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  1. #1
    Registered User
    Join Date
    Dec 2012
    Posts
    5

    Problem reading NFC tag uid using Lumia 620 (Urgent)

    Hi, I'm trying to read NFC Tag's UID using my Lumia 620, but it seems that WP8 SDK doesn't support this. Has anyone ever done this before? Please give me some tips, thanks!

  2. #2
    Registered User
    Join Date
    Dec 2012
    Posts
    5

    Re: Problem reading NFC tag uid using Lumia 620 (Urgent)

    Anyone? I'm really confused and need some helps.
    Thanks.

  3. #3
    Registered User
    Join Date
    Jan 2013
    Posts
    4

    Re: Problem reading NFC tag uid using Lumia 620 (Urgent)

    Windows Phone SDK not support reading UID now.

  4. #4
    Registered User
    Join Date
    Jun 2011
    Location
    Egypt
    Posts
    47

    Re: Problem reading NFC tag uid using Lumia 620 (Urgent)

    I've already tried about a month and did not work also

  5. #5
    Nokia Developer Moderator
    Join Date
    Feb 2011
    Location
    Portugal
    Posts
    948

    Re: Problem reading NFC tag uid using Lumia 620 (Urgent)

    There is a way to identify a tag by its ID using the WP8 SDK currently. Write the ID to it.

    NDEF supports multiple message. You can place on first record the messaqe you want the phone to read by default, and on the second message you can add an ID that you can then read on your app by cycling through all messages on a TAG. The problem with this approach is that it will use a bit of space on the TAG and not always that is an alternative because some tags have only a bit more than 40 bytes of writable surface.

    The ID you can use either the TAG ID that some have writen on the tag it self or just create a new ID of your own to uniquely identity the tag.

    Don't forget that Windows Phone SFK does not support write protecting the tags, so if this is a critical information that you dont want anyone to touch, then you also need to implement a hashing mechanism and add that to yet another message on the tag so you can validate if the tag was changed.

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