Muhammad Aqib
Published

RFID and Keypad Door lock and Alert System Using Arduino

Upon scanning the right tag and entering right pass, it will open door and send confirmation message otherwise it will send alert message.

IntermediateProtip2 hours20,181

Things used in this project

Hardware components

Arduino UNO & Genuino UNO
Arduino UNO & Genuino UNO
×1
I2C LCD
×1
MFRC522 RFID Reader
×1
Tags
×1
SIM900 GSM module
×1
5V, 2A power adapter
×1
SG90 Micro-servo motor
SG90 Micro-servo motor
×1
4X4 Keypad
×1
Resistor 221 ohm
Resistor 221 ohm
×3
Buzzer
Buzzer
×1
6 to 12V Power source
×1
5 mm LED: Red
5 mm LED: Red
×3
5 mm LED: Green
5 mm LED: Green
×1
LED Blue
×1

Software apps and online services

Arduino IDE
Arduino IDE

Story

Read more

Schematics

rfid_and_keypad_based_door_lock_and_alert_system_1a0WvQzL1F.png

Code

Code snippet #1

Plain text
// Include required libraries
#include <MFRC522.h>
#include <LiquidCrystal_I2C.h>
#include <Keypad.h>
#include <SoftwareSerial.h>
#include <Servo.h>
#include <SPI.h>

// Create instances
SoftwareSerial SIM900(3, 4); // SoftwareSerial SIM900(Rx, Tx)
MFRC522 mfrc522(10, 9); // MFRC522 mfrc522(SS_PIN, RST_PIN)
LiquidCrystal_I2C lcd(0x27, 16, 2);
Servo sg90;

// Initialize Pins for led's, servo and buzzer
// Blue LED is connected to 5V
constexpr uint8_t greenLed = 7;
constexpr uint8_t redLed = 6;
constexpr uint8_t servoPin = 8;
constexpr uint8_t buzzerPin = 5;

char initial_password[4] = {'1', '2', '3', '4'};  // Variable to store initial password
String tagUID = "29 B9 ED 23";  // String to store UID of tag. Change it with your tag's UID
char password[4];   // Variable to store users password
boolean RFIDMode = true; // boolean to change modes
boolean NormalMode = true; // boolean to change modes
char key_pressed = 0; // Variable to store incoming keys
uint8_t i = 0;  // Variable used for counter

// defining how many rows and columns our keypad have
const byte rows = 4;
const byte columns = 4;

// Keypad pin map
char hexaKeys[rows][columns] = {
  {'1', '2', '3', 'A'},
  {'4', '5', '6', 'B'},
  {'7', '8', '9', 'C'},
  {'*', '0', '#', 'D'}
};

// Initializing pins for keypad
byte row_pins[rows] = {A0, A1, A2, A3};
byte column_pins[columns] = {2, 1, 0};

// Create instance for keypad
Keypad keypad_key = Keypad( makeKeymap(hexaKeys), row_pins, column_pins, rows, columns);

void setup() {
  // Arduino Pin configuration
  pinMode(buzzerPin, OUTPUT);
  pinMode(redLed, OUTPUT);
  pinMode(greenLed, OUTPUT);

  sg90.attach(servoPin);  //Declare pin 8 for servo
  sg90.write(0); // Set initial position at 0 degrees

  lcd.begin();   // LCD screen
  lcd.backlight();
  SPI.begin();      // Init SPI bus
  mfrc522.PCD_Init();   // Init MFRC522

  // Arduino communicates with SIM900 GSM shield at a baud rate of 19200
  // Make sure that corresponds to the baud rate of your module
  SIM900.begin(19200);

  // AT command to set SIM900 to SMS mode
  SIM900.print("AT+CMGF=1\r");
  delay(100);
  // Set module to send SMS data to serial out upon receipt
  SIM900.print("AT+CNMI=2,2,0,0,0\r");
  delay(100);

  lcd.clear(); // Clear LCD screen
}

void loop() {
  if (NormalMode == false) {
    // Function to receive message
    receive_message();
  }

  else if (NormalMode == true) {
    // System will first look for mode
    if (RFIDMode == true) {
      // Function to receive message
      receive_message();

      lcd.setCursor(0, 0);
      lcd.print("   Door Lock");
      lcd.setCursor(0, 1);
      lcd.print(" Scan Your Tag ");

