Support for .bin.gz images about espbuddy

[soif]

Hi @TD-er

Happy that you've finally tested EspBuddy ;-)

I'm not sure to fully understand your request...

What would you like that I change in EspBuddy?

Adding the ability to use another minimalOtaFirstStep.bin.gz instead of the current one (firmwares/ESPEasyUploader.OTA.1m128.esp8266.bin)? right?

[TD-er]

Well the 2-step OTA build must be based on the latest core version.
Then it supports to flash compressed bin files.
This also means the 2-step OTA build can be compressed if used to upgrade a node running core 2.7.0
So the added size of the newer core can be compensated by compressing it.

This also makes it slightly more complex to determine the max. size of a bin file, as the total sketch space must be able to hold an uncompressed file + the other in compressed form.

• (new.bin + 2-step.bin.gz) < total
• (2-step.bin + new.bin.gz) < total

I have not yet tested the entire ESP-buddy system myself, but I was thinking you've been working on it for a while so you will have a much better understanding of what's needed here and I do like the concept of assisted web backend for deployment.
And by using your 2-step OTA binary we also may help each other in further development.

For example something I think may also be possible in the future is to patch or upgrade settings or maybe even switch file systems (SPIFFS => LittleFS) which would otherwise be a very cumbersome exercise.