Published March 23, 2017 © GPL3+

Smart Lock - Internet connected door lock with door bell

It's a Wi-Fi video door lock with doorbell which lets you control your door lock from anywhere around the world

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Smart Lock - Internet connected door lock with door bell

Things used in this project

Hardware components

OLED Display

Adafruit 16mm Illuminated Pushbutton - Green Momentary

Adafruit 16mm Illuminated Pushbutton - White Momentary

JQC-3F(T73) DC 12V 5PIN Power Relay

Logitech C270 Webcam

https://www.adafruit.com/products/419

Buzzer

LM2596 power Supply Buck Converter step-down module

Photo Coupler PC817

Resistor 10k ohm

Resistor 1k ohm

Resistor 100 ohm

General Purpose Transistor NPN

Magnetic lock with read switch

LED (generic)

1N4007 – High Voltage, High Current Rated Diode

1N4742

Wall AC to 12V, 2A DC adapter

SparkFun DC Barrel Jack Adapter

Software apps and online services

Arduino IDE

MobaXterm

PuTTY

Phonegap

Hand tools and fabrication machines

Laser cutter (generic)

Other stuff like drilling machine, drill bits, screw driver, screws, clamps etc

Story

About Smart Lock:

Smart Door Lock with Door Bell is a IoT device built using MediaTek Linkit smart 7688 duo which is interfaced with a Oled Display, A keypad, A Magnetic Door Lock with Read Switch and a USB Camera. The prototype connects to internet via Wi-Fi to send video stream and notifications to android app through internet. Whenever someone presses the door bell button connected to the LinkIt, it pops up a alert on the android app on which the video stream from the camera connected to LinkIt can be seen live. Using the app, the user can remotely lock and unlock the door as well. A keypad and display is also available on the device to set temporary authentication codes and permanent authentication codes to unlock the door lock.

Demo video of working prototype:

Architecture:

Steps to build the prototype are as follows:

Step 1:

Follow the steps given in link below to sign in into Web UI of the 7688 Duo Board:

https://docs.labs.mediatek.com/resource/linkit-smart-7688/en/get-started/get-started-with-the-linkit-smart-7688-duo-development-board/sign-in-to-the-web-ui-of-the-7688-duo-board

Step 2:

Follow the steps given in link below to setup WiFi SSID and password of the router to which LinkIt should connect via WiFi:

https://docs.labs.mediatek.com/resource/linkit-smart-7688/en/get-started/get-started-with-the-linkit-smart-7688-duo-development-board/connect-to-the-internet-with-linkit-smart-7688-duo-development-board

Step 3:

Once you have setup the Wi-Fi SSID and password of your router on the LinkIt, the device will get switched from Access Point Mode to Station Mode and connect to your router. You can check this by opening your router's UI and check the LinkIt device in the connected devices list as shown in the screen shot below:

Note down IP address of the LinkIt Smart 7688 duo that you see in your router page, in my case its 192.168.4.3 as highlighted in above screenshot

Step 4:

Open any terminal software like Putty and login into the console of LinkIt using the IP address of the LinkIt via SSH

click on "Yes" when the Security Alert pops up

It will prompt for the username

Enter user name as "root" and default password or the password you set in Step 1.

Once you have logged in, you will be able to see the console as shown in the screenshot above

Step 5:

Connect the components as per circuit diagram given below:

As shown in the video, I have divided the above schematic to fit on two boxes called the outdoor unit and the indoor unit

The outdoor unit with the Camera, Display, Keypad and the Push button which is used as door bell button

then the indoor unit which contains everything else from the schematic which includes the Voltage regulator, LinkIt board, relay circuit, another push button, buzzer

and the magnetic lock which connects to the indoor unit

The step files of the laser cut acrylic parts are available in the CAD files section of the project if you want to use it, but after laser cutting I drilled holes and cutouts manually using the the hand drill and cutters

Step 6:

Follow the steps given in link below to add LinkIt smart board to your Arduino IDE:

https://docs.labs.mediatek.com/resource/linkit-smart-7688/en/get-started/get-started-with-the-linkit-smart-7688-duo-development-board/install-arduino-ide-with-board-support-package

Step 7:

