NTAG424 Save 64 chars of data

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NTAG424 Save 64 chars of data

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Godspeed
Contributor I

Hello guys,

With a lot of Googling and reading other posts I was able to use the Mirroring Feature to construct the URL that I wanted my NFC to generate, but I only succeed with configuring the chip with setting SDM Encrypted File Length to 32. While I need to set this to 64, I want to safely store a value like below, where the xxxxxx should be indeed valid HEX characters.

ba4941dxxxxxx74533922xxxxxx2e82cfc5a8xxxxxx72d2bdd516220784b7f24

 

The URL should look something like:

https://floor.bazinga.com/pages/nfc/mypet124?picc_data=FD91EC264309878BE6345CBE53BADF40&enc=CEE9A53E...


I got the 32 file length working with the below configuration (screenshot in attachment), but I can't seem to find the 64 character configuration. This should just work right?

 

Setting the Mirror Features setting to below settings works: 

floor.basinga.com/pages/nfc/mypet214?picc_data=0000000000000000000000000000000000000000000000000000000000000000&enc=00000000000000000000000000000000&cmac=0000000000000000


But when I set the SDM Encrypted File Length value to 64 I get an error: Error 919E 

I found on Google this had something to do with the length, but I'm guessing that there should be enough space available to save the above data, right? 

Thanks in advance for any guidance or input!

 

 

 

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danielchen
NXP TechSupport
NXP TechSupport

Hi Godspeed

 

Do you use NTAG424 DNA or NTAG424 DNA TT? Do you have detailed steps to reproduce your issue on my side?

 

Regards

Daniel

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