Hello,
I just got the Adafruit PN532 NFC/RFID Controller Shield for Arduino + Extras and I ran the test program and it was able to read the card that came with it.
I bought some Topaz 512 NFC tags (http://www.amazon.com/NFC-tags-NFC-Keyc ... B00FS4AF0S) but it doesn't seem to be able to read them. Any Ideas?
Thanks.
Reading topaz 512 tags with Adafruit PN532 NFC/RFID
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Please be positive and constructive with your questions and comments.
- malmadhi
- Posts: 3
- Joined: Sat Sep 13, 2014 9:44 pm
- Digitalconsult
- Posts: 1
- Joined: Sun Sep 14, 2014 3:01 am
Re: Reading topaz 512 tags with Adafruit PN532 NFC/RFID
Same problem for me
- adafruit_support_mike
- Posts: 67454
- Joined: Thu Feb 11, 2010 2:51 pm
Re: Reading topaz 512 tags with Adafruit PN532 NFC/RFID
I had to dig a while to find a datasheet for those, but apparetly they use Type-A modulation, which is compatible with the PN532.
The next most likely source of trouble would be if the tags are NDEF formatted. The Adafruit NFC library doesn't support NDEF because a complete implementation of it requires more memory than an Arduino has.
The next most likely source of trouble would be if the tags are NDEF formatted. The Adafruit NFC library doesn't support NDEF because a complete implementation of it requires more memory than an Arduino has.
- malmadhi
- Posts: 3
- Joined: Sat Sep 13, 2014 9:44 pm
Re: Reading topaz 512 tags with Adafruit PN532 NFC/RFID
Can I change the formatting of the tags?
- Franklin97355
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- Joined: Mon Apr 21, 2008 2:33 pm
Re: Reading topaz 512 tags with Adafruit PN532 NFC/RFID
You can check with the maker here.
- malmadhi
- Posts: 3
- Joined: Sat Sep 13, 2014 9:44 pm
Re: Reading topaz 512 tags with Adafruit PN532 NFC/RFID
So I ordered the tags with the 1K chip from the same company and those worked with the NFC shield. I think Adafruit should test with the Topaz 512 chip to see if it works and warn users.
- Franklin97355
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- Joined: Mon Apr 21, 2008 2:33 pm
Re: Reading topaz 512 tags with Adafruit PN532 NFC/RFID
Have you tried the example sketch mifareclassic_ndeftoclassic ?
- ktownsend
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Re: Reading topaz 512 tags with Adafruit PN532 NFC/RFID
We don't support Topaz tags, nor any card format aside from Mifare Classic and Mifare Ultrlalight. The PN532 CAN read Topaz tags, as well as a large variety of other tags such as Mifare DESFire, etc., but each card has it's own requirements and requires custom SW per card family.
For example, the memory layout on Mifare Classic cards is very different from the memory layout and security on Mifare Ultralight cards, and custom development needs to be done for each card, even within the same family and using the same basic modulation.
Unfortunately, we can't possibly cover every possible card format, which is a huge range in the 13.56MHz ISO14443A world, and we settled largely on supporting Mifare Classic since it is the easiest to order and very common in the real world (Mifare has a very large percentage of the RFID tag market, whereas Topaz is much more specialized).
For example, the memory layout on Mifare Classic cards is very different from the memory layout and security on Mifare Ultralight cards, and custom development needs to be done for each card, even within the same family and using the same basic modulation.
Unfortunately, we can't possibly cover every possible card format, which is a huge range in the 13.56MHz ISO14443A world, and we settled largely on supporting Mifare Classic since it is the easiest to order and very common in the real world (Mifare has a very large percentage of the RFID tag market, whereas Topaz is much more specialized).
Please be positive and constructive with your questions and comments.