General info

This ESP32 (esp-idf) library provides an integration with RC522 module. It's forked from here. Some inspiration was taken from Arduino rfid library.

What works?

• get UID (4, 7, or 10 bytes) from the tag
• determine type of tag - only for some MIFARE and NTAG tags
• dump MIFARE classic (1K / 4K) content alongside with access bits
• dump NTAG213/NTAG215/NTAG216 content
• writing to Mifare Classic tag

What does not work / not implemented?

• detect card using IRQ ping (instead of active polling) - all my attempts to make it work failed
• operations with Value blocks (decrement / increment / restore / transfer / ...)
• no proper collision handling (it treated as any other error)

Other notes

• for NTAG / Mifare it uses "default" password only - but it's easy to change it

References

• MFRC522 datasheet
• Mifare Classic 1K datasheet
• Mifare Classic 4K datasheet
• Mifare Ultralight datasheet
• Mifare type identification procedure
• NTAG213/215/216 datasheet

ESP32 connection

ESP32	RC522	Comment
IO22	SDA
IO19	SCK
IO23	MOSI
IO25	MISO
IO33	IRQ	(not used / does not work)
GND	GND
3v3	3v3

Author

Denis Elkin linkedin

Forked from abobija

License

MIT