Published November 23, 2018 © CC BY

Password Protected Door Locking System

This project will show you how to make your own password-based door lock.

IntermediateFull instructions provided4 hours860

Things used in this project

Hardware components

STEMpedia evive

STEMpedia evive IoT Kit

Software apps and online services

Arduino IDE

Story

Time to cast all your worries about the safety of your home, your workplace, and any of your other go-to place to chill, away! Presenting to you the DIY Password-Based Door Lock! A simple yet effective means to safeguard your home and office by preventing others from entering your room without the correct password. Lie back and relax for your abode and workplace are now protected from attempted break-ins with this easy-to-make DIY security mechanism.

Want to know how to make one for yourself? Then jump aboard!

Step 1: Things You'll Need

evive
4x4 Keypad
Solenoid Lock
12C 2A DC Adapter
Multi Colour RGB Lights
Male to Female Jumper Cable 20cm

Most of the electrical components mentioned above can be found in evive IoT Kit. Many Projects can be made with the help of that Kit. Also, many are even listed on Hackster.

Step 2: The Application

You might have noticed the password protected safe or doors everywhere you go. We are using it with the door. We placed a keypad on the frame of the door.

And have added the solenoid lock at the edge.

The other one you can try is with the electronic safe. We have already made one with the fingerprint sensor. The making of the same can be foundhere.

Step 3: The Connections

We are going to connect the Keypad to evive.

We need to connect the Solenoid to Motor Channel 1 on evive.

Add Neopixel Strip and connect it to evive.

Step 4: Working

The Neopixel that we have installed shows the working status of the keypad lock system.

We have secured the door with a 4 digit code. This code can be set by you from the code.

We have coded the RGB Strip such that the number of lights on the RGB Strip indicates the number of digits of code entered.

The display shows “ENTER PASSWORD”.

If the entered code is WRONG, then the RGB will turn BLUE and the screen shows “ACCESS DENIED”.

And you won’t be able to open the door. But if the code is CORRECT, the RGB will turn GREEN and the screen shows “ACCESS GRANTED”.

Finally, you can now enter through the door.

Once you get the passcode correct, the signal via Motor Channel M1 is sent to solenoid where the magnet attracts the magnets of the slot of the lock. Thus, opening the door.

Step 5: Final Step

Here, the Arduino Code will be uploaded to evive for performing the above actions.

You can download the Arduino Code and the evive library from the code section below:

To know more about Arduino, visit: https://thestempedia.com/tutorials/arduino-ide/

Thus, we can now successfully install our own Password Protected Door Locking System.

For more detailed Instruction visit: https://thestempedia.com/project/diy-pass...

Step 6: Conclusion

With this, the DIY Password-Based Door Lock is ready to make you laugh as the burglars cry! Time to leave your worries behind!

To explore more projects, visit: http://thestempedia.com/projects

Code

#include <Adafruit_NeoPixel.h>
#include<evive.h>
#include<Keypad.h>

void(* resetFunc)(void) =0;

// neo pixel init

#ifdef __AVR__
  #include <avr/power.h>
#endif

#define number_of_neo_pixel 4

unsigned int  neo_pixel_pin= 10;


Adafruit_NeoPixel pixels = Adafruit_NeoPixel(number_of_neo_pixel,neo_pixel_pin, NEO_GRB + NEO_KHZ800);

// keypad init
const byte ROWS = 4;       //four rows
const byte COLS = 4;      //four columns

char keys[ROWS][COLS] = {
{'1','2','3','A'},
{'4','5','6','B'},
{'7','8','9','C'},
{'*','0','#','D'},
};
byte rowPins[ROWS] = {2, 3, 4, 5}; //connect to the row pinouts of the kpd
byte colPins[COLS] = {6, 7, 8,9}; //connect to the column pinouts of the kpd

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

// solenoid lock init
int lockbuttongnd = 28;
int lockbuttoncontrol = 29; 
int lockenable=44;

char key =0;
int check =0;
unsigned int temp =1;

char password[4] = {'1', '2', '3', '4'}; //Any password must have 4 digits      
char inputCode[4] = {'0', '0', '0', '0'};

void setup()
   {
      // put your setup code here, to run once:
  
      Serial.begin(9600);
      pixels.begin(); // This initializes the NeoPixel library
      pixels.show();
    
