How to Make ATM machine at home

Circuit:

Download Programming:

#include <Servo.h>

#include <MFRC522.h>

#include <LiquidCrystal_I2C.h>

#include <Keypad.h>

#include <SPI.h>

// Create instances

LiquidCrystal_I2C lcd(0x27,16,2);

MFRC522 mfrc522(10, 9); // MFRC522 mfrc522(SS_PIN, RST_PIN)

Servo myservo1;

char initial_password[4] = {'0', '8', '0', '6'}; // Variable to store initial password

String tagUID = "43 19 8A 1A"; // 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

char key_pressed = 0; // Variable to store incoming keys

uint8_t i = 0; // Variable used for counter

const int buzzer= 5;

const int motor= 7;

// defining how many rows and columns our keypad have

const byte rows = 4;

const byte columns = 4;

int val = 0;

int myval = 0;

// 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() {

  lcd.init(); // initialize the lcd

  lcd.init();

  // Print a message to the LCD.

  lcd.backlight();

  SPI.begin(); // Init SPI bus

  mfrc522.PCD_Init(); // Init MFRC522

  pinMode(buzzer, OUTPUT);

  pinMode(motor, OUTPUT);

  myservo1.attach(3);

  lcd.clear();

  lcd.setCursor(0, 0);

  lcd.print("-----ATM------");

  lcd.setCursor(0, 1);

  lcd.print("BeyonD Payment's");

  delay(5000);

}

void loop() {

  // System will first look for mode

  if (RFIDMode == true) {

;

    lcd.clear();

    lcd.setCursor(0, 0);

    lcd.print("Tap Your Card!");

    // 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();

      tone(buzzer,2000);

      delay(200);

      noTone(buzzer);

      lcd.print("Card Detected :)");

      delay(1000);

      lcd.clear();

      lcd.print("Enter Pin:");

      lcd.setCursor(0, 1);

      RFIDMode = false; // Make RFID mode false

    }

    else

    {

      // If UID of tag is not matched.

      tone(buzzer,2000);

      delay(200);

      noTone(buzzer);

      lcd.clear();

      lcd.setCursor(0, 0);

      lcd.print("Processing");

      delay(250);

      lcd.setCursor(10, 0);

      lcd.print(".");

      delay(250);

      lcd.setCursor(11, 0);

      lcd.print(".");

      delay(250);

      lcd.setCursor(12, 0);

      lcd.print(".");

      delay(250);

      lcd.clear();

      lcd.setCursor(0, 0);

      lcd.print("Processing");

      delay(250);

      lcd.setCursor(10, 0);

      lcd.print(".");

      delay(250);

      lcd.setCursor(11, 0);

      lcd.print(".");

      delay(250);

      lcd.setCursor(12, 0);

      lcd.print(".");

      lcd.clear();

      lcd.setCursor(0, 0);

      lcd.print("Card Invalid!");

      tone(buzzer,5000);

      delay(400);

      noTone(buzzer);

      delay(800);

      lcd.clear();

      lcd.setCursor(0, 0);

      lcd.print("Please Scan a");

      lcd.setCursor(0, 1);

      lcd.print("Vaild Card.");

      delay(2000);

      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("Pin Accepted.");

        tone(buzzer,2000);

        delay(200);

        noTone(buzzer);

        delay(500);

        lcd.clear();

        lcd.setCursor(0, 0);

        lcd.print("Processing");

        delay(250);

        lcd.setCursor(10, 0);

        lcd.print(".");

        delay(250);

        lcd.setCursor(11, 0);

        lcd.print(".");

        delay(250);

        lcd.setCursor(12, 0);

        lcd.print(".");

        delay(250);

        lcd.clear();

        lcd.setCursor(0, 0);

        lcd.print("Processing");

        delay(500);

        lcd.setCursor(10, 0);

        lcd.print(".");

        delay(250);

        lcd.setCursor(11, 0);

        lcd.print(".");

        delay(250);

        lcd.setCursor(12, 0);

        lcd.print(".");

        lcd.clear();

        lcd.setCursor(0, 0);

        lcd.print("Take Your Cash");

        digitalWrite(motor, HIGH);

        delay(10000);

        delay(500);

        lcd.clear();

        lcd.setCursor(0, 0);

        lcd.print("Transaction");

        lcd.setCursor(0, 1);

        lcd.print("Completed.");

        digitalWrite(motor, LOW);

        while (myval<=90);

        myservo1.write(myval);

        myval = (myval + 1);

        tone(buzzer,2000);

        delay(700);

        noTone(buzzer);

        delay(2000);

        lcd.clear();

        i = 0;

        RFIDMode = true; // Make RFID mode true

      }

      else // If password is not matched

      {

        lcd.clear();

        lcd.setCursor(0, 0);

        lcd.print("Wrong Pin");

        lcd.setCursor(0, 1);

        lcd.print("Entered :(");

        tone(buzzer,5000);

        delay(500);

        noTone(buzzer);

        delay(3000);

        lcd.clear();

        i = 0;

        RFIDMode = true; // Make RFID mode true

      }

    }

  }

}

Demo Video: