Researcher

int smokeA0 = A0;
// Your threshold value
int sensorThres = 700;

void setup() {
  pinMode(smokeA0, INPUT);
  Serial.begin(9600); //Streaming 9600 bits of Sensor Data per Second
}

void loop() {
  int analogSensor = analogRead(smokeA0);

  Serial.println("Sensor Value: ");
  Serial.println(analogSensor);
  // Checks if it has reached the threshold value
  if (analogSensor > sensorThres)
  {
    Serial.println("Alert! Smoke Detected!");
  }
  else
  {
    Serial.println("Normal...");
  }
  delay(3000);
}