#define BLYNK_TEMPLATE_ID "TMPL5pmYcTOx1"
#define BLYNK_TEMPLATE_NAME "Smart Home Security System"
#define BLYNK_AUTH_TOKEN "hJ6EP3vQsNewToWmONxFOARZPZfmfJug"



#define BLYNK_PRINT Serial


#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>
#include <Keypad.h>
#include <LiquidCrystal_I2C.h>
#include <ESP32Servo.h>
// Libraries for Smart Home


// Your WiFi credentials.
// Set password to "" for open networks.
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

int relay1=4;
const int motionsensor=33;   // the pin that OUTPUT pin of sensor is connected to
int pinStateCurrent   = LOW; // current state of pin
int pinStatePrevious  = LOW; // previous state of pin
int status1 = LOW;
int inputPin =27;//doorlock


BlynkTimer timer;

// This function is called every time the device is connected to the Blynk.Cloud
BLYNK_CONNECTED()
{

Blynk.syncVirtual(V0);  // will cause BLYNK_WRITE(V0) to be executed
Blynk.syncVirtual(V1);  // will cause BLYNK_WRITE(V1) to be executed

}

LiquidCrystal_I2C lcd(0x27, 20, 4);
// Definitions and Global Variables for Door Lock
const byte ROWS = 4;
const byte COLS = 4;
char keys[ROWS][COLS] = {
  {'1', '2', '3', 'A'},
  {'4', '5', '6', 'B'},
  {'7', '8', '9', 'C'},
  {'*', '0', '#', 'D'}
};
byte rowPins[ROWS] = {12, 13, 14, 19}; // Connect these to the row pinouts of the keypad
byte colPins[COLS] = {32, 18, 25, 26}; // Connect these to the column pinouts of the keypad

Keypad keypad = Keypad(makeKeymap(keys), rowPins, colPins, ROWS, COLS);
const int potPin = A0;
Servo myServo;
const int servoPin = 27; // Connect this to the PWM pin of the servo
bool locked = true;
char enteredCode[5]; // To store the entered code
int codeIndex = 0;



void setup()
{
  // Debug console
Serial.begin(115200);  // initialize serial

Blynk.begin(BLYNK_AUTH_TOKEN, ssid, pass);//connect to blynk
 
pinMode(motionsensor, INPUT); // set arduino pin to input mode to read value from OUTPUT pin of sensor
pinMode(relay1, OUTPUT);   // Initialise digital pin GPIO 16 as an output pin
digitalWrite(relay1, HIGH);
delay(1000);// ensure relay starts off (LED is off)
digitalWrite(relay1, LOW);

// Setup for Door Lock
  myServo.attach(servoPin);
  lcd.init();
  lcd.backlight();
  updateLockStatus();

}
void loop()
{
  Blynk.run();
  timer.run();

  pinStatePrevious = pinStateCurrent; // store old state
  pinStateCurrent = digitalRead(motionsensor);   // read new state

  if (pinStatePrevious == LOW && pinStateCurrent == HIGH) {   // pin state change: LOW -> HIGH
    Serial.println("Motion detected!");
    // TODO: turn on alarm, light or activate a device ... here
    digitalWrite(relay1, HIGH);// trun on relay (and LED)
    Blynk.virtualWrite(V0, 1);
    Blynk.virtualWrite(V1, "Motion Detected");
    Blynk.logEvent("Alert","Motion Detected");
    lcd.clear();
    lcd.print("Motion Detected");  // Display message on LCD
  }
  else
  if (pinStatePrevious == HIGH && pinStateCurrent == LOW) {   // pin state change: HIGH -> LOW
    Serial.println("Motion stopped!");
    // TODO: turn off alarm, light or deactivate a device ... here
    digitalWrite(relay1, LOW);
    Blynk.virtualWrite(V0, 0);
    Blynk.virtualWrite(V1, "Motion Stopped");
    lcd.clear();
    lcd.print("Motion Stopped");  // Display message on LCD
  }
// Loop for Door Lock
  char key = keypad.getKey();
  if (key) {
    handleKeypadInput(key);
  }

}

// Additional functions for Door Lock
void updateLockStatus() {
  if (locked) {
 
  lcd.print("Welcome Home "); // Print the first part of the welcome message
 delay(2000);
    lcd.clear();
    lcd.print("Door Locked");
  } else {
    lcd.clear();
    lcd.print("Door Unlocked");
  }
}
void handleKeypadInput(char key) {
  if (locked) {
    if (key == '#' && codeIndex > 0) { // Check for Enter key
      enteredCode[codeIndex] = '\0'; // Null-terminate the entered code
      codeIndex = 0;

      if (strcmp(enteredCode, "125D") == 0) { // Check if the entered code is correct
        unlockDoor();
        lcd.clear();
        lcd.print("Door Unlocked");
      } else {
        lcd.clear();
        lcd.print("Incorrect Pin!");
        delay(2000); // Display the message for 2 seconds
        lcd.clear();
        lcd.print("Door Locked");
      }
      // Clear entered code
      memset(enteredCode, 0, sizeof(enteredCode));
    } else if (key == 'C' && codeIndex > 0) { // Check for 'C' key to delete
      lcd.setCursor(codeIndex - 1, 1);
      lcd.print(' ');
      codeIndex--;
      enteredCode[codeIndex] = '\0';
    } else if (key != '#' && key != 'C' && codeIndex < sizeof(enteredCode) - 1) {
      enteredCode[codeIndex] = key;
      lcd.setCursor(codeIndex, 1);
      lcd.print('*');
      codeIndex++;
    }
  } else {
    if (key == '*') {
      lockDoor();
      lcd.clear();
      lcd.print("Door Locked");
    }
  }
}
void unlockDoor() {
  locked = false;
  myServo.write(0); // Adjust the angle as per your requirement
}

void lockDoor() {
  locked = true;
  myServo.write(90); // Adjust the angle as per your requirement
}