#define BLYNK_TEMPLATE_ID "TMPL6dUfFQIFc"
#define BLYNK_TEMPLATE_NAME "Quickstart Template"
#define BLYNK_AUTH_TOKEN "zW6lw0CTYb8KbbegweuWR0cEeQhORF4k"


//ຫລັງຈາກ ລັນແລ້ວ ແມ່ນໄຫ້ກົດປູ່ມ * ກ່ອນແລ້ວຄ່ອຍກົດ Password
//password man ABC

#include <Keypad.h>
#include <Servo.h>
#include <LiquidCrystal_I2C.h> // Library for LCD


#define ROW_NUM    4  // four rows
#define COLUMN_NUM 4  // four columns
#define SERVO_PIN  A0 // // the Arduino pin, which connects to the servo motor

Servo servo; // servo motor
LiquidCrystal_I2C lcd(0x27, 16, 2);

int buzzerPin = 13;
int led_red = 11;
int led_green = 12;


char keys[ROW_NUM][COLUMN_NUM] = {
  {'1', '2', '3', 'A'},
  {'4', '5', '6', 'B'},
  {'7', '8', '9', 'C'},
  {'*', '0', '#', 'D'}
};


byte pin_rows[ROW_NUM] = {9, 8, 7, 6}; //connect to the row pinouts of the keypad
byte pin_column[COLUMN_NUM] = {5, 4, 3, 2}; //connect to the column pinouts of the keypad


Keypad keypad = Keypad( makeKeymap(keys), pin_rows, pin_column, ROW_NUM, COLUMN_NUM );


const String password_1 = "ABC"; // change your password here
   // change your password here
String input_password;


int angle = 0; // the current angle of servo motor
unsigned long lastTime;


void setup() {
  Serial.begin(9600);
  input_password.reserve(32); // maximum password size is 32, change if needed

  lcd.init(); //initialize the lcd
  lcd.backlight(); 

  servo.attach(SERVO_PIN);
  servo.write(0); // rotate servo motor to 0°
  lastTime = millis();
  pinMode(buzzerPin, OUTPUT);
  pinMode(led_red, OUTPUT);
  pinMode(led_green, OUTPUT);
  
}


void loop() {
 
  
  char key = keypad.getKey();
   

  if (key) {
    Serial.println(key);
    
    if (key == '*') {
      lcd.print("Enter Pass:...."); 
     
      input_password = ""; // reset the input password
    } else if (key == '#') {

      if (input_password == password_1 ) {
        lcd.clear(); 
        lcd.print("Correct");
        Serial.println("The password is correct, rotating Servo Motor to 90°");
        angle = 90;
        servo.write(angle);
        lastTime = millis();
        digitalWrite(buzzerPin , HIGH);
        tone(buzzerPin, 500, 500);
        digitalWrite(led_green, HIGH);
        digitalWrite(led_red, LOW);

        delay(5000);
        lcd.clear(); 
        digitalWrite(led_green,LOW);
        lcd.print("Enter Pass:...."); 
      } else {
        lcd.clear();
        lcd.print("Pass is wrong");
        digitalWrite(led_red, HIGH);
        digitalWrite(led_green,LOW);
        digitalWrite(buzzerPin ,HIGH);
        tone(buzzerPin, 100, 5000);


        delay(5000);
        digitalWrite(led_red,LOW);
        lcd.clear();
        lcd.print("Enter Pass:....");  
        
      }
      


      input_password = ""; // reset the input password
    } else {
      input_password += key; // append new character to input password string
    }
  }


  if (angle == 90 && (millis() - lastTime) > 5000) { // 5 seconds
    angle = 0;
    servo.write(angle);
    Serial.println("Rotating Servo Motor to 0°");
  }
  
  
}