NFC03A1 unable to read/write mifare classic tags

[venukrish]

we are attempting to read wristband mifare classic tag using NFC03A1

NFC03A1 is able to detect the tag UID.

when we execute ndefPollerReadBytes().. directly, we get ret = 04 (ERR_TIMEOUT)

need some sample code to read this tag...

from your forum i understood that we need to perform authentication before we can read/write

https://community.st.com/t5/st25-nfc-rfid-tags-and-readers/st25r3917-mifare-license/m-p/232467

we prefer ndefPollerReadBytes/ndefPollerWriteBytes() to store data directly

kindly suggest the rfal call sequence with examples..

PS: used android nfctool application to read the tag.

[Ulysses HERNIOSUS · Accepted solution]

Hi venukrish,

Mifare Classic outside NFC Forum scope. Only a limited number of NFC-enabled Android phones can read the NDEF content from these tags.

So in my opinion there is not really a use for writing NDEF content to tags which can only be read by few Android phones.

ST cannot provide code for authenticating + reading/writing Mifare Classic tags.

BR, Ulysses