Recovering a bricked nRF52840 dongle

[AndyM]

Hi

I have an nRF52840 dongle in bootloader mode (red LED blinks) but I cannot load any .hex or .zip files - the "Write" button is disabled

See screenshot are below

Any ideas how to fix?

Is it possible to load a Zephyr app on the dongle ? It prompts for a SoftDevice - which one should be chosen for a Zephyr app (SDK 2.6.1) ?

Thanks

[AndyM]

Update

The problem was that I did not have my app built for nrf52840 dongle

Once I built for that target the "Write" button became enabled and I was able to load it on the dongle. This time it did not ask me for the SoftDevice.

Another problem. I don't think my app is running. It enables BT advertising but I don't see it in nRF connect mobile app.

Any ideas?

Thank you

[AndyM]

Update 2

I built  the peripheral_lbs sample for the nRF25840 dongle was able to load it and  it runs just fine.So whatever issues I was having are related to the app I was trying to load. This ticket can be closed
Thank you