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michael db492050e3 Add hall sensor circuit design, NTAG5 config check tool, I2C bus docs
- Hall sensor + LP5562 EN wired-AND circuit design (DRV5032FB/FE,
  1M pull-up, open-drain topology) with three interaction modes:
  boot-time recovery, tap-to-swap, hold-to-confirm recovery
- NTAG5 config check tool (tools/ntag5_config_check.py) using
  uFCoder library for ISO15693 transparent mode via uFR Zero reader.
  Supports inventory + addressed mode for multi-tag fields.
- Updated DEVELOPMENT_PLAN with I2C bus management notes for
  LP5562 (0x30) + NTAG5Link (0x54) shared bus
- Updated README with wired-AND hardware diagram, hall sensor
  interaction section, and updated wiring table
- Updated CLAUDE.md with LP5562 EN wired-AND topology docs
- Updated STATUS.md with hall sensor decisions and hardware inventory

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
2026-03-03 14:06:11 -08:00
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