RFID Based Door Lock System using Ardiuno

 In this project I made the RFID based door lock system. I used Arduino 2560 and EM-18 RFID reader.

When RFID card is matched with password then door get open. For door open and closed I used DC motor.

Components Used:  

1. Arduino Uno
2. EM18 RFID Reader
3. RFID Card
4. DC Motor
5. 16x2 LCD
6. Jumper wires
7.  10K Pot

Block Diagram:

Code:

#include <LiquidCrystal.h>

LiquidCrystal lcd(47, 46, 45, 40, 39, 38, 37);

String v;

String tag =  "3B003B3B86BD";

int M1_1 = 33;

int M1_2 = 34;

void setup()

{

  lcd.begin(16,2);

  Serial3.begin(9600);

  Serial.begin(9600);

  pinMode(M1_1, OUTPUT);

  pinMode(M1_2, OUTPUT);

}

void loop() {

  // put your main code here, to run repeatedly:

  if (v == "")

  {

      lcd.setCursor(0, 0);

      lcd.write("Scan Your Card");

      delay(1000);

      lcd.clear();

  }

if (Serial3.available()>0)

{

  v = Serial3.readString();

if (v == tag)

{

  lcd.setCursor(0, 0);

  lcd.write("Welcome to Home");

  delay(1000);

  lcd.clear();

  digitalWrite(M1_1,HIGH);

  digitalWrite(M1_2,LOW);

}

else

{

  lcd.setCursor(0, 0);

  lcd.write("Not matching");

  delay(1000);

  lcd.clear();

}

}

}