Porting existing NFC Tag Type 2 to NFC Tag Type 4 -- Is there a cheat sheet and/or message sequence charts

RE: Porting existing NFC Tag Type 2 to NFC Tag Type 4 -- Is there a cheat sheet and/or message sequence charts

Mahendra Tailor — Mon, 12 Feb 2018 16:06:39 GMT

I have managed to read type 4 tags using your Adafruit Tag Reader Example.

Panic over. Thank you. This case can be closed.

RE: Porting existing NFC Tag Type 2 to NFC Tag Type 4 -- Is there a cheat sheet and/or message sequence charts

Mahendra Tailor — Mon, 12 Feb 2018 13:54:59 GMT

In SDK 14.2.0 I have located the sample app "Adafruit Tag Reader"
When I load the app in a PCA10040 I am getting the following error "ERROR 33281 [NRF_ERROR_DRV_TWI_ERR_ANACK] at ..\..\..\main.c:403"
This is the first time I am using an Arduino Shield with the PCA10040, is there any preconfiguration I need to do it.

I know my Adafruit shield works because it has been working on my UNO for over 2 years and I am using it in I2C mode

Look forward to hearing from you

RE: Porting existing NFC Tag Type 2 to NFC Tag Type 4 -- Is there a cheat sheet and/or message sequence charts

Mahendra Tailor — Mon, 12 Feb 2018 11:39:47 GMT

I have got my t4t firmware to build and have added the 2 byte length in front of my ndef message.
For type 2 tags, I was using an Arduino + Adafruit PN532 shield to test the functionality.

Can you suggest how I can now test type 4 tags to validate that all my code is working?

RE: Porting existing NFC Tag Type 2 to NFC Tag Type 4 -- Is there a cheat sheet and/or message sequence charts

Mahendra Tailor — Fri, 09 Feb 2018 17:08:05 GMT

As you can see when I bring the AdaFruit reader to the coil I get the above.
I know my ndef message contains 3 messages.

Also why does it say "NFC Forum Type 2" should it not be "NFC Form Type 4" ?

The source code is certainly organised in an orthogonal fashion which is good, but the run time example could be better designed

Really looking forward to solving this. More than a year ago when I added NFC to our module it took me 3 weeks to get it to work simply because there was no documentation about the fact that the timer 4 was needed.

RE: Porting existing NFC Tag Type 2 to NFC Tag Type 4 -- Is there a cheat sheet and/or message sequence charts

Mahendra Tailor — Fri, 09 Feb 2018 16:24:42 GMT

devzone.nordicsemi.com/.../sdk_5F00_config_5F00_nfc_5F00_type4.h devzone.nordicsemi.com/.../5270.sdk_5F00_config.h

Are my sdk config files.

To be honest - what is the story behind these sdk_config.h files?
Is there a Nordic utility to view and generate them?

RE: Porting existing NFC Tag Type 2 to NFC Tag Type 4 -- Is there a cheat sheet and/or message sequence charts

Mahendra Tailor — Fri, 09 Feb 2018 14:22:25 GMT

The more I dig into the t4t library, I am confused if there is even a simple application to show how a read-only tag with 'hello world' will be sent.

RE: Porting existing NFC Tag Type 2 to NFC Tag Type 4 -- Is there a cheat sheet and/or message sequence charts

Mahendra Tailor — Fri, 09 Feb 2018 13:09:19 GMT

In the t2t library, there is a function called nfc_t2t_payload_set().
What is the equivalent function in t4t library ?