Viktar Hushchynski

I had the same issue with the photos from DJI Fly app. Checked it on the phone and it is regular JPEG:  And in the server logs: ``` [Nest]...

Did more research on the topic: - Information on Zephyr DFU [here](https://devzone.nordicsemi.com/f/nordic-q-a/100061/dfu-in-zephyr-nsc-2-3-0) with links to [FOTA](https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/device_guides/working_with_nrf/nrf52/developing.html#fota-updates) and the [guide](https://devzone.nordicsemi.com/guides/nrf-connect-sdk-guides/b/software/posts/ncs-dfu)

Initial firmware version has similar implementation. You could take a look [here](https://github.com/BasedHardware/Friend/commit/d23ed14e8d8e08c9ca08305679feb601f864c998) (should be in a deleted file). You will find there usage of LEDs and IMU. Regard battery service...