SparkFun M6E Nano Change PC and AFI in EPC

Sensors NFC & RFID
1

Hello!

i have to change the PC-Word and the AFI. But when i read the EPC, i only see the UserData.

Can somebody help me?

Thanks!

UII.PNG

2

as you point out the first 16 bits (1 word) on the EPC bank are CRC, the second word is the PC + AFI. If you look at writeTagEPC or readTagEPC() in the library you will see an address of 2 ( words) If you change that to 1 word you will be able to read the PC and AFI

3

WOOW THANKS A LOT!!! I will try it immediately and give feedback!

4

of course in examples you need to change the size of the “EPC” to read… normally that is 12 bytes ( 96 bits), but it now needs to be 2 (PC) + 12 (EPC) is 14 bytes… the CRC is normally calculated by the Nano / Tag

5

It doesnt work ?

If i read the EPC with 12Byte i will get:

39 59 2B 53 54 30 30 30 30 30 30 30

with 14 bytes

39 59 2B 53 54 30 30 30 30 30 30 30 30 30

the first 4 chars are 9Y+S

its still the same. But the PC AFI is in front of this chars.

i cannot see the first 4 byte ( CRC + PC + AFI )

@ paulvha:

i didnt find this adress. maybe i have the wrong library?

Thanks@ all

6

i found the solution.

you have to use the Read all bank sample and read Bank 01.