system_upgrade_start : Improved error handling

[Thorvald]

Hi

I have been working on a custom upgrade over the air, and used some time to figure out what the problem was, when it did not Work.

Is it possible to get better messages from the system_upgrade_start, as it would help a lot in error situations ?

I can see if the download Works the Progress is printed, so just printing the called URL- and the http-response code would be a great help.

One of my mistakes was trying to do the update without being connected to the internet, so putting that kind of check in would also be nice.

Best regards
Thorvald