NRF52840

[Oli]

https://www.nordicsemi.com/eng/Products/Getting-started-with-the-nRF52840-Development-Kit

Hellosupport,

Just got my 52840-DK board (v. 1.0.0), got the pulsing LEDs but couldn't make the NFC demo with the phone work. So, I decided to follow the instructions on the jump start page  and update the firmware. Since then, no pulsing LEDs and still no NFC. I noticed now, too late, that the firmware link on this page has actually a name in the form of nrf52832, not 52840...Is this the right firmware???

The page in question is the one at the beginning of my post.

Thanks,

Oli

[Andreas]

Hi,

 

I am not sure why the pre-flashed demo did not work, but when you flashed the nRF52832 you loaded an image that runs, but uses different pins for toggling the LEDs (the LEDs are connected to different pins on the nRF52832 DK and nRF52840 DK). You can find the binary in the SDK (download it here if you need), it is the 'preflash example' under /examples/peripheral/preflash/. Make sure you flash the 'pca10056' version. 

There should not be any reason why the NFC part should not work here. I know this is a stupid question, and I apologize for that, but you have enabled NFC in your phone, right?

 

Best regards,

Andreas

[Oli]

Hi Andreas,

Sorry for the late reply. I got to travel to a different time zone and got no time to look into this.

Indeed, I was able to recover the preflash version. Thanks a lot for the pointer.

My phone still does not want to react to the NFC (yes, I have enabled it :) ). I will check with another phone once I get back home. I was able to get the nRF app connect to the BT though.

Thanks again for your help,

Oli

[Andreas]

Hi Oli,

 

No need to apologize, please feel free to reply at your own convenience.

 

The preflash example should work, I just flashed the precompiled PCA10056 hex file and it works just fine here. Are you able to spot any damage to the DK? E.g. any of C46, C47, R46 or R44 not mounted?

 

Best regards,

Andreas

[Oli]

Hi Andreas,

It took numerous trials to eventually have it work. Looks like the NFC range is very small and required that my phone's antenna (above the camera lens) be exactly in the flex antenna's field. So, it worked.

I'm good to go, moving forward back in time to programming lessons years back

Thanks again for all your help,

Oli

[Andreas]

Hi Oli,

 

Happy to hear it. It might sound like the NFC part of your phone might not be the best. Range with the DK is seldomly more than 20-30mm, but it should not be too hard to get it working, maybe you have better luck with a different phone? 

 

Anyway, good luck with your development. We are here to assist with any problem you might be facing.

 

Best regards,

Andreas