Rc522 Proteus Library Updated -

One killer feature of the updated library is dynamic tag control. You don't have to stop the simulation to change the UID. Use the Proteus Virtual Terminal:

This allows you to test access control logic, logging, and error handling without hardware.

Even with the update, you might encounter problems. Here’s the troubleshooting guide:

Use the standard MFRC522 library in your real Arduino IDE, but when compiling for Proteus, place the compiled .HEX file in the Arduino’s properties in Proteus.

#include <SPI.h>
#include <MFRC522.h>
#define RST_PIN 9
#define SS_PIN 10
MFRC522 mfrc522(SS_PIN, RST_PIN);
void setup() 
Serial.begin(9600);
SPI.begin();
mfrc522.PCD_Init();
Serial.println("Place your tag...");

void loop() 
if (mfrc522.PICC_IsNewCardPresent() && mfrc522.PICC_ReadCardSerial()) 
Serial.print("UID: ");
for (byte i = 0; i < mfrc522.uid.size; i++) 
Serial.print(mfrc522.uid.uidByte[i], HEX);
Serial.print(" ");
Serial.println();
mfrc522.PICC_HaltA();

After compiling in Arduino IDE, go to Sketch > Export Compiled Binary. In Proteus, double-click the Arduino UNO, browse to the .HEX file in the Program File field. Run the simulation. As soon as you click "Play," the virtual RC522 will read the pre-configured UID and display it in the virtual serial terminal.

The updated RC522 library opens doors for sophisticated simulation:

Download the MFRC522 library from GitHub (by miguelbalboa). Use this updated code:

#include <SPI.h>
#include <MFRC522.h>
#include <LiquidCrystal.h>
#define RST_PIN  9
#define SS_PIN   10
MFRC522 mfrc522(SS_PIN, RST_PIN);
LiquidCrystal lcd(7, 6, 5, 4, 3, 2);
void setup() 
Serial.begin(9600);
lcd.begin(16, 2);
lcd.print("Place RFID Tag");
SPI.begin();
mfrc522.PCD_Init();
// New feature: Check for updated simulated version
byte version = mfrc522.PCD_ReadRegister(mfrc522.VersionReg);
Serial.print("Chip Version: 0x");
Serial.println(version, HEX);
// Expected in simulation: 0x92 or 0x91 (not 0x12 from old buggy lib)

void loop() 
if (!mfrc522.PICC_IsNewCardPresent()) return;
if (!mfrc522.PICC_ReadCardSerial()) return;
lcd.clear();
lcd.print("UID:");
for (byte i = 0; i < mfrc522.uid.size; i++) 
lcd.print(mfrc522.uid.uidByte[i], HEX);
lcd.print(" ");

mfrc522.PICC_HaltA();
delay(2000);