About 4 byte UID and 7 byte UID for MIFARE 1K - FAQ -
2018-2-5u2002·u2002So the MIFARE 1K card with 7 byte UID code appeared. As the MIFARE 1K chip code varies so much, sometimes, the MIFARE 1K cards from different factories is not compatible with all the MIFARE readers in the market, there are two reasons for this phenomenon: 1, the classic 4-byte UID MIFARE 1K cards only need one cascade of anti-collision to ...
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