      // lock button initialization
    
       pinMode(lockenable,OUTPUT);
       pinMode(lockbuttongnd,OUTPUT);
       pinMode(lockbuttoncontrol,OUTPUT);
        
       analogWrite(lockenable,255);
       digitalWrite(lockbuttongnd,LOW);
       digitalWrite(lockbuttoncontrol,LOW);

       tft_init(INITR_BLACKTAB);
       tft.setRotation(1);
       tft.fillScreen(ST7735_BLACK);

       start_screen();

  }

void loop()
   {
       // put your main code here, to run repeatedly:
       if(temp ==1)
          {
             Serial.println(" ENTER PASSWORD");

        tft.setCursor(40,75);
        tft.setTextSize(1);
        tft.setTextColor(ST7735_WHITE,ST7735_BLACK);
        tft.print("ENTER PASSWORD     ");  
             
             temp=2;
             for(unsigned int i=0;i<4;i++)
                {
                   pixels.setPixelColor(i,pixels.Color(150,150,150));
                }
             pixels.show();
             delay(2000);
              for(unsigned int i=0;i<4;i++)
                {
                   pixels.setPixelColor(i,pixels.Color(0,0,0));
                }
             pixels.show();
             
          }
       key = keypad.getKey();

       if(key)
          {
              inputCode[check++] = key;
              pixels.setPixelColor(check-1,pixels.Color(0,0,150));
              pixels.show();
       
          }

        if(check==4)
        {
          check =0;
          delay(200);
          char password[4]= {'1','2','3','4'};

          if((strncmp(inputCode,password,4)==0))
          {
            Serial.println(" access granted ");
            for(unsigned int i=0;i<4;i++)
            {
               pixels.setPixelColor(i,pixels.Color(0,150,0));
            }
            pixels.show();
            digitalWrite(lockbuttoncontrol,HIGH);
            tft.setCursor(40,75);
            tft.setTextSize(1);
            tft.setTextColor(ST7735_WHITE,ST7735_BLACK);
            tft.print("ACCESS GRANTED     ");  
             
            delay(3000);
            resetFunc();
           
          }
          else
          {
            Serial.println(" access denied ");
            tft.setCursor(40,75);
            tft.setTextSize(1);
            tft.setTextColor(ST7735_WHITE,ST7735_BLACK);
            tft.print("ACCESS DENIED       ");  
             
            for(unsigned int i=0;i<4;i++)
            {
              pixels.setPixelColor(i,pixels.Color(150,0,0));
            }
            pixels.show();
            delay(3000);
             for(unsigned int i=0;i<4;i++)
            {
              pixels.setPixelColor(i,pixels.Color(0,0,0));
            }
            pixels.show();
            check=0;
            temp=1;
          }
        }

   }
void start_screen()
    {
        tft.fillScreen(ST7735_BLACK);

        tft.setCursor(25,10);
        tft.setTextSize(2);
        tft.setTextColor(ST7735_WHITE,ST7735_BLACK);
        tft.print("STEMpedia");

        tft.setCursor(28,35);
        tft.setTextSize(1);
        tft.setTextColor(ST7735_GREEN,ST7735_BLACK);
        tft.print("KEYPAD SAFE LOCKER");

        tft.setCursor(60,60);
        tft.setTextSize(1);
        tft.setTextColor(ST7735_GREEN,ST7735_BLACK);
        tft.print("STATUS");  

        tft.setTextColor(ST7735_GREEN,ST7735_BLACK);
        tft.setCursor(0,105);
        tft.setTextSize(1.8);
        tft.print("FOR MORE INFORMATION VISIT");
        tft.setCursor(30,115);
        tft.setTextColor(ST7735_WHITE,ST7735_BLACK);
        tft.print("thestempedia.com");
        
    }

Credits

STEMpedia

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Password Protected Door Locking System

Things used in this project

Hardware components

Software apps and online services

Story

Step 1: Things You'll Need

Step 2: The Application

Step 3: The Connections

Step 4: Working

Step 5: Final Step

Step 6: Conclusion

Schematics

Fritzing Diagram

Code

Arduino Code for the Door Locker

evive Library

Credits

STEMpedia

Comments

Embed the widget on your own site

Password Protected Door Locking System

Password Protected Door Locking System

Things used in this project

Hardware components

Software apps and online services

Story

Step 1: Things You'll Need

Step 2: The Application

Step 3: The Connections

Step 4: Working

Step 5: Final Step

Step 6: Conclusion

Schematics

Fritzing Diagram

Code

Arduino Code for the Door Locker

evive Library

Credits

STEMpedia

Comments

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