NFCのトピックCommunicate with two NTAG213 tags in parallel

Communicate with two NTAG213 tags in parallel

dudi — Tue, 28 Jul 2020 08:04:11 GMT

I am working with NFC reader PN7150 and NTAG213 tags and trying to read from 2 tags in parallel.

I am using your example code: NXP-NCI_LPC11Uxx_MultipleNtag213example

Both tags are identified and activated correctly but reading and writing performed only from 1 tag.

I have noticed that when i execute command: NxpNci_ReaderReActivate(&RfInterface[0]) once, i can work with the second tag but when i do that again i can't return to the first tag.

It looks like when i deactivate a tag, i cannot reactivate it again, but i need to stop and start discovery in order to activate both tags.

Is the mentioned example works for you as is on two tags?

It that phenomenon known to you?

Is that related to FW, HW or tag versions?

p.s

I can communicate with one tag before Re-Activating the other tag, and then communicating with the second tag. But i cant return to the first tag.

Many Thanks,

Dudi

Re: Communicate with two NTAG213 tags in parallel

Kan_Li — Tue, 04 Aug 2020 02:22:00 GMT

Hello Dudi,

Do you have the NCI log from that case? Is it possible to share with us for analyze?

Thanks for your patience!

Have a great day,
Kan

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Re: Communicate with two NTAG213 tags in parallel

dudi — Tue, 04 Aug 2020 04:29:33 GMT

Hello Kan_Li,

The log does not add further information then the original description.

Reading and writing execute from the same tag and not from two different tags.

Regards,

Dudi

Re: Communicate with two NTAG213 tags in parallel

Kan_Li — Tue, 04 Aug 2020 07:51:59 GMT

Hi Dudi,

As I don't know what changes you made in this example, so NCI communication logs would help us better analyze this problem. for example, you mentioned " when i execute command: NxpNci_ReaderReActivate(&RfInterface[0]) once, i can work with the second tag but when i do that again i can't return to the first tag." We may know what has happened in your case, but we don't know the details with this description, for example, what is the response from the tag? with NCI log, we may have such kind of information, which may lead us to the root cause.

Thanks for your patience and understanding!

Have a great day,
Kan