+966540842818

#include <Servo.h>
#include <Keypad.h>

Servo myservo;

const int ROW_NUM = 4; //four rows
const int COLUMN_NUM = 4; //three columns

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 = "1234"; // change your password here
const String password_2 = "5642"; // change your password here
const String password_3 = "4545"; // change your password here
String input_password;

//*********************************************************************
//||||||||||||||||||| Flags Setup to Know Password Status |||||||||||||
//*********************************************************************
int flag_p1 = 0; // 0 = password not entered yet
int flag_p2 = 0; // 1 = password was entered
int flag_p3 = 0;
//*********************************************************************


void setup() {
  Serial.begin(9600);
  input_password.reserve(5);
  myservo.attach(10); // maximum input characters is 5, change if needed

  //*********************************************************************
  //||||||||||||||||||| Setting Flags to 0 when Restart |||||||||||||||||
  //*********************************************************************
  flag_p1 = 0;
  flag_p2 = 0;
  flag_p3 = 0;
  //*********************************************************************
}

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

  if (key) {
    Serial.println(key);

    if (key == 'C') {
      input_password = ""; // reset the input password
    }
    else if (key == '*') {
      //*********************************************************************
      //||||||||||||||||||| Conditions for Password #1 ||||||||||||||||||||||
      //*********************************************************************
      if (input_password == password_1 && flag_p1 == 0) {
        flag_p1 = 1;
        Serial.println("password is correct");
        runServo();
      }
      else if (input_password == password_1 && flag_p1 == 1) {
        Serial.println("password entered before, try diffrent password");
      }
      //*********************************************************************
      //||||||||||||||||||| Conditions for Password #2 ||||||||||||||||||||||
      //*********************************************************************
      else if (input_password == password_2 && flag_p2 == 0) {
        flag_p2 = 1;
        Serial.println("password is correct");
        runServo();
      }
      else if (input_password == password_2 && flag_p2 == 1) {
        Serial.println("password entered before, try diffrent password");
      }
      //*********************************************************************
      //||||||||||||||||||| Conditions for Password #3 ||||||||||||||||||||||
      //*********************************************************************
      else if (input_password == password_3 && flag_p3 == 0) {
        flag_p3 = 1;
        Serial.println("password is correct");
        runServo();
      }
      else if (input_password == password_3 && flag_p3 == 1) {
        Serial.println("password entered before, try diffrent password");
      }
      //*********************************************************************
      //|||||||||||||||||| Condition to reset All Flags |||||||||||||||||||||
      //*********************************************************************
      else if (input_password == "ABAD") {
        Serial.println("All Flags Reset");
        flag_p1 = 0;
        flag_p2 = 0;
        flag_p3 = 0;
      }
      //*********************************************************************
      //|||||||||||||||||| Condition for Wrong Password |||||||||||||||||||||
      //*********************************************************************
      else {
        Serial.println("password is incorrect, try again");
      }
      //*********************************************************************

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

}//end of Loop


//*********************************************************************
//|||||||||||||||||| Function to run the Servo ||||||||||||||||||||||||
//*********************************************************************
void runServo() {
  Serial.println("ON");
  myservo.write(0);
  delay(3000);
  myservo.attach(10);
  delay(3000);
  myservo.detach();//Stop
  delay(2000);
}
//*********************************************************************