nRF52840 BLE DFU (OTA ) example

RE: nRF52840 BLE DFU (OTA ) example

Amanda Hsieh — Fri, 11 Dec 2020 14:34:33 GMT

Hi Pony,

Which SDK and example are you using?

Does it happen to other example projects?

What version of Keil are you using? Is the license available?

Are you able to use nRF-Command-Line-Tools to program the image?

-Amanda H.

RE: nRF52840 BLE DFU (OTA ) example

Pony Ma — Fri, 11 Dec 2020 13:38:08 GMT

Sorry， I mean: just press this button "load"

did not work.

RE: nRF52840 BLE DFU (OTA ) example

Amanda Hsieh — Fri, 11 Dec 2020 13:01:02 GMT

Hi Pony,

May I know what are the commands you use to generate and flash the images?

You have to download nRF-Command-Line-Tools to generate bootloader_setting and merge the image.

I usually do like this:

mergehex -m softdevice.hex bootloader.hex -o merged_SD_bootloader.hex
nrfjprog --program merged_SD_bootloader.hex --chiperase

nrfutil settings generate --family NRF52840 --application app.hex --application-version 1 --bootloader-version 1 --bl-settings-version 1 settings.hex
mergehex -m hrs_app.hex settings.hex -o merged.hex
nrfjprog --program merged.hex --sectorerase -r

When you generate the bootloader setting, you should use --family NRF52840 for nRF52840.

-Amanda H.

RE: nRF52840 BLE DFU (OTA ) example

Pony Ma — Fri, 11 Dec 2020 12:02:06 GMT

Yes，but MDK Program have no these steps

RE: nRF52840 BLE DFU (OTA ) example

Amanda Hsieh — Fri, 11 Dec 2020 10:35:29 GMT

Hi Pony,

Do you generate bootloader setting and merge bootloader with bootloader_setting.hex as the tutorial?

-Amanda H.

RE: nRF52840 BLE DFU (OTA ) example

Pony Ma — Fri, 11 Dec 2020 10:17:59 GMT

Refer to the website links you provided , I added DFU function to my project ,it works .I could upgrade my firmware upon nrf-connect app.

There is another question :

When I directly programed firmware to my borad by MDK-arm, the ble name changed to "DFU-TARG"，it seems startup with "bootloader" mode.

How to fix it ?

Thanks a lot.

RE: nRF52840 BLE DFU (OTA ) example

Amanda Hsieh — Wed, 09 Dec 2020 12:51:23 GMT

Hi Pony,

Please see the

Example: BLE Secure DFU Bootloader, Buttonless DFU Template Application

Toturial: getting-started-with-nordics-secure-dfu-bootloader

-Amanda H.