IoT Practical Questions with Solutions and Diagrams

  

    
    const int gasSensorPin = A0;
const int buzzerPin = 8;
const int threshold = 400;

void setup() {
  Serial.begin(9600);
  pinMode(buzzerPin, OUTPUT);
}

void loop() {
  int gasValue = analogRead(gasSensorPin);
  Serial.print("Gas Concentration: ");
  Serial.println(gasValue);

  if (gasValue > threshold) {
    digitalWrite(buzzerPin, HIGH);
  } else {
    digitalWrite(buzzerPin, LOW);
  }

  delay(500);
}