Follow the steps given in links below

https://docs.labs.mediatek.com/resource/linkit-smart-7688/en/get-started/get-started-with-the-linkit-smart-7688-duo-development-board/install-the-linkit-smart-7688-duo-com-port-driver

https://docs.labs.mediatek.com/resource/linkit-smart-7688/en/get-started/get-started-with-the-linkit-smart-7688-duo-development-board/create-and-run-your-first-example

to upload the ArduinoMain.ino code available in Code section of this project into the ATmega 32U4 on LinkIt using Arduino IDE

You will need the following two libraries installed in the Arduino Libraries directory to compile the code successfully

HCMatrixKeypad Library

U8glib Library

Step 8:

Now we will go ahead to interface the camera with the LinkIt.

Connect the USB Camera to USB Host port on LinkIt using a OTG cable.

Once you have connected the camera, you can go ahead and power the development board on, and login into the console and check whether the camera has been detected or not by checking the list of items on the /dev directory as shown in the screenshot below

if you see the video0 on the list as highligted in the above image, it means your camera is connected properly, you can go ahead to stream the camera on the local server

The mjpg_streamer package comes pre-installed in the LinkIt firmware, so we can use the following command to test the camera streaming using it

mjpg_streamer -i "input_uvc.so -d /dev/video0 -r 640x480 -f 25" -o "output_http.so -p 8080 -w /www/webcam"

You can see in the above screenshot that the TCP port is 8080 on which the streaming is happening, so if you point your browser to your LinkIt's IP address followed by port 8080 i.e. http://192.168.4.3:8080 in my case you will see the video streaming from the camera as shown in screenshot below

Now that we are able to stream the cam feed, we can make this command run the camera streaming automatically when LinkIt boots up, to do this edit the /etc/rc.local file on the LinkIt using vim editor

vim /etc/rc.local

the modified /etc/rc.local file looks as shown in the picture below

once you have save the rc.local file as shown in screenshot above, it will automatically start streaming the video from USB camera connected to the LinkIt whenever its turned on.

Step 9:

Now we will create a directory on the home folder named app and create the app.js and index.html files inside it

mkdir app

once you have created the directory you will be able to see it when you use the ls command

ls

now move into the app directory by using cd command

cd app

now install socket.io using npm inside the app directory

npm install --save socket.io

Once you have installed socket.io successfully without any errors you can see the socket.io directory inside the nodemodules directory that will be automatically created inside the app directory after successful installation of socket.io in previous step which you can see as shown in the screenshot below:

Now we can go ahead and create the app.js file and index.html files inside the app directory using vim text editor

vim app.js

app.js code is made available in the Code section of the project

once you insert the code into the app.js file, you can save it using the :wq command and quit from the vim editor

similarly create the index.html file also which available in the Code section inside the app directory using vim text editor

Note: Change the IP address highlighted in the below screenshot of the code to your LinkIt's IP address, as mentioned previously in my case the IP address of my LinkIt is 192.168.4.3 which you can see in the screenshot below

once you have created it, your app directory will look as shown in the screen shot below:

once you have these files ready inside the app directory we can move ahead and test the device by running the NodeJs application

node app.js

If you get the output as shown in screen shot above, your code is running without error, you can point your browser to your LinkIt IP address at port 4000, in my case http://192.168.4.3:4000 where you will will see the web app as shown in screenshot below

As you can see, the web app has the status as Begun, and you can Lock, Unlock and Generate temporary pin by clicking the buttons on the web app and you can also see the outputs in the console when the Lock is locked, Unlocked, and other status updates as shown in snapshot below

Like we did in Step 8 to run the camera streaming at bootup, we need make the NodeJS server also to run at bootup, to do this we will similarly edit the rc.local file to as shown shown in picture below

node /root/app/app.js

once you save the rc.local file as shown in screen shot above, you will be able to see that the NodeJS server runs automatically after boot up.

