How to Make Password Lock System | Simple Arduino Project | Easy to Make Smart Door Lock

In this blog I will show you how you can make your very own Password Enabled Smart Door Locking System using Arduino.

You don’t need to have much of programming knowledge to make this project. Simple, Easy & Effective.

All Things You Need For This Project :

1. Arduino Uno - https://amzn.to/3ez28wN

2. Servo Motor - https://amzn.to/3bAJqD5

3. Keypad - https://amzn.to/2PNzT2N

4. PVC Board - https://amzn.to/3byH6MA

5. Iron Wire

6. Iron Lock

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*/

#include

#include

Servo ServoMotor;

char* password = "888"; // 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] = { 8, 7, 6, 9 };

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

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

int RedpinLock = 12;

int GreenpinUnlock = 13;

void setup()

{

ServoMotor.attach(11);

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(RedpinLock, HIGH);

digitalWrite(GreenpinUnlock, LOW);

ServoMotor.write(11);

}

else

{

digitalWrite(RedpinLock, LOW);

digitalWrite(GreenpinUnlock, HIGH);

ServoMotor.write(90);

}

}