I am developing a system that includes NFC tags and an Android phone using a unique NFC tag identifier. But I don’t know what is the difference between type 4 NFC tags. I found this:
"NFC-compatible tags may have the following technologies / standards and each of them has a different concept ID:
NFC Tag1 : Topaz/Jewel
NFC Tag2 : Mifare UL (ISO14443A-3)
NFC Tag3 : JIS X 6319-4 (FeliCa)
NFC Tag4 : ISO14443-4A or ISO14443-4B tag
There is also unofficial support for Mifare Classic cards in the form of NFC tags. And each of them defines a certain identification number.
- Topaz / gem has a 4-byte identifier
- Mifare UL has a 7-byte UID
- Mifare Classic has 4 or 7 byte UID
- FeliCa has an 8-byte identifier
- ISO14443-4A has 4, 7 or 11 byte UID
- ISO14443-4B has 4 byte PUPI
nfc-list, , .
. nfc-list.c, . "
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