RC522 RFID Sensor and Mifare 1k card problems

Hi there,

So let me explain the problem, today i got my RC552 and after using the miguelbalboa/rfid library and playing around with what I can do, I noticed that on the 2nd input on the personal information example that it was coming up with a NAK error

Below is 3 of the sectors from the memory dump:

   2     11   00 00 00 00  00 00 FF 07  80 69 FF FF  FF FF FF FF  [ 0 0 1 ] 
         10   00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00  [ 0 0 0 ] 
          9   00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00  [ 0 0 0 ] 
          8   00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00  [ 0 0 0 ] 

   1      7   00 00 00 00  00 00 19 67  8E 00 00 00  00 00 00 00  [ 0 1 1 ] 
          6   E1 00 00 00  1E FF FF FF  E1 00 00 00  06 F9 06 F9  [ 1 1 0 ]  Value=0xE1 Adr=0x6
          5   0D 00 00 00  F2 FF FF FF  0D 00 00 00  05 FA 05 FA  [ 1 1 0 ]  Value=0xD Adr=0x5
          4   41 41 52 4F  4E 4E 43 55  4E 4C 49 46  46 45 45 73  [ 0 0 0 ] 

   0      3   00 00 00 00  00 00 FF 07  80 69 FF FF  FF FF FF FF  [ 0 0 1 ] 
          2   73 73 73 73  73 73 73 73  73 73 73 73  73 73 00 25  [ 0 0 0 ] 
          1   41 41 52 4F  4E 4E 43 55  4E 4C 49 46  46 45 45 73  [ 0 0 0 ] 
          0   24 01 44 03  62 08 04 00  62 63 64 65  66 67 68 69  [ 0 0 0 ]

It is too my understanding that block 7 is meant to be the same as block 3 and 11 containing the 2 keys A, B and the access bits? so somewhere I must have managed to overwrite this, and from what I have read online that can sometimes cause that sector on the card to become unusable, however I can still write to and change data in block 6, 5 and 4. using the libraries "Classic Value Block" example of the library

Does anyone have any suggestion as to a way I can restore the card to being blank card? with the correct formatting.

Thanks

Aaron

By use Android NFC enable phone/pad.

Mifare Classic Tool - MCT

https://play.google.com/store/apps/details?id=de.syss.MifareClassicTool&hl=en

You could restored the card back to the default factory/delivery state.