Using secure dfu without LOG (in release)

[Luccas]

Hello,

I'm facing some problems when trying to migrate from secure dfu debug to release mode.

I set the nrf_log to use uart instead of rtt in both debug and release versions, when using debug, all process went ok, then I removed the DEBUG define and kept the uart on (using same link file from debug), I also updated the init package with non-debug. This process went ok too, I could update the firmware checking on uart the results.

But my problem was with consumption, with uart on I got an increase of ~450uA. So I just removed the uart, but now when I try to update the firmware via dfu, I get error 8 (GATT CONN TIMEOUT). If I turn uart on again, all goes back to normal (with high curr)

Is this anyway related to nrf_log_info usage without uart?

I set all configurations on sdk_config.h

[Hung Bui]

Hi Luccas,

Which SDK are you using ?

Have you tried to disable LOG ? NRF_LOG_ENABLED = 0 ? When exactly do you get GATT CONN TIMEOUT ?

Do you have same problem when you test with the stock (release) example ?

[Luccas]

Hi, I'm using SDK 12.1, yes I tried to disabled LOG and UART. After doing this I 'm still able to connect to DfuTarg, but when I send the package I get the TIMEOUT. I'll try more tests using stock example, I tried once without success also.

[Luccas]

So I tried to update sdk to last one (13.0.0) together with S132 v4.0.2, and followed this guide devzone.nordicsemi.com/.../

I could generate my init package and connect to dfuTarg that uses my own dfu_pub_key. But now I got another error: REMOTE DFU INVALID CRC ERROR. I used the same function form guide for generating .zip package. Any tips?

Thank you very much for your attention!

[Hung Bui]

Have you made sure you use the same private.key file to generate the public_key.c and the DFU .zip package ?

You may want to send me the .zip file, the private key you generate, the publickey.c, the bootloader hex, the application hex file (any hex file maybe from one of our example) so I can check here.

[Luccas]

Hi, I just tried to load the bootloader_secure example (release) and created an package from ble_app_hrs example, using a new generated key pair. It worked this way! Now I'm trying to discover why I couldn't do it with my app, maybe because nrfutil wasn't up to date. Thanks for the quick reply. Your guide is very useful! If I can't get it to work I'll get in touch. =)