RFID Door Security Arduino

Hello Friends, I'm back with another simple but interesting project which can be built in very simple way. Today we're going to make Arduino RFID Door Security system with minimal required components. The working here is briefly for more information regarding this go to link provided. In this tutorial, we're making a security system which uses RF Communication and Wireless communication between Cards/Tags and RFID module. As it is not very high quality project, the components used in this one must not be used for professional work.

RFID rc522 is a radio frequency-based module in which having the sensing range is near about 5 cm. As the quality of the tags are not very good, so the range is a bit of compromise. The reader provide power to the rag using via wireless coil embedded inside both tag and module. It provides the power to the tag also by the mutual induction method. It means when the tag reaches in the range of the coil of reader, then voltage induced in the tag for a moment. At this moment, the tag also transfers the information inside the chip via Radiofrequency. When we take the tag near to the reader the voltage and current induce in the tag and that instant the tag transfer the information via Radiofrequency that’s why we called it RFID that stand for radio frequency identification method.

• Arduino UNO
• RC522 RFID Module
• Servo motor
• Jumper wires
• Breadboard
• Cardboard
• Some usual material

The pinout is given adjacent to the diagram

#include "SPI.h"
#include "MFRC522.h"
#include 
#define SS_PIN 10
#define RST_PIN 9
#include 
int m=0,n=0;
Servo myservo; 
int pos = 0;
MFRC522 rfid(SS_PIN, RST_PIN);

MFRC522::MIFARE_Key key;
const int rs = 0, en = 6, d4 = 5, d5 = 4, d6 = 2, d7 = 1;
LiquidCrystal lcd(rs, en, d4, d5, d6, d7);
void setup() {
  Serial.begin(9600);
  SPI.begin();
  rfid.PCD_Init();
  pinMode(A0, OUTPUT);
  pinMode(A1, OUTPUT);
  pinMode(A2, INPUT_PULLUP);
  pinMode(A3, INPUT_PULLUP);
   
  lcd.begin(16, 2);
  myservo.attach(3);
}

void loop() {


m= analogRead(A3);
n= analogRead(A2);
int val_1= map(m, 250 , 850 , 0 , 100);
int val_2= map(n, 250, 850, 0, 100);
  
  if (!rfid.PICC_IsNewCardPresent() || !rfid.PICC_ReadCardSerial())
    return;

  // Serial.print(F("PICC type: "));
  MFRC522::PICC_Type piccType = rfid.PICC_GetType(rfid.uid.sak);
  // Serial.println(rfid.PICC_GetTypeName(piccType));

  // Check is the PICC of Classic MIFARE type
  if (piccType != MFRC522::PICC_TYPE_MIFARE_MINI &&
    piccType != MFRC522::PICC_TYPE_MIFARE_1K &&
    piccType != MFRC522::PICC_TYPE_MIFARE_4K) {
    Serial.println(F("Your tag is not of type MIFARE Classic."));
    return;
  }

  String strID = "";
  for (byte i = 0; i < 4; i++) {
    strID +=
    (rfid.uid.uidByte[i] < 0x10 ? "0" : "") + String(rfid.uid.uidByte[i], HEX) + (i!=3 ? ":" : ""); } strID.toUpperCase(); Serial.print("Tap card key: "); Serial.println(strID); if(strID.indexOf("1A:28:54:73")>=0)

{
  Serial.println("card accepted");
  digitalWrite(A0, HIGH);
  lcd.setCursor(0, 1);
  lcd.print("Speed Limit= ");
  lcd.print(val_2);
  delay(1000);
  lcd.clear();
  digitalWrite(A0, LOW);
 
     myservo.write(0);  
    myservo.write(90);              // tell servo to go to position in variable 'pos'
    delay(15);         
    delay(2000);// waits 15ms for the servo to reach the position

    myservo.write(0);              // tell servo to go to position in variable 'pos'
    delay(15);                       // waits 15ms for the servo to reach the position
  
  
  }
else

{
  digitalWrite(A0, LOW);
  }

if(strID.indexOf("1A:28:54:73")>=0)

{
  Serial.println("Token Accepted");
  digitalWrite(A1, HIGH);
  lcd.setCursor(0, 1);
  lcd.print("Speed Limit= ");
  lcd.print(val_1);
  delay(1000);
  lcd.clear();
  digitalWrite(A1, LOW);
  
  
  }
else

{
  digitalWrite(A1, LOW);
  }
  





  rfid.PICC_HaltA();
  rfid.PCD_StopCrypto1();
}

For more information about code working and explanation of other components, visit here.