Smoke Detector And Fire Alarm System Using Arduino And Gsm

Just Do Electronics August 04, 2020

Circuit Diagram :-

Code :-

 
//Prateek
//www.prateek.in

#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 16, 2);
 
const int redLed = 4;
 int greenLed = 6;
const int buzzer = 5;
int smokeA0 = A0;

const int flame = 2;
int Flame = HIGH;

int sensorThres = 150;
 
void setup() {
  
  pinMode(redLed, OUTPUT);
  pinMode(buzzer, OUTPUT);
  pinMode(greenLed, OUTPUT);
  pinMode(smokeA0, INPUT);
  pinMode(flame, INPUT);

  lcd.init();
  lcd.backlight();
  lcd.clear();
  Serial.begin(9600);
  lcd.begin(16,2);
}
 
void loop() {
  int analogSensor = analogRead(smokeA0);
  Serial.print("Pin A0: ");
  Serial.println(analogSensor);
  lcd.print("Smoke Level: ");
  lcd.print(analogSensor-50);
   lcd.setCursor(0, 1);
   lcd.print("Flame low");
   
  Flame = digitalRead(flame);
  if (Flame== LOW)
  {
    lcd.setCursor(0, 1);
    lcd.print("Flame High");
    digitalWrite(redLed, HIGH);
    delay(5000);
    digitalWrite(buzzer, HIGH);
    delay(5000);
    digitalWrite(greenLed, LOW);
  }
  
  if (analogSensor-50 > sensorThres)
  {
    digitalWrite(redLed, HIGH);
    digitalWrite(buzzer, HIGH);
    
     Serial.println("AT+CMGF=1");                    
     delay(1000);                                     
     Serial.println("AT+CMGS=\"+918830584864\"\r");  
     Serial.println("Flre And Smoke Alert");                     
     Serial.println((char)26);
  
    digitalWrite(greenLed, LOW);
    
  }
  else
  {
    digitalWrite(redLed, LOW);
    digitalWrite(greenLed, HIGH);
     digitalWrite(buzzer, LOW);
    
  }
  delay(500);
  lcd.clear();
}

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