Different Hex codes?

[gdobrasnki]

What am i missing here.

I have a third party reader that read a card to a DB as
04 A3 C6 CA E2 61 80

I can use the RC512 with an adriuno UNO and read the card as
04 A3 C6 CA E2 61 80
(example and library here:https://randomnerdtutorials.com/security-access-using-mfrc522-rfid-reader-with-arduino/ )

I use your package and get the following read.

New card detected

• tag type: 0x10
• uid : 0x8804a3c6

Have i just been up too long? that hex isn't the same as the ones above?

Edit: Just noticing that it is a partial match

Overlap in 04 A3 C6 CA E2 61 80
but fails to collect the second half?
also the 88 at the beginning doesn't show up on other readers.

[jlq76]

The 0x88 is a CT (Continuation Tag) that specifies that the UID uses 7 bytes and not 4 bytes.
Unfortunately the anticoll() function here only supports 4 bytes UID.
I saw some examples online using a second function, amticoll2(), when the first byte is 0x88 but so far I'm not successful to get it work with this package.