NDEF documentation for type 2 Tag.

[spw]

Hi,

I am trying to create a custom NDEF message to write to a NFC tag type 2 using the example code provided here.

https://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.sdk5.v15.0.0%2Fnfc_ndef_message_module_dox.html

According to that, the TNF (type name format) assigned for custom messages is 3, but when compared to thelist of  TNFpossible  values in here: 

https://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.sdk5.v15.0.0%2Fnfc_ndef_format_dox.html

it doesn't make much  sense to me to use that type since type 0x03 corresponds to Absolute URI, while type 0x04 (NFC Forum external type) seems to make more sense for a custom NDEF record. Is this a typo in the documentation? I am kind of new to NDEF so it's possible I am missing something, if so, please don't hesitate on mentioning it.

Thanks

[Hung Bui]

Hi SPW, 

I agree that the example using TNF = 3 could be a bit confusing. My understanding is that in the example the author wanted to show the used of the function for an URI custom text. 
If you are planning to send plain text data that is not URI format, using TNF type = 0x04 is a better option. If you plan to send media type the 0x02 is the one to go for.