How to Make Gas Leak Detector & Auto Exhaust Fan Using Arduino

Video :-

Circuit Diagram :-

Code :-

//Prateek //www.prateeks.in #include <Wire.h> #include <LiquidCrystal_I2C.h> LiquidCrystal_I2C lcd(0x27, 20, 4); #include <SoftwareSerial.h> SoftwareSerial mySerial(9,8); int gasValue = A0; int data = 0; int relay = 6; int pir_Status; int buzzerPin = 7; void setup() { randomSeed(analogRead(0)); mySerial.begin(9600); Serial.begin(9600); lcd.init(); lcd.backlight(); pinMode(gasValue, INPUT); pinMode(relay, OUTPUT); pinMode(buzzerPin, OUTPUT); lcd.setCursor(2,0); lcd.print ("WELCOME TO "); lcd.setCursor(2,1); lcd.print ("JUSTDOELECTRONICS"); lcd.setCursor(6,2); lcd.print ("DESIGN By :-"); lcd.setCursor(6,3); lcd.print ("PRATEEK"); delay(3000); lcd.clear(); } void loop(){ data = analogRead(gasValue); Serial.print("Gas Level: "); Serial.println(data); lcd.clear(); lcd.setCursor(1,0); lcd.print ("Exhaust fan :- OFF"); lcd.setCursor(2,1); lcd.print("Gas Level: "); lcd.print(data); delay(1000); if ( data > 700) { SendMessage(); Serial.print("Gas detect alarm"); lcd.clear(); lcd.setCursor(1,0); lcd.print ("Exhaust fan :- ON"); lcd.setCursor(2,2); lcd.print("Gas Level Exceed"); lcd.setCursor(2,3); lcd.print("SMS Sent"); delay(1000); digitalWrite(buzzerPin, HIGH); digitalWrite(relay, HIGH); } else { Serial.print("Gas Level Low"); lcd.clear(); lcd.setCursor(2,3); lcd.print("Gas Level Normal"); delay(1000); digitalWrite(buzzerPin, LOW); digitalWrite(relay, LOW); } //lcd.clear(); } void SendMessage() { delay(1000); }


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