How to make Bluetooth FIRE Alert Calling System

 

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CODE 

#include <Wire.h>

#include <LiquidCrystal_I2C.h>

const int PirSensor = 2;

const int Buzzer = 3;

LiquidCrystal_I2C lcd(0x27, 2, 1, 0, 4, 5, 6, 7, 3,POSITIVE);

void setup() {

  Serial.begin(9600);

  pinMode(PirSensor, INPUT);

  pinMode(Buzzer, OUTPUT);

  lcd.begin(16, 2);

  lcd.backlight();

  lcd.setCursor(0, 0);

  lcd.print("  System Ready");

}

void loop() {

  int motionState = digitalRead(PirSensor);

  if (motionState == LOW) {

    Serial.println("1");

    lcd.clear();

    lcd.setCursor(0, 0);

    lcd.print(" Fire Detected");

    lcd.setCursor(0, 1);

    lcd.print("I Start Calling");

    unsigned long startTime = millis();

    while (millis() - startTime < 5000) {

      digitalWrite(Buzzer, HIGH);

      delay(500);

      digitalWrite(Buzzer, LOW);

      delay(500);

    }

    lcd.clear();

    lcd.setCursor(0, 0);

    lcd.print(" System Normal");

  }

}