void loop() // Look for new cards if (!mfrc522.PICC_IsNewCardPresent()) return;
The timing is wrong. The anti-collision is fake. You will waste 3 hours debugging why your simulation fails, only to realize the library doesn't support PICC_ReadCardSerial() correctly. rc522 proteus library
Search for "RC522 Proteus Library" or "MFRC522 Proteus model" . Look for a package containing three key files: The Complete Guide to the RC522 Proteus Library:
: Move the downloaded .LIB and .IDX files into the LIBRARY folder. If there is a .HEX or .MD5 file, place it in the MODELS folder. The anti-collision is fake
The RC522 is a widely used, low-cost RFID reader module based on the NXP MFRC522 chip that supports 13.56 MHz ISO/IEC 14443A cards (MIFARE Classic, NTAG, etc.). Proteus is a popular electronics simulation suite (schematics + SPICE + MCU debugging). Combining RC522 hardware knowledge with Proteus simulation lets you prototype RFID-enabled projects, validate MCU interfacing logic, and test firmware flows without immediate access to physical hardware.