miguelbalboa/rfid

Health v2 · maintenance only

Adoption not part of the score

3033 stars · 1493 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

An Arduino library for driving MFRC522-based RFID reader modules over SPI, supporting reading and writing MIFARE Classic and related cards. Development is frozen; the maintainer recommends the successor Arduino_MFRC522v2 library for new work.

Use cases

• read RFID card UIDs with an Arduino
• write data to MIFARE Classic 1K/4K card sectors
• build an RFID door lock or access control project
• change the UID on Chinese UID-changeable MIFARE cards
• interface an RC522 module over SPI with Arduino
• run the MFRC522 firmware self-check to detect fake boards

When to choose

• you have an MFRC522/RC522 module and an Arduino and need mature, widely-documented example code
• your project depends on the classic API that many existing tutorials and projects use
• you need MIFARE Classic Crypto1 communication or UID writing

When to avoid

• starting a new project - use the successor Arduino_MFRC522v2 library instead
• you need MIFARE DESFire, 3DES, or AES support, which is not implemented
• you need support for boards other than Arduino or new features - development is frozen

Facets

library · maturity maintenance

embedded sdk embedded-systems hardware iot embedded cpp c arduino rfid mfrc522 spi mifare nfc

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markdown · JSON · MCP: product_card(name="miguelbalboa/rfid")