Arduino code for mobile anti theft device

 

Arduino Code 

#include <LiquidCrystal.h>

const int rs = 12;    // Register Select pin of LCD

const int en = 11;    // Enable pin of LCD

const int d4 = 5;     // Data pin 4 of LCD

const int d5 = 4;     // Data pin 5 of LCD

const int d6 = 3;     // Data pin 6 of LCD

const int d7 = 2;     // Data pin 7 of LCD

const int buttonPin = 7;  // Pin for the push button

const int buzzerPin = 8;  // Pin for the buzzer

LiquidCrystal lcd(rs, en, d4, d5, d6, d7);

int buttonState = 0;       // Variable for storing button state

bool isMobileSafe = false; // Flag to track if the mobile is safe

bool buzzerPlaying = false; // Flag to track if the buzzer is playing

void setup() {

  lcd.begin(16, 2);        // Initialize the LCD

  pinMode(buttonPin, INPUT_PULLUP); // Set the button pin as input with internal pull-up resistor

  pinMode(buzzerPin, OUTPUT);

  lcd.print("Made By Sufian");

    delay(1000);

}

void loop() {

  buttonState = digitalRead(buttonPin); // Read the button state

  if (buttonState == LOW) { // Button is pressed

    if (!isMobileSafe) {   // Check if mobile is not safe

      if (buzzerPlaying) { // If the buzzer was playing, stop it

        noTone(buzzerPin);

        buzzerPlaying = false;

      }

      lcd.clear();           // Clear the LCD

      lcd.setCursor(0, 0);  // Set the cursor to the beginning of the first line

      lcd.print("Mobile is safe");

      isMobileSafe = true;  // Set the flag to indicate the mobile is safe

    }

  } else { // Button is not pressed

    if (isMobileSafe) { // Mobile is safe

      lcd.clear();     // Clear the LCD

      lcd.setCursor(0, 0);  // Set the cursor to the beginning of the first line

      lcd.print("Mobile Taken");

      isMobileSafe = false; // Reset the flag

      if (!buzzerPlaying) { // If the buzzer wasn't playing, start it with a high frequency

        tone(buzzerPin, 2000); // Adjust the frequency as needed for a high-pitched sound

        buzzerPlaying = true;

      }

    }

  }

}