Note: The index.html code has css class named rotate180 which is used in the line of code as shown in the below snippet

<img src="http://192.168.4.3:8080/?action=stream" height="300" width="340" class="rotate180" />

this is used because I have mounted my camera upside down on the outdoor unit, if you are mounting your camera straightly, you can remove that class attribute from the line of code, then the modified line will be as shown below

<img src="http://192.168.4.3:8080/?action=stream" height="300" width="340" />

Step 10:

To connect the device to the internet and make it accessable via your public IP address provided by your internet service provider (ISP), you should port forward the port 4000 which is used by the NodeJS server and the port 8080 which is used by the video streamer

Every router has a different way to do it, the screen shot shown below is my router's port forward screen

You can see the above screen shot that I have port forwarded port 8080 and 4000. Once you have done it, any request coming to particular port 4000 and 8080 on your public IP provided by your ISP will be redirected by the router to the LinkIT device.

If you don't know what is your public ip, you can type in google "what is my ip" and you will get it as shown in screen shot below

Now, if point at this public IP address followed by port number 8080 you will be able to see the video feed from any computer or mobile device that is connected to the internet around the world, similarly you can point at the port 4000 to use the web app

Note: Make sure you change the IP from local IP of your LinkIt to public IP of your router on the index.html to use the web app running on LinkIt from a different location i.e. outiside your LAN

Step 11: Using the Android App to control the device from anywhere around the world via Internet

If you want to use an Android App instead of the Web App to control the device both when you are in the local network as well as on the public network when you are connected to some other router in some other part of the world, I have built a small android app which might come in handy in that case which I also showed in the video. You can download the apk by clicking on the Download Apk button given below or download the source code of the phonegap project file i.e. the source code of Apk and build it on your own:

Download Apk

Phonegap Project

You can install this Apk on your android phone and set it up either to use the public IP or to use the local IP without worrying about changing the IP address on the index.html page on the device to control the Smart Lock device remotely

Screen Shots of Apk:

Shows local IP in this screenshot

Screen Recording Video of App:

I guess I have shared all the information needed to replicate this project. Just in case if you face any issues, you can type in on the comments section below, I will be ready to help.

Schematics

Code

var http = require('http');
var fs = require('fs');
var index = fs.readFileSync('/root/app/index.html');
//serialport
var serialport = require("serialport");
var SerialPort = serialport.SerialPort;
var serialPort = new SerialPort("/dev/ttyS0", {
    baudrate: 9600,
    parser: serialport.parsers.readline("\n")
});
var app = http.createServer(function(req, res) {
    res.writeHead(200, {
        'Content-Type': 'text/html'
    });
    res.end(index);
});
var io = require('socket.io')(app);
app.listen(4000);
console.log("4000");
serialPort.on("open", function() {
    console.log('Console open');
    serialPort.write('Begin.');
    serialPort.on('data', function(data) {
        console.log(data);
        io.emit('data', data);
    });
});
io.on('connection', function(socket) {
    console.log('connected');
    socket.on('lock', function(msg) {
        console.log(msg);
        serialPort.write('LOCKIT.');
    });
    socket.on('pin', function(msg) {
        serialPort.write(msg + ".");
        console.log(msg);
    });
    socket.on('unlock', function(msg) {
        console.log(msg);
        serialPort.write('UNLOCKIT.');
    });
});

<html>

<head>
    <style>
        .rotate180 {
            -webkit-transform: rotate(180deg);
            -moz-transform: rotate(180deg);
            -o-transform: rotate(180deg);
            -ms-transform: rotate(180deg);
            transform: rotate(180deg);
        }
        
        .button {
            background-color: #4CAF50;
            border: none;
            color: white;
            padding: 15px 82px;
            text-align: center;
            text-decoration: none;
            display: inline-block;
            font-size: 16px;
            margin: 4px 2px;
            cursor: pointer;
        }
        
        .button1 {
            background-color: #477fd8;
            border: none;
            color: white;
            padding: 15px 142px;
            text-align: center;
            text-decoration: none;
            display: inline-block;
            font-size: 16px;
            margin: 4px 2px;
            cursor: pointer;
        }
        
