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Smoke Detector Using Mq2 Sensor
Just Do Electronics
August 03, 2020
Video :-
Circuit Diagram :-
Code :-
//Prateek //www.prateeks.in #include
LiquidCrystal_I2C lcd(0x27, 16, 2); const int buzzerPin = 5; int redled = 4; int greenled = 6; #define gasPin A0 void setup() { lcd.init(); lcd.backlight(); lcd.clear(); Serial.begin(9600); lcd.begin(16, 2); pinMode(buzzerPin, OUTPUT); pinMode(redled, OUTPUT); pinMode(greenled, OUTPUT); lcd.setCursor(0, 0); lcd.print("Calibrating"); for(int i = 0; i <10; i++){ if (i==4) { lcd.setCursor(0, 1); lcd.print("."); } else lcd.print("."); delay(500); } lcd.setCursor(5, 1); lcd.print("done"); delay(1000); lcd.clear(); lcd.setCursor(1, 0); lcd.print("SENSOR ACTIVE"); delay(1500); lcd.clear(); } void loop() { int gasSensor = analogRead(gasPin); if (gasSensor > 250) { digitalWrite(buzzerPin, HIGH); digitalWrite(redled, HIGH); digitalWrite(greenled, LOW); lcd.setCursor(0, 0); lcd.print("Value : "); lcd.print(gasSensor); Serial.print(gasSensor); Serial.print("\t"); lcd.setCursor(0, 1); Serial.println("Gas is Detected"); lcd.print("Gas is Detected"); delay(300); lcd.clear(); } else if (gasSensor < 350) { digitalWrite(buzzerPin, LOW); digitalWrite(greenled, HIGH); digitalWrite(redled, LOW); lcd.setCursor(0, 0); lcd.print("Value : "); lcd.print(gasSensor); Serial.print(gasSensor); Serial.print("\t"); lcd.setCursor(0, 1); Serial.println("No Gas"); lcd.print("No Gas"); delay(300); } }
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