#define BLYNK_TEMPLATE_ID "TMPL5R8o4ptO9"
#define BLYNK_TEMPLATE_NAME "Smart Motion Detection Door Lock System"
#include <ESP32Servo.h>
#include <LiquidCrystal_I2C.h>
#include <WiFi.h>
#include <BlynkSimpleEsp32.h>

#define MOTION_SENSOR_PIN 25 
#define SERVO_MOTOR_PIN 14 

bool isMotionDetected = false;
bool isDoorLocked = true;  

Servo doorServo;

LiquidCrystal_I2C lcdDisplay = LiquidCrystal_I2C(0x27, 16, 2);

// Blynk credentials
char auth[] = "YourAuthToken"; // replace with your Blynk Auth Token
char ssid[] = "YourNetworkName"; // replace with your WiFi SSID
char pass[] = "YourPassword"; // replace with your WiFi Password

void setup() {
  Serial.begin(115200);
  Serial.println("Initializing ESP32...");

  pinMode(MOTION_SENSOR_PIN, INPUT); 

  doorServo.attach(SERVO_MOTOR_PIN);
  doorServo.write(0);

  lcdDisplay.init();
  lcdDisplay.backlight();
  lcdDisplay.setCursor(0, 0);
  lcdDisplay.print("Smart Door Lock");

  // Blynk initialization
  Blynk.begin(auth, ssid, pass);
}

void loop() {
  Blynk.run(); // Run Blynk

  isMotionDetected = digitalRead(MOTION_SENSOR_PIN);
  if (isMotionDetected) {
    if(isDoorLocked){
      unlockDoor();
    } else {
      lockDoor();
    }  
  }
  delay(200);
}

void unlockDoor() {
  isDoorLocked = false;
  lcdDisplay.clear();
  lcdDisplay.setCursor(0, 0);
  lcdDisplay.print("Motion Detected");
  lcdDisplay.setCursor(0, 1);
  lcdDisplay.print("Door locked");
  doorServo.write(90);

  delay(5000);             
  isDoorLocked = true;
  lockDoor();
}

void lockDoor() {
  doorServo.write(0);
  lcdDisplay.clear();
  lcdDisplay.setCursor(0, 0);
  lcdDisplay.print("Door unlocked");
}