// Importing required libraries
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <BlynkSimpleEsp32.h>

// Define pin connections
const int pirPin = 12; // PIR sensor pin connected to ESP32 pin 12
const int ledPin = 13; // LED pin connected to ESP32 pin 13
const int buzzerPin = 14; // Buzzer pin connected to ESP32 pin 14

// Blynk credentials
char auth[] = "SCPv4_sBbX81bTg04Fnb4RAS1dc1HmLB"; // Blynk Authentication Token
char templateId[] = "TMPL3cGrK5WeW"; // Blynk Template ID
char deviceName[] = "Motion Activated Security Camera"; // Blynk Device Name

// Initialize the LCD display (16x2) with I2C address 0x27
LiquidCrystal_I2C lcd(0x27, 16, 2);

void setup() {
  // Initialize the serial communication for debugging purposes
  Serial.begin(115200);

  // Set up pins as input/output
  pinMode(pirPin, INPUT);
  pinMode(ledPin, OUTPUT);
  pinMode(buzzerPin, OUTPUT);

  // Initialize the LCD display
  lcd.init();
  lcd.backlight();
  lcd.clear();

  // Display a welcome message
  lcd.setCursor(0, 0);
  lcd.print("Welcome!");
  delay(2000);
  lcd.clear();

  // Initialize Blynk with your credentials
  Blynk.begin(auth, "Sardardham", " ", templateId, deviceName);
}

void loop() {
  // Read the PIR sensor state (HIGH if motion detected)
  int pirState = digitalRead(pirPin);

  if (pirState == HIGH) {
    // Motion detected: activate the LED and buzzer
    digitalWrite(ledPin, HIGH);
    digitalWrite(buzzerPin, HIGH);

    // Display the message on the LCD display
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Motion Detected!");

    // Optional: print a message to the serial monitor
    Serial.println("Motion Detected!");

    // Send notification to Blynk app
    Blynk.notify("Alert: Motion Detected!");

  } else {
    // No motion detected: deactivate the LED and buzzer
    digitalWrite(ledPin, LOW);
    digitalWrite(buzzerPin, LOW);

    // Display "Motion Not Detected" message on the LCD
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Motion Not Detected");
  }

  // Run Blynk in the loop
  Blynk.run();
}