#include <Keypad.h>
#include <ezBuzzer.h>
#include <Servo.h>
#define SERVO_PIN  A0
Servo myservo;

const int ROW_NUM = 4; //four rows
const int COLUMN_NUM = 3; //three columns
int led = 12;                // the pin that the LED is atteched to
int sensor = 11;              // the pin that the sensor is atteched to
int state = LOW;             // by default, no motion detected
int val = 0; 

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

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}; //connect to the column pinouts of the keypad

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

const String password = "1234"; // change your password here
String input_password;
const int busser = 10;
int angle = 0;
unsigned long lastTime;
ezBuzzer buzzer(busser);
void setup(){
  Serial.begin(9600);
  input_password.reserve(32); // maximum input characters is 33, change if needed
  pinMode(busser, OUTPUT);
  myservo.attach(SERVO_PIN); 
  myservo.write(0);
  lastTime = millis();
  pinMode(led, OUTPUT);      // initalize LED as an output
  pinMode(sensor, INPUT);    // initialize sensor as an input
  
}
 
void loop(){
  char key = keypad.getKey();
  
  if (angle == 90 && (millis() - lastTime) > 5000) { // 5 seconds
   angle = 0;
   myservo.write(angle);
    Serial.println("Rotating Servo Motor to 0°");
   }
  if (key) {
    Serial.println(key);
       
    if(key == '*')
     {
       input_password = ""; // clear input password
     } else if(key == '#') 
    {
        if(password == input_password) {
        Serial.println("password is correct");
        angle = 90;
        myservo.write(angle);
        lastTime = millis();
        // DO YOUR WORK HERE
        
      }
       else if(password != input_password) {
        Serial.println("password is incorrect, try again");
        tone(busser, 1000);
        delay(1000); 
        noTone(busser);
        delay(1000);
     }
   
     input_password = ""; // clear input password
    } 
   else 
   {
    input_password += key; // append new character to input password string
   }
  }
    
    MotionSensor();
}
 

int MotionSensor() {
  
 val = digitalRead(sensor);   // read sensor value
  if (val == HIGH) {           // check if the sensor is HIGH
    digitalWrite(led, HIGH);   // turn LED ON
    delay(500);                // delay 100 milliseconds 
    
    if (state == LOW) {
      Serial.println("Motion detected!"); 
      state = HIGH;       // update variable state to HIGH
    }
  } 
  else {
      digitalWrite(led, LOW); // turn LED OFF
      delay(500);             // delay 200 milliseconds 
      
      if (state == HIGH){
        Serial.println("Motion stopped!");
        state = LOW;       // update variable state to LOW
    }
  }
  
}