#include <Keypad.h> // Include the Keypad library
#include <ESP32Servo.h>

Servo myservo;

String enteredCode = "";

int wrong=0;
// Define the pins for the keypad and door lock
const byte ROWS = 4; // Number of rows on the keypad
const byte COLS = 3; // Number of columns on the keypad
char keys[ROWS][COLS] = { // Define the keys on the keypad
  {'1','2','3'},
  {'4','5','6'},
  {'7','8','9'},
  {'*','0','#'}
};

byte rowPins[ROWS] = {23,22, 3,21 }; // Pins connected to R1, R2, R3, R4 // Connect the keypad column pins to these pins on the ESP32
byte colPins[COLS] = { 19, 18,5 }; // Pins connected to C1, C2, C3, C4
const int lockPin = 2; // Connect the door lock to this pin on the ESP32
const String accessCode = "1234"; // Set the access code to a 6-digit string

Keypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS ); // Create a new Keypad instance

void setup() {
  pinMode(lockPin, OUTPUT); // Set the lock pin to output mode
  pinMode(17,OUTPUT);
  pinMode(32,INPUT);
  myservo.attach(4);
  Serial.begin(9600); // Initialize the serial communication with the ESP32
}

void loop() {
  

    delay(100);
  char key = keypad.getKey(); // Read the input from the keypad
  if (key != NO_KEY) { // If a key is pressed
    tone(17, 1200);
    delay(40);
    noTone(17);

    if (key == '#' || enteredCode.length() >= 6) { // If the user has finished entering the code
        if (enteredCode == accessCode) { // If the code entered matches the access code
            Serial.println("Access granted"); // Print a message to the serial monitor
            tone(17, 3000);
            delay(500);
            noTone(17);
            digitalWrite(lockPin, HIGH); // Unlock the door
            myservo.write(90);
            delay(5000);
            digitalWrite(lockPin, LOW);
            myservo.write(0);
            
                                   }
        else if (enteredCode == accessCode+"*") { // If the code entered matches the access code
            Serial.println("Access granted"); // Print a message to the serial monitor
            tone(17, 3000);
            delay(500);
            noTone(17);
            digitalWrite(lockPin, HIGH); // Unlock the door
            myservo.write(90);

            
                                   }
        
        else if (enteredCode=="*"){
          Serial.println("door is locked");
          digitalWrite(lockPin, LOW);
          myservo.write(0);
        }
      else { // If the code entered does not match the access code
            Serial.println("Access denied"); // Print a message to the serial monitor
            wrong=wrong+1;
            tone(17, 2000);
            delay(500);
            noTone(17);
             }
      enteredCode = "";}// Reset the entered code 
    else { // If the user is still entering the code
          enteredCode += key;
          Serial.println(enteredCode); // Add the entered key to the entered code string
    }
  }
  

}


/*
#include <Keypad.h> // Include the Keypad library
String enteredCode = "";
int wrong=0;
// Define the pins for the keypad and door lock
const byte ROWS = 4; // Number of rows on the keypad
const byte COLS = 3; // Number of columns on the keypad
char keys[ROWS][COLS] = { // Define the keys on the keypad
  {'1','2','3'},
  {'4','5','6'},
  {'7','8','9'},
  {'*','0','#'}
};

byte rowPins[ROWS] = {23,22, 3,21 }; // Pins connected to R1, R2, R3, R4 // Connect the keypad column pins to these pins on the ESP32
byte colPins[COLS] = { 19, 18,5 }; // Pins connected to C1, C2, C3, C4
const int lockPin = 2; // Connect the door lock to this pin on the ESP32
const String accessCode = "1234"; // Set the access code to a 6-digit string

Keypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS ); // Create a new Keypad instance

void setup() {
  pinMode(lockPin, OUTPUT); // Set the lock pin to output mode
  pinMode(17,OUTPUT);
  pinMode(32,INPUT);
  Serial.begin(9600); // Initialize the serial communication with the ESP32
}

void loop() {
  
  if(digitalRead(32)==HIGH){
    wrong=0;
  }
  if(wrong<3){
    delay(100);
  char key = keypad.getKey(); // Read the input from the keypad
  if (key != NO_KEY) { // If a key is pressed
    tone(17, 1200);
    delay(40);
    noTone(17);

    if (key == '#' || enteredCode.length() >= 6) { // If the user has finished entering the code
        if (enteredCode == accessCode) { // If the code entered matches the access code
            Serial.println("Access granted"); // Print a message to the serial monitor
            tone(17, 3000);
            delay(500);
            noTone(17);
            digitalWrite(lockPin, HIGH); // Unlock the door
                                   }
        else if (enteredCode=="*"){
          Serial.println("door is locked");
          digitalWrite(lockPin, LOW);
        }
      else { // If the code entered does not match the access code
            Serial.println("Access denied"); // Print a message to the serial monitor
            wrong=wrong+1;
            tone(17, 2000);
            delay(500);
            noTone(17);
             }
      enteredCode = "";}// Reset the entered code 
    else { // If the user is still entering the code
          enteredCode += key;
          Serial.println(enteredCode); // Add the entered key to the entered code string
    }
  }
  }
  else{
     Serial.println("door has permanet locked");
  }

}
*/