BlockchainCommons / BlockchainCommons/GordianSeedTool-iOS

BUG: Writes to Large NFC Tags Fails

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#173 1 comment 0 reactions 0 assignees View on GitHub
enhancement
Dominant language
Swift
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51
Forks
10
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No merged PRs in 30d

Description

Writes to large NFC Tags never occur. No errors, no timeout, just no writing.

924 byte NFC Tags work fine at the upper end, 8 kbyte NFC Tags fail at the lower end. The exact boundary is presumably somewhere in between.

Potentially, this could be an issue with a single manufacturer. The precise cards we're having problems with are Mifare Desfire EV1 8K, part #B2004-5, or on Amazing B01FR6GZQY.

If we write an initial record on [NFC Tools](https://apps.apple.com/us/app/nfc-tools/id1252962749), they then become normally writable and readable, which suggests there is _some_ way to do it in iOS, just not with Apple's normal tools.

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