Code and Circuit Diagram for Password Door Lock Security System / akshit innovation lab

//AKSHITS INNOVATION LAB https://www.youtube.com/c/AKSHITSINNOVATIONLAB

//Password Door Lock Security System

#include <Keypad.h>

char* password = "189"; // change the password here, just pick any 3 numbers

int position = 0;

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] = { 9, 8, 7, 6 };

byte colPins[COLS] = { 5, 4, 3, 2 };

Keypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS );

int Lock = 13;

void setup()

{

pinMode(Lock, OUTPUT);

LockedPosition(true);

}

void loop()

{

char key = keypad.getKey();

if (key == '*' || key == '#')

{

position = 0;

LockedPosition(true);

}

if (key == password[position])

{

position ++;

}

if (position == 3)

{

LockedPosition(false);

}

delay(100);

}

void LockedPosition(int locked)

{

if (locked)

{

digitalWrite(Lock, LOW);

}

else

{

digitalWrite(Lock, HIGH);

}

}