        .button2 {
            background-color: #ea430b;
            border: none;
            color: white;
            padding: 15px 150px;
            text-align: center;
            text-decoration: none;
            display: inline-block;
            font-size: 16px;
            margin: 4px 2px;
            cursor: pointer;
        }
    </style>
    <title>
        Smart Lock
    </title>
    <script src="http://192.168.4.3:4000/socket.io/socket.io.js"></script>
    <script>
        var socket = io('http://192.168.4.3:4000');
        socket.on('connect', function() {
            alert('connected');
        });

        socket.on('data', function(msg) {
            document.getElementById('ptag').innerHTML = msg;
        });

        function lock() {
            socket.emit('lock', "lock");
        }

        function unlock() {
            socket.emit('unlock', "unlock");
        }

        function pin() {
            socket.emit('pin', "S" + (Math.floor(Math.random() * 90000000) + 10000000).toString());
        }
    </script>
</head>

<body>
    <h1>Smart Lock App</h1>
    <label>Status: </label>
    <label id="ptag"> --- </label>
    <br>
    <img src="http://192.168.4.3:8080/?action=stream" height="300" width="340" class="rotate180" />
            <br><br>
            <button onclick="lock()" class="button2">Lock</button>
            <br>
            <button onclick="unlock()" class="button1">Unlock</button>
            <br>
            <button onclick="pin()" class="button">Generate temporary pin</button>
            <br>
</body>

</html>

#include <Bridge.h>
///////////////////////////////////
#include "U8glib.h"
U8GLIB_SH1106_128X64 u8g(U8G_I2C_OPT_NO_ACK);
///////////////////////////////////
#include <HCMatrixKeypad.h>
#define DEBOUNCE 10
#define C1 9  /* DIO for keypad column 1 */
#define C2 10  /* DIO for keypad column 2 */
#define C3 11  /* DIO for keypad column 3 */
#define R1 5 /* DIO for keypad row 1 */
#define R2 6 /* DIO for keypad row 2. Delete if there is no row 2! */
#define R3 7 /* DIO for keypad row 3. Delete if there is no row 3! */
#define R4 8  /* DIO for keypad row 4. Delete if there is no row 4! */
HCMatrixKeypad Keypad(DEBOUNCE, C1, C2, C3, ROWMARKER, R1, R2, R3, R4); /* Uncomment for 3x4 keypad */
///////////////////////////////////
String KeyVal = "";
///////////////////////////////////
String C = "";
///////////////////////////////////
String Case = "Lock";
String StatusofLock = "LOCKEDX";
int Begin = 1;
///////////////////////////////////
String Pin = "";
String PinTemp = "*&()(&^";
///////////////////////////////////
String DoorState = "X";
int c1 = 0;
int pc1 = 2;
int c2 = 0;
int pc2 = 2;
int c3 = 0;
int pc3 = 2;
///////////////////////////////////
#define NOTE_B0  31
#define NOTE_C1  33
#define NOTE_CS1 35
#define NOTE_D1  37
#define NOTE_DS1 39
#define NOTE_E1  41
#define NOTE_F1  44
#define NOTE_FS1 46
#define NOTE_G1  49
#define NOTE_GS1 52
#define NOTE_A1  55
#define NOTE_AS1 58
#define NOTE_B1  62
#define NOTE_C2  65
#define NOTE_CS2 69
#define NOTE_D2  73
#define NOTE_DS2 78
#define NOTE_E2  82
#define NOTE_F2  87
#define NOTE_FS2 93
#define NOTE_G2  98
#define NOTE_GS2 104
#define NOTE_A2  110
#define NOTE_AS2 117
#define NOTE_B2  123
#define NOTE_C3  131
#define NOTE_CS3 139
#define NOTE_D3  147
#define NOTE_DS3 156
#define NOTE_E3  165
#define NOTE_F3  175
#define NOTE_FS3 185
#define NOTE_G3  196
#define NOTE_GS3 208
#define NOTE_A3  220
#define NOTE_AS3 233
#define NOTE_B3  247
#define NOTE_C4  262
#define NOTE_CS4 277
#define NOTE_D4  294
#define NOTE_DS4 311
#define NOTE_E4  330
#define NOTE_F4  349
#define NOTE_FS4 370
#define NOTE_G4  392
#define NOTE_GS4 415
#define NOTE_A4  440
#define NOTE_AS4 466
#define NOTE_B4  494
#define NOTE_C5  523
#define NOTE_CS5 554
#define NOTE_D5  587
#define NOTE_DS5 622
#define NOTE_E5  659
#define NOTE_F5  698
#define NOTE_FS5 740
#define NOTE_G5  784
#define NOTE_GS5 831
#define NOTE_A5  880
#define NOTE_AS5 932
#define NOTE_B5  988
#define NOTE_C6  1047
#define NOTE_CS6 1109
#define NOTE_D6  1175
#define NOTE_DS6 1245
#define NOTE_E6  1319
#define NOTE_F6  1397
#define NOTE_FS6 1480
#define NOTE_G6  1568
#define NOTE_GS6 1661
#define NOTE_A6  1760
#define NOTE_AS6 1865
#define NOTE_B6  1976
#define NOTE_C7  2093
#define NOTE_CS7 2217
#define NOTE_D7  2349
#define NOTE_DS7 2489
#define NOTE_E7  2637
#define NOTE_F7  2794
#define NOTE_FS7 2960
#define NOTE_G7  3136
#define NOTE_GS7 3322
#define NOTE_A7  3520
#define NOTE_AS7 3729
#define NOTE_B7  3951
#define NOTE_C8  4186
#define NOTE_CS8 4435
#define NOTE_D8  4699
#define NOTE_DS8 4978

