rab wrote:If your device has 2mb or more of flash you can just use big flash mode and you only need to link one image. Although linking two different images isn't difficult. I don't see anything else in your list of requirements that it doesn't do already.
How does it work then? Espressif isn't exactly very forthcoming with useful details (and yes, I know the OTA Flash document).
All my devices have 4 mbit flash, of which almost half is used for the image (276 kbyte netto left).