iOS Question NFC read the UID

[davemorris]

Hi Guys

I have a problem, I need to read the UID code from a tag (with the B4i NFC library). But according to a post and a reply from Erel ( post #3 see https://www.b4x.com/android/forum/threads/nfc-reading-ndef-tags.84784/)

It is not possible to read the tag UID (iOS limitation).

However, using the the NXP TagInfo App which I installed on my Iphone 7 - it did manage to read the UID code (I have to say it read it for the NXP tags but not for the clones - which is expected).

This quote from Erel dates back to 2017, so I am wondering if it is now possible to read the tag's UID.

Regards

Dave Morris

 

[Erel]

It is possible that they encode the UID as part of the NDEF messages.

As far as I know there is no public API for this.

 

[davemorris]

Hi Erel
Thanks for your response - I tried Googling with the question "apple nfc tag UID support" and got the following - It don't look good but perhaps someone with more iOS experience my be able to find a way through.

https://developer.apple.com/forums/thread/89287- 4 years ago - no luck

https://developer.apple.com/forums/thread/695237 -6 month ago and no-one even answered the post.

Its a big shame as I use the UID to prevent the Tag being duplicated - i.e. it writes a encrypted UID into the data on the chip which is checked by the reader software - I need to look at the data sheets on the Tags, there must be a built-in method to avoid duplicating.

Regards
Dave