DFU over the air upgrades

[Jerry Easley]

I want to add a service to my application that will, over the air, download and reprogram the flash on a nRF52480_dongle.  I have spent hours reading various snippets of documentation I suspect much of it is out of date and the bits that seemed current didn't mak a lick of sense to me.

I want to do something like this:

Write a bluetooth program on my PC  that will broadcast firmware images to one or more nRF52840_dongles.

Add a service to a nRF52840 application that will accept the broadcasted firmware and reprogram the flash on the nRF52480_dpngle..

I do not want to use a "soft device", what ever that is.

Regards,

Jerry

[Priyanka]

Hi Jerry,

Have you taken a look at the Adding DFU support guide? You can try to use mcumgr on your PC to do the DFU.

But do note that The mcumgr command-line tool only works with Bluetooth Low Energy (BLE) on Linux and macOS. On Windows there is no support for Device Firmware Upgrade over BLE yet.

Best Regards,

Priyanka

[Jerry Easley]

Hi Priyanka,

I apologize for my tardy reply; we had a holiday here and I had some hardware issues I had to attend to.

I think what you have recommend above is exactly what I am looking for! Thank you so much!

Regards,

Jerry

[Jerry Easley]

I tried to follow the instructions in the article you provided, but, soon became confused. The author instructs you to make a few modifications to the main.c file.  In particular inustructs me to insert a couple of lines right before "

• Lastly, add these lines right before bt_conn_cb_register "

This does not exist in the sample shipped with the SDK,  Apparently he is referencing a sample on github. Shoud I clone the gethub sample and work on that?

At the end he confusingly says:

"If you've followed the above steps correctly, the sample should look like this: https://github.com/simon-iversen/sdk-nrf/tree/ble_dfu_peripheral_lbs/samples/bluetooth/peripheral_lbs "

But that seems to be the very project he instructs us to modify????

I think I should clone the project from github and the make the modifications to that; is that correct?

Regards,

Jerry

[Jerry Easley]

I cloned the sdk_nrf from github and indeed it contains the sample I want.  However i can't figure out how to tell SDK_CoONNeCT_Extensions where to load the application template from. It won't even load it if I type in the complete path and file file name.  Why does Nordic make even this most simple of tasks so incredibly difficult?

Regards,

Jerry

[Jerry Easley]

I gave up trying to supply the project as a template and just copied the project into my workspace and opened it up under nRF_CONNECT_EXTENSION.  I then added a build configuration for a nRF52840Dongle.  When I attempted a build on the unmodified project, it ended in error;

"c:\Nordic\MyApps\dfu_peripheral_lbs\src\main.c:11:10: fatal error: sys/printk.h: No such file or directory
11 | #include <sys/printk.h>
| ^~~~~~~~~~~~~~
compilation terminated."

Apparently, the sample from github is not compatible with the nRF_CONNECT_EXTENSION environment.

I am dead in the water and await your assistance.

Regards,

Jerry