New ACR122U-A9 do not work with libnfc, report different PICC interface.

[XZF0]

I have just got several brand-new ACR122U-A9 units; quite unexpectedly, they report a different PICC interface, and do not work (do not read any cards, and hang / never exit from nfc-list). The "old" units I have work as expected. Are these "new" units actually fakes, or some undocumented internal change by the manufacturer that breaks libnfc (or requires reconfiguring / recompiling?)

I really need these new units to work, so help is much appreciated.

The external appearance appear identical except for a thicker plastic on the USB plug on the "new" units; the information labels look identical textually except for the serial numbers (the "old" are lower: RR171-323xxx vs RR171-399xxx) but subtly different in typography.

OS: Ubuntu 18.04

"old" : libnfc.general "ACS / ACR122U PICC Interface" "new" : libnfc.general "RFCARD / RF1258V603 PICC Interface"

LIBNFC_LOG_LEVEL=3 nfc-list -v output files are attached (the "new" hangs and never completes)

nfc-list.new.log3.txt nfc-list.old.log3.txt

[remytms]

Facing the same issue. Seams related to this issue #535.

[poolochon]

Same issue

[thekix]

Could you try this version? https://github.com/thekix/libnfc

I requested a merge with libnfc yesterday.

Regards, kix

[alexandredubois]

Hi, I think the fix provided in https://github.com/nfc-tools/libnfc/pull/561 is a bit cleaner dont'you think ? Regards, Alexandre

[thekix]

IMO, the patch provided at #563 is better. IMO, the alternate calls are not needed wit these devices (old and new ACR122). I tested the patch (see #564) reading, writing and Writing (sector 0) with the patch provided (#563) and with new and the old devices, it works fine. IMO, the patch removing the alternate calls is better, because removes code not needed by these devices.