ESP8266 Community Forum

Bonjour ,

how