Secure DFU support

[jussipo]

Found almost good (some fixes needed) python secure DFU app for sesame usage.
It works for me...
https://github.com/bringert/nrf5-ota-dfu-python.
decencies:
-intehex
-ptyprocess
-pexpect
and uses bluez's gatttool so that is a problem. But there is pygatlib..

So far not bleak based...I will try...

[meronepy]

Sorry for the delayed response. I’ve been quite busy with personal matters recently.

Thanks for the information. I’ll take a look at it when I have time.

DFU support is not on my immediate roadmap, but this could be useful as a reference if I decide to implement it in the future.