FlexDF Formatting Debacle


#1

Hey there👋!

So I’ve had my FlexDF implant for around a while and I absolutely love it! But recently, while messing around with it, I mistakenly formatted it to factory reset. And so, since the chip is currently an empty tag that seems to be unable to recognize NDEF-based commands, would there be any method to have it regain its original function or is there perhaps another function that the tag still retains after the reset?


#2

Hmm… well, if the ndef application was removed, it will have to be re-instantiated… try TagWriter from NXP to write NDEF data… or perform a format from within TagWriter… that should install the NDEF AID on the chip, then you should be able to write NDEF data to it.


#3

Hey Amal,

Thanks so much for the suggestion! I tried out TagWriter, but it ends up declaring that it isn’t able to format the tag. Likewise, I also seem to be unable to write any NDEF data onto the tag with TagWriter. :sweat: Do you think there could be another method to re-instantiate the NDEF application on the tag? Or is there maybe a feature on TagWriter that could also hold such promise? If not, then would I possibly need to replace install another FlexDF chip?


#4

I am sure there is a method to fix it, but I have not taken the time to figure it out. I think you will probably need something like NFC Shell or the Advanced capabilities of NFC Tools to send specific commands to the chip. I think you have some reading to do now with the DESFire EV1 documentation to figure it out.