Published March 18, 2023

ESP32 with RFID RC522 Module

RFID module with ESP32 micrcontroller

BeginnerFull instructions provided4 hours4,985

Things used in this project

Hardware components

Arduino UNO

Espressif ESP32S

M5Stack Mini RFID Unit RC522 Module Sensor

Software apps and online services

Arduino IDE

Story

In this tutorial, we will be write the combination of two popular technologies in the world of embedded systems: the ESP32 microcontroller and the RC522 RFID reader to make this tutorial.

The ESP32 is a strong microcontroller that can be customized utilizing the Arduino IDE, and the RC522 RFID peruser is a minimal-expense answer for adding RFID capacities to your ventures. By consolidating these two ESP32 with RFID advancements

Components Required for RFID ESP32

we need the given hardware to learn this activity

ESP32 development board (we recommend the ESP32 DevKitC)
RC522 RFID reader module
Breadboard and jumper wires
RFID tags
RGB LED
ESP32 Compatible cable

We can also make the PCB of the given components as per the circuit diagram with the help of PCBWAY.

Software Requirements

To program the ESP32 and the RC522 RFID reader, we will be using the Arduino IDE. Make sure that you have the following software installed:

1. Arduino ide

2. Mfrc library esp32 version

3. ESP board package for Arduino ide

Since we have the ESP32 and the RC522 RFID peruser associated and the MFRC522 library introduced, we can begin composing the code. The accompanying code is an illustration of how to peruse an RFID tag and print the UID (Special Identifier) to the chronic screen:

Also, we have given all the required code and circuit diagram here. still if you have any doubt you can see the same article esp32s with RFID.

Code

code

#include "SPI.h"
#include "MFRC522.h"
#define SS_PIN 5
#define RST_PIN 0
int m=0,n=0;
#include <ESP32Servo.h>
MFRC522 rfid(SS_PIN, RST_PIN);
MFRC522::MIFARE_Key key;
#define ACCESS_DELAY 2000
#define DENIED_DELAY 1000
#include <LiquidCrystal_I2C.h>
// set the LCD number of columns and rows
int lcdColumns = 16;
int lcdRows = 2;
Servo myservo;  // create servo object to control a servo
int pos = 0;  
LiquidCrystal_I2C lcd(0x27, lcdColumns, lcdRows);  
// initialize the library by associating any needed LCD interface pin
// with the arduino pin number it is connected to
void setup() 
{
  Serial.begin(9600);   // Initiate a serial communication
  SPI.begin();          // Initiate  SPI bus
  //mfrc522.PCD_Init();   // Initiate MFRC522
   rfid.PCD_Init();
   lcd.init();  
   myservo.attach(32);
  
  
  Serial.println("Put your card to the reader...");
  lcd.backlight();
  
  



  
  lcd.setCursor(0, 1);
  lcd.print("Put your card");
  Serial.println();
  //digitalWrite(RELAY, HIGH);
 myservo.write(90); 
 delay(500);
pinMode(33, INPUT_PULLUP);
 
 pinMode(25, OUTPUT);
  pinMode(26, OUTPUT);
 //pinMode(A0, INPUT_PULLUP);
  pinMode(27, OUTPUT);
 pinMode(14, OUTPUT);
 //pinMode(14, OUTPUT);
 // analogWrite(3, 5);
  digitalWrite(26, LOW);
    digitalWrite(25, HIGH);
    
}
void loop() 
{
  lcd.backlight();
 lcd.clear();
  Serial.println("Put your card to the reader...");
  lcd.setCursor(0, 1);
  lcd.print("Put your card");
  Serial.println();
  // Look for new cards
  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: ");
  
  //delay(1000);
  Serial.println(strID);
if(strID.indexOf("11:65:FB:0B")>=0)
{
  Serial.println("Authorized access");
    lcd.clear();
    lcd.setCursor(0, 1);
  lcd.print("Authorized access");
    Serial.println();
   // 
   
    myservo.write(180);              // tell servo to go to position in variable 'pos'
             
 
   
    delay(500);
    delay(ACCESS_DELAY);
   myservo.write(90);  
  //delay(500);
 
while(1)
{
    int m= analogRead(33);
    Serial.println(m);
   // delay(300);
    
    if(m<200)
    {
      
while(1)
{
     digitalWrite(26, HIGH);
      digitalWrite(14, HIGH);
    digitalWrite(25, LOW);
    digitalWrite(27, HIGH );
   lcd.clear();
    lcd.setCursor(0, 1);
  lcd.print("Room Occupied");
  lcd.setCursor(0, 0);
  lcd.print("A Team 3 Members");
   analogWrite(3, 225);
delay(200);
    }
    }
    else if (m>500)
    {
 //      analogWrite(3, 10);
  digitalWrite(26, LOW);
    digitalWrite(25, HIGH);
   // digitalWrite(36, LOW );
      delay(100);
      digitalWrite(14, LOW);
      
      }
  
  
  }
}
  
  
 else   {
    Serial.println(" Access denied");
    lcd.clear();
    lcd.setCursor(0, 1);
  lcd.print("Access denied");
 delay(DENIED_DELAY);
    // analogWrite(3, 10);
  digitalWrite(26, LOW);
    digitalWrite(25, HIGH);
   //  delay(DENIED_DELAY);
   digitalWrite(14, LOW);
  }
}