// notes in the melody:
int melody[] = {
  NOTE_C4, NOTE_G3, NOTE_G3, NOTE_A3, NOTE_G3, 0, NOTE_B3, NOTE_C4
};

// note durations: 4 = quarter note, 8 = eighth note, etc.:
int noteDurations[] = {
  4, 8, 8, 4, 4, 4, 4, 4
};
void setup()
{
  Serial1.begin(9600);
  //Bridge.begin();
  u8g.setColorIndex(1);
  u8g.firstPage();
  do {
    u8g.setPrintPos(18, 44);
    u8g.setFont(u8g_font_fub14);
    u8g.print("Booting");
  } while ( u8g.nextPage() );
  //Serial1.println("Starting");
  pinMode(12, INPUT);
  pinMode(13, OUTPUT);
  digitalWrite(13, LOW);
  StatusofLock = "UNLOCKED";
}
void loop()
{
  c1 = !digitalRead(12);
  c2 = digitalRead(A0);
  c3 = digitalRead(A1);
  if (pc1 != c1 && Begin == 1) {
    if (c1 == HIGH) {
      Serial1.println("Open");
      u8g.firstPage();
      do {
        u8g.setPrintPos(18, 44);
        u8g.setFont(u8g_font_fub14);
        u8g.print("Open");
      } while ( u8g.nextPage() );
      StatusofLock = "Unlocked";
    }
    else if (c1 == LOW) {
      Serial1.println("Closed");
      delay(1000);
      u8g.firstPage();
      do {
        u8g.setPrintPos(18, 20);
        u8g.setFont(u8g_font_fub14);
        u8g.print("Enter pin");
        u8g.setPrintPos(18, 40);
        u8g.setFont(u8g_font_fub14);
        u8g.print("to");
        u8g.setPrintPos(18, 60);
        u8g.setFont(u8g_font_fub14);
        u8g.print("unlock");
      } while ( u8g.nextPage() );
      digitalWrite(13, HIGH);
      Serial1.println("Locked");
      StatusofLock = "Locked";
      Case = "Lock";
    }
    delay(500);
    pc1 = c1;
  }
  if (pc2 != c2 && Begin == 1) {
    if (c2 == HIGH) {
      u8g.firstPage();
      do {
        u8g.setPrintPos(18, 44);
        u8g.setFont(u8g_font_fub14);
        u8g.print("Unlocked");
      } while ( u8g.nextPage() );
      digitalWrite(13, LOW);
      Serial1.println("Unlocked");
      StatusofLock = "Unlocked";
    }
    else if (c2 == LOW) {
    }
    delay(500);
    pc2 = c2;
  }
  if (pc3 != c3 && Begin == 1) {
    if (c3 == HIGH) {
      Serial1.println("Bell");
      for (int thisNote = 0; thisNote < 8; thisNote++) {

        // to calculate the note duration, take one second
        // divided by the note type.
        //e.g. quarter note = 1000 / 4, eighth note = 1000/8, etc.
        int noteDuration = 1000 / noteDurations[thisNote];
        tone(4, melody[thisNote], noteDuration);

