PN532 NFC RFID Reader Writer Module V3

Where a basic RFID reader only reads a tag's fixed ID, the PN532 chip behind this module does considerably more: it reads and writes MIFARE and NTAG tags, and supports genuine peer-to-peer NFC communication directly with an Android phone, not just passive tag scanning. That range of capability is why the PN532 shows up in serious NFC projects rather than the cheaper single-purpose RFID readers.

Three selectable interfaces - I2C, SPI and UART - mean it fits whatever bus a project's microcontroller already has free, rather than forcing one specific wiring pattern. Data rates up to 424kbps keep tag reads and NFC exchanges fast enough for real interactive use rather than a noticeable pause.

Common uses are NFC payment or access-control prototyping, tag-based automation triggers, and any project wanting to both read and write tags rather than only identify pre-programmed ones.