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  • Case ID: 327373
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NRF52840DK NFC Sample applications not working on Zephyr

Mikeyd0407

Hi,

I'm trying to setup my NFR52840 DK to act as a NFC tag so that I can read some simple data on my phone via NFC transfer.

I have tried a few NFC sample applications (record_txt & record_launch_app) but I can not get my phone to detect anything. I have tried loading the applications on a couple of NRF52840 DKs and have tried multiple NFC antennas (so I'm pretty sure the hardware is not at fault as at least one of the two boards should work). I have tried a few Android phone apps (Nordic's 'nRF NFC Toolbox' and NXP's 'TagInfo'). I confident that my phones NFC is working okay (as I use it on Android pay and I also have an old hotel security NFC key card that can be read by both apps).

I set the target as the NRF52840 DK when imported the sample code into VS Code editor.  I built the code using a pristine build in Zephyr without any errors or warnings. Lokking at the kconfig GUI, it suggests that the NFC is enabled for the build.

When I flash the device I get the usual messages in the COM terminal window (for the 'record_text' sample it displays:

***Booting nRF SDK 2.5.0 ***

Starting NFC Text Record example

NFC Configuration Done

So the code seems to be executing okay.

When I put my phone over the antenna to read the TAG information nothing happens. LED1 is not illuminated and the phone doe not detect an active TAG.

Please can you give me some ideas of where I might be going wrong or is there a problem with the Zephyr sample applications?

Best regards

Michael

Parents Reply Children
  • 0 in reply to Jared

    Hi Jared, is that the SDK in Zephyr (which is the SDK I am using)?

    Can you share the generated hex file output so that I can try it to test my hardware.

    Also is it possible to share the Zephyr project (in it's entirety so I avoid any import issues (as when I bring the record_test sample into Zephyr mine doesn't work).

    What phone app are you using to scan the tag?

    Cheers 

    Michael 

  • 0 in reply to Mikeyd0407

    Hi,

    Yes that is the Zephyr based SDK, namely nRF Connect SDK.

    I used the v2.5.0.

    Here is the build folder with hex file:

    2475.build.7z

    I've tested with the Google Pixel 7 Pro and with a Samsung phone as well.

    regards

    Jared 

  • 0 in reply to Jared

    Hi Jared,

    Sorry I haven't got back to you earlier as I have been busy on other urgent projects.

    Unfortunately I am still having issues with this. I have downloaded the zip file and extracted the Zephyr.Hex file (117kb) from the Zephyr directory. I have flashed the hex code to Two of my NRf52 DK boards it using the NRF programmer utility.

    Both boards seem to program okay (no reported errors).

    When I use the Nordic NRF NFC tag tool on my phone, neither board is detected as a NFC tag device.

    My phones NFC tag reader seems to be working as it still detect an old NFC hotel room key card (as shown in the picture).

    I tried to open your project in Zephyr to recompile/debug the code but it says that the project does not contain an application source:

    Any ideas as where I could be going wrong? Is there a hardware switch on the NRF52 DK, or if it just a case of plugging in the NFC antenna?

    Kind regards

    Michael

  • 0 in reply to Jared

    Hi Jared,

    Please see my reply below - I'm still looking for a solution. I can't import the project zip contents as an application into Zephyr /VSCode as it says the folder does not contain an application

  • 0 in reply to Mikeyd0407

    Hi,

    You're using a preview development kit. A PDK is an early version of a DK that contains an engineering version of the nRF52840 instead of a release version. 

    The PDKs are not supported in NCS,

    Buy a Development Kit,

    regards

    Jared 

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