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The read_tag.py diagnostic script had stale PN5180 NTAG methods: TX CRC was off (should be on), no Crypto1 clear, no IDLE→TRANSCEIVE state reset. Multi-batch reads failed because the PN5180 enters an unrecoverable state after an NTAG READ — requires a full GPIO hardware reset between 4-page batches. Also rejected SAK 0x04 as unsupported, and failed hard when reading past the end of smaller tags (MIFARE Ultralight has 16 pages vs NTAG's 44+). Synced write methods with daemon.