How to change the emulated nfc card type in firmware

[febinzcs]

Hi,
I'm using the nfc example "record text" to transfer text to polling devices. I'm using the nfc tools mobile app for android and found the nfc tag type as MiFare Ultralight, when the 5340dk is detected in the app.
Is there a way to change this to other card, thereby increase the memory size of the tag. Found that the MiFare Ultralight's memory size is 144bytes, can we increase this size if another card is being emulated instead.

[Hung Bui]

Hi Febin, 

It's showed up as Mifare Ultralight most likely because the tag emulate NFC Forum Tag Type 2. 
Which sample did you use on the nRF5340 ? 
Have you tried https://developer.nordicsemi.com/nRF_Connect_SDK/doc/2.5.0/nrf/samples/nfc/writable_ndef_msg/README.html

As far as I know the sample will set up the tag as NFC Forum Tag type 4 

[febinzcs]

I've tried with the "writable ndef message" sample, and the nrf5340 is detected as MiFare plus with around 1KB storage. Any info on the NDEF message chunking that I've mentioned earlier would be really helpful.

Thanks.

[Hung Bui]

Hi Febin, 
I don't have any information on if the Zephyr support chunking in the NFC library or not. You may want to find that in the source code or ask Zephyr's discord community.