        // to distinguish the notes, set a minimum time between them.
        // the note's duration + 30% seems to work well:
        int pauseBetweenNotes = noteDuration * 1.30;
        delay(pauseBetweenNotes);
        // stop the tone playing:
        noTone(4);
      }
    }
    else if (c3 == LOW) {
    }
    delay(500);
    pc3 = c3;
  }
  while (Serial1.available() > 0) {
    char c = Serial1.read();
    if (c == '.') {
      String hum = C;
      hum.trim();
      //Serial1.println(hum);
      if (hum == "Begin") {
        delay(1000);
        Serial1.println("Begun");
        Begin = 1;
        delay(1000);
      }
      else if (hum == "Lock") {
        Case = "Lock";
        u8g.firstPage();
        do {
          u8g.setPrintPos(18, 20);
          u8g.setFont(u8g_font_fub14);
          u8g.print("Enter pin");
          u8g.setPrintPos(18, 40);
          u8g.setFont(u8g_font_fub14);
          u8g.print("to");
          u8g.setPrintPos(18, 60);
          u8g.setFont(u8g_font_fub14);
          u8g.print("unlock");
        } while ( u8g.nextPage() );
      }
      else if (hum.substring(0, 1) == "S") {
        Case = "Lock";
        PinTemp = hum.substring(1);
        u8g.firstPage();
        do {
          u8g.setPrintPos(18, 20);
          u8g.setFont(u8g_font_fub14);
          u8g.print("Enter temp");
          u8g.setPrintPos(18, 40);
          u8g.setFont(u8g_font_fub14);
          u8g.print("pin to");
          u8g.setPrintPos(18, 60);
          u8g.setFont(u8g_font_fub14);
          u8g.print("unlock");
        } while ( u8g.nextPage() );
        Serial1.println("Temp Pin set to " + String(PinTemp));
      }
      else if (hum == "LOCKIT") {
        Case = "Lock";
        u8g.firstPage();
        do {
          u8g.setPrintPos(18, 20);
          u8g.setFont(u8g_font_fub14);
          u8g.print("Enter");
          u8g.setPrintPos(18, 40);
          u8g.setFont(u8g_font_fub14);
          u8g.print("pin to");
          u8g.setPrintPos(18, 60);
          u8g.setFont(u8g_font_fub14);
          u8g.print("unlock");
        } while ( u8g.nextPage() );
        digitalWrite(13, HIGH);
        Serial1.println("Locked");
        StatusofLock = "Locked";
      }
      else if (hum == "UNLOCKIT") {
        u8g.firstPage();
        do {
          u8g.setPrintPos(18, 44);
          u8g.setFont(u8g_font_fub14);
          u8g.print("Unlocked");
        } while ( u8g.nextPage() );
        digitalWrite(13, LOW);
        Serial1.println("Unlocked");
        StatusofLock = "Unlocked";
        Case = "";
      }
      C = "";
    }
    else if (c != '\n' && c != '\r') {
      C += c;
    }
  }
  Keypad.Scan();
  if (Keypad.New_Key() && Begin == 1)
  {
    if (((Keypad.Read() / 10) == 1) && ((Keypad.Read() % 10) == 1)) {
      KeyVal = "1";
    }
    else if (((Keypad.Read() / 10) == 2) && ((Keypad.Read() % 10) == 1)) {
      KeyVal = "4";
    }
    else if (((Keypad.Read() / 10) == 3) && ((Keypad.Read() % 10) == 1)) {
      KeyVal = "7";
    }
    else if (((Keypad.Read() / 10) == 4) && ((Keypad.Read() % 10) == 1)) {
      KeyVal = "Backward";
    }
    else if (((Keypad.Read() / 10) == 1) && ((Keypad.Read() % 10) == 2)) {
      KeyVal = "2";
    }
    else if (((Keypad.Read() / 10) == 2) && ((Keypad.Read() % 10) == 2)) {
      KeyVal = "5";
    }
    else if (((Keypad.Read() / 10) == 3) && ((Keypad.Read() % 10) == 2)) {
      KeyVal = "8";
    }
    else if (((Keypad.Read() / 10) == 4) && ((Keypad.Read() % 10) == 2)) {
      KeyVal = "0";
    }
    else if (((Keypad.Read() / 10) == 1) && ((Keypad.Read() % 10) == 3)) {
      KeyVal = "3";
    }
    else if (((Keypad.Read() / 10) == 2) && ((Keypad.Read() % 10) == 3)) {
      KeyVal = "6";
    }
    else if (((Keypad.Read() / 10) == 3) && ((Keypad.Read() % 10) == 3)) {
      KeyVal = "9";
    }
    else if (((Keypad.Read() / 10) == 4) && ((Keypad.Read() % 10) == 3)) {
      KeyVal = "Ent";
    }
    //Serial1.println(KeyVal);
    if (Case == "Lock" && KeyVal != "Ent" && KeyVal != "Backward" && Pin.length() < 8) {
      Pin += KeyVal;
      u8g.firstPage();
      do {
        u8g.setPrintPos(18, 44);
        u8g.setFont(u8g_font_fub14);
        u8g.print(Pin);
      } while ( u8g.nextPage() );
      //Serial1.println(Pin);
    }
    else if (Case == "Lock" && KeyVal == "Ent" && Pin.length() < 9) {
      if (Pin == "12345678" || Pin == PinTemp) {
        u8g.firstPage();
        do {
          u8g.setPrintPos(18, 44);
          u8g.setFont(u8g_font_fub14);
          u8g.print("Unlocked");
        } while ( u8g.nextPage() );
        digitalWrite(13, LOW);
        Serial1.println("Unlocked");
        StatusofLock = "Unlocked";
        Case = "";
      }
      else if (Pin != "12345678" && Pin != PinTemp) {
        u8g.firstPage();
        do {
          u8g.setPrintPos(18, 44);
          u8g.setFont(u8g_font_fub14);
          u8g.print("Wrong Pin");
        } while ( u8g.nextPage() );
        Case = "Lock";
        Serial1.println("Wrong Pin");
        delay(3000);
        u8g.firstPage();
        do {
          u8g.setPrintPos(18, 20);
          u8g.setFont(u8g_font_fub14);
          u8g.print("Enter pin");
          u8g.setPrintPos(18, 40);
          u8g.setFont(u8g_font_fub14);
          u8g.print("to");
          u8g.setPrintPos(18, 60);
          u8g.setFont(u8g_font_fub14);
          u8g.print("unlock");
        } while ( u8g.nextPage() );
      }
      //Serial1.println(Pin);
      Pin = "";
    }
    else if (Case == "Lock" && KeyVal == "Backward" && Pin.length() < 9) {
      int I = Pin.length();
      Pin.remove(I - 1);
      u8g.firstPage();
      do {
        u8g.setPrintPos(18, 44);
        u8g.setFont(u8g_font_fub14);
        u8g.print(Pin);
      } while ( u8g.nextPage() );
      //Serial1.println(Pin);
    }
  }
}

