store a serial number permanently in NFC EEPROM

[NK R.2]

Hi ,

I integrated st25dv64kc nfc tag into stm32 board. I have to store a serial number permanently in NFC EEPROM user area. It should not be erased in RF write and I2c Write. I used NDEF format . 

Is it possible to store text permanently ?

[NK R.2]

Hi Lebon,

Thank you for your quick reply.

Please find the below link of NFC app which I am using.

https://play.google.com/store/apps/details?id=com.wakdev.wdnfc&hl=en&gl=US&pli=1

When you read memory at I2C address 800h from I2C interface, is your data correct ?

>>>>> Yes . I am able to read correct data at I2C address 800h from I2C interface.

Regards,

Neethu

[JL. Lebon · Accepted solution]

Hello Neethu,

Ok, so if the data is correct using i2C read, this means that the application is not able to read the data at this place in memory (probably using read Single Blocks command)

Can you please try this application: https://play.google.com/store/apps/details?id=com.st.st25nfc&hl=en&gl=US

Also, if your NDEF file is to be from block 0000h to block 01ffh, you need a special CC file on two blocks (CCFile on 1 block will allow NDEF file only up to block FFh).

The application I recommend you will create the appropriate CCFile for you (I think NFC tool may not create the correct CCFile) If you want infor on CCFile format, please read this application note: https://www.st.com/resource/en/application_note/an4911-ndef-management-with-st25dvi2c-series-and-st25tv16k-and-st25tv64k-products-stmicroelectronics.pdf

Best regards.

[NK R.2]

Hi Lebon,

Thank you.

I will do further testing using new NFC application you suggested .

Regards,

Neethu