[Ask]Read overwrite/formated NFC Card

Projects Programming
1

Hi, I have a module using NFC Shield PN 532.
I have problem to read the formatted or over write card.
i guest the problem is when the authentication card.

at the example code :
uint8_t keys[]= {0xFF,0xFF,0xFF,0xFF,0xFF,0xFF}; // default key of a fresh card
nfc.authenticateBlock(1, id ,0, KEY_A,keys)

at the formatted card the keys :
Public KEY A of NFC Sectors

BYTE 0 BYTE 1 BYTE 2 BYTE 3 BYTE 4 BYTE 5
0xD3 0xF7 0xD3 0xF7 0xD3 0xF7

how to read both of the fresh card and formated card?

2

Did you ever figure it out? I'm having similar issues with Mifare ultra-light NFC stickers.

uint8_t keys[]= {0xFF,0xFF,0xFF,0xFF,0xFF,0xFF};  // default key of a fresh card
if(nfc.authenticateBlock(1, id ,blockn,KEY_A,keys){...}

I tried the code above with the default key but no luck.