ble_app_hrs_nfc_pairing example not building

[Aleksa]

Hi,

I was looking for an example that combines NFC functionality with BLE for pairing purposes so I was pleasantly surprised when I found that there is such an example. Normally I opened the solution in SES and expected it to build out of the box but I get a very strange error.

In file nrf_crypto_rng_backend.h compiler throws an error "nrf_hw_backend_rng_mbedtls.h: No such file or directory". I verified in the project options in preprocessor tab that ../../../../../../../components/libraries/crypto/backend/nrf_hw is included. Also, I can "go to included file" and find it so to me it seems that it is in fact included in the project.

So how should I proceed in getting the example to build correctly so I can evaluate it?

Thanks,

Aleksa

[Aleksa]

So are you suggesting that I should downgrade to SDK 16? Can you point me to the version of SDK that does build the example?

[awneil]

probably better to wait for someone who has 17 to verify.

Or just investigate further: it's a standard 'C' thing - not specific to Nordic or SES ...

[Aleksa]

Yeah, it's a standard C thing in the example that is provided by your official release of SDK so I think that asking for support here is appropriate. 

[Simonr]

Hi Aleksa and awneil

I just tested this out, both on SES v4.18 (arbitrary version for good measure) and SES v5.10. I did not have any problems building and flashing the ble_app_hrs_nfc_pairing example for the nRF52832 in SDK 17.0.0 on either of these SES versions.

What I suspect is the issue, is that the path to nrf_hw is too long in your case. If you store the SDK closer to the root path, the application should be able t build. Alternatively, you can try flashing the precompiled .hex file located in \SDK_FOLDER\examples\ble_peripheral\experimental\ble_app_hrs_nfc_pairing\hex onto your device using the nRFConnect for Desktop Programmer app, or nrfjprog (the nRF Command Line Tools).

Best regards,

Simon

[Aleksa]

That actually was the problem. I just moved the whole SDK a couple of folders up, and it magically compiled. This was exactly the type of response I was expecting so thank you very much Simon.