drjones/nfc-pn532-warlord
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Add PN532 toolkit firmware, web UI, and embedded SPIFFS assets

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Includes ESP-IDF NFC stack (deep capture, 4K Classic geometry, UL write API,
open SoftAP), React dashboard with live tag diagnostics, and docs. README
updated for APIs and lab Wi-Fi defaults.

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drjones
2026-03-29 09:32:55 -07:00
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# Capabilities & limitations
The PN532 is a **hosted NFC controller**, not a low-level RF lab instrument. This project exposes PN532 features honestly:
- **ISO14443-B**: reader support exists with **chip-level caveats** (anticollision / stack-dependent behavior). No promises of full mobile/PICC coverage.
- **Card emulation / TG modes**: PN532 firmware supports target commands; real-world mimicry depends on timing, UID size, and reader expectations — expose experimentally, not as “propable MIFARE magic.”
- **Key recovery**: on-device “brute force” at Proxmark scale is **infeasible**. The UI provides **dictionary / manual** key workflows.
- **Signal / RF metrics**: diagnostics use **PN532 status / timings / retries**, not calibrated dBm.
- **OTA via UI**: `POST /api/ota` is a **stub** (`501`) — ship OTA with `esp_https_ota` + signed images when you need production updates.