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Update to esptool-2.7 released on 19-07-18
Changelog for esp8266 from v2.6:
Features
write_flash --flash-size keep
will keep whatever flash size is set in the bootloader header, matching the behaviour of--flash-mode keep
and--flash-speed keep
. The default is still--flash-size detect
but may be changed to keep in a future major update, to be consistent with the other two options.write_flash
no longer updates the flash header if the file being written to the bootloader offset isn't a valid image file for the chip. This is useful for flashing pre-encrypted data to ESP32s, where the image file contains ciphertext.Bug Fixes/Changes
elf2image --sha256-offset
will now only write the ELF SHA-256 to this offset if the existing data is all zeroes. Otherwise a warning is printed.