Credits

Jayakarthigeyan Prabakar

3 projects • 16 followers

Thanks to Bhanu Kishore, Chaitanya, and Hariharan Prabhakar.

Comments

Awards

Asia Pacific Winner

The Future of Smart Home and Office is Here!

Smart Lock - Internet connected door lock with door bell

Things used in this project

Hardware components

Software apps and online services

Hand tools and fabrication machines

Story

Custom parts and enclosures

Outdoor body part 1

Outdoor body part 2

Outdoor body part 3

Outdoor body part 4

Outdoor body part 5

Indoor body part 1

Indoor body part 2

Indoor body part 3

Indoor body part 4

Schematics

Schematic

Code

app.js

index.html

ArduinoMain.ino

Credits

Jayakarthigeyan Prabakar

Comments

Awards

Embed the widget on your own site

Smart Lock - Internet connected door lock with door bell

Smart Lock - Internet connected door lock with door bell

Things used in this project

Hardware components

Software apps and online services

Hand tools and fabrication machines

Story

Custom parts and enclosures

Outdoor body part 1

Outdoor body part 2

Outdoor body part 3

Outdoor body part 4

Outdoor body part 5

Indoor body part 1

Indoor body part 2

Indoor body part 3

Indoor body part 4

Schematics

Schematic

Code

app.js

index.html

ArduinoMain.ino

Credits

Jayakarthigeyan Prabakar

Comments

Awards

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