      // Look for new cards
      if ( ! mfrc522.PICC_IsNewCardPresent()) {
        return;
      }

      // Select one of the cards
      if ( ! mfrc522.PICC_ReadCardSerial()) {
        return;
      }

      //Reading from the card
      String tag = "";
      for (byte j = 0; j < mfrc522.uid.size; j++)
      {
        tag.concat(String(mfrc522.uid.uidByte[j] < 0x10 ? " 0" : " "));
        tag.concat(String(mfrc522.uid.uidByte[j], HEX));
      }
      tag.toUpperCase();

      //Checking the card
      if (tag.substring(1) == tagUID)
      {
        // If UID of tag is matched.
        lcd.clear();
        lcd.print("Tag Matched");
        digitalWrite(greenLed, HIGH);
        delay(3000);
        digitalWrite(greenLed, LOW);

        lcd.clear();
        lcd.print("Enter Password:");
        lcd.setCursor(0, 1);
        RFIDMode = false; // Make RFID mode false
      }

      else
      {
        // If UID of tag is not matched.
        lcd.clear();
        lcd.setCursor(0, 0);
        lcd.print("Wrong Tag Shown");
        lcd.setCursor(0, 1);
        lcd.print("Access Denied");
        digitalWrite(buzzerPin, HIGH);
        digitalWrite(redLed, HIGH);
        send_message("Someone Tried with the wrong tag \nType 'close' to halt the system.");
        delay(3000);
        digitalWrite(buzzerPin, LOW);
        digitalWrite(redLed, LOW);
        lcd.clear();
      }
    }

    // If RFID mode is false, it will look for keys from keypad
    if (RFIDMode == false) {
      key_pressed = keypad_key.getKey(); // Storing keys
      if (key_pressed)
      {
        password[i++] = key_pressed; // Storing in password variable
        lcd.print("*");
      }
      if (i == 4) // If 4 keys are completed
      {
        delay(200);
        if (!(strncmp(password, initial_password, 4))) // If password is matched
        {
          lcd.clear();
          lcd.print("Pass Accepted");
          sg90.write(90); // Door Opened
          digitalWrite(greenLed, HIGH);
          send_message("Door Opened \nIf it was't you, type 'close' to halt the system.");
          delay(3000);
          digitalWrite(greenLed, LOW);
          sg90.write(0); // Door Closed
          lcd.clear();
          i = 0;
          RFIDMode = true; // Make RFID mode true
        }
        else    // If password is not matched
        {
          lcd.clear();
          lcd.print("Wrong Password");
          digitalWrite(buzzerPin, HIGH);
          digitalWrite(redLed, HIGH);
          send_message("Someone Tried with the wrong Password \nType 'close' to halt the system.");
          delay(3000);
          digitalWrite(buzzerPin, LOW);
          digitalWrite(redLed, LOW);
          lcd.clear();
          i = 0;
          RFIDMode = true;  // Make RFID mode true
        }
      }
    }
  }
}

// Receiving the message
void receive_message()
{
  char incoming_char = 0; //Variable to save incoming SMS characters
  String incomingData;   // for storing incoming serial data
  
  if (SIM900.available() > 0)
  {
    incomingData = SIM900.readString(); // Get the incoming data.
    delay(10);
  }

  // if received command is to open the door
  if (incomingData.indexOf("open") >= 0)
  {
    sg90.write(90);
    NormalMode = true;
    send_message("Opened");
    delay(10000);
    sg90.write(0);
  }

  // if received command is to halt the system
  if (incomingData.indexOf("close") >= 0)
  {
    NormalMode = false;
    send_message("Closed");
  }
  incomingData = "";
}

// Function to send the message
void send_message(String message)
{
  SIM900.println("AT+CMGF=1");    //Set the GSM Module in Text Mode
  delay(100);
  SIM900.println("AT+CMGS=\"+XXXXXXXXXXXX\""); // Replace it with your mobile number
  delay(100);
  SIM900.println(message);   // The SMS text you want to send
  delay(100);
  SIM900.println((char)26);  // ASCII code of CTRL+Z
  delay(100);
  SIM900.println();
  delay(1000);
}

Credits

Muhammad Aqib

Muhammad Aqib

16 projects • 82 followers
Hire me at www.freelancer.pk/u/Muhammadaqibdutt. Use my referral link (www.freelancer.pk/get/Muhammadaqibdutt?f=give) and get $20.

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