Title: NFC
Description: Information about GhostESP's NFC capabilities
URL: /latest/nfc/
Version: latest
Section: GhostESP: Revival
Keywords: NFC, RFID, PN532, ST25R3916, ISO14443A, tag reading, tag writing, emulation
Search index: /search-index.json

# NFC

> Information about GhostESP's NFC capabilities

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GhostESP supports two NFC frontends, selectable at runtime:
- PN532 - the default reader. Fast hardware MIFARE Classic authentication, great for dictionary brute-force.
- ST25R3916/ST25R3916B - software-driven reader/emulator over SPI or I2C. Adds card emulation (Type 2 / NTAG) and software Crypto1 for nested/hardnested nonce capture.
Both share the same high-level scan/cache/save/write flow, so most of this section applies regardless of which module is fitted. In the NFC menu the Backend row is a toggle - off selects the PN532, on selects the ST25R3916. The CLI can also select a backend with nfc backend auto|pn532|st25r.
- auto (CLI only) tries PN532 first, then ST25R3916.
- pn532 forces the PN532 path.
- st25r forces the ST25R3916 path. Emulation always forces ST25R3916 since the PN532 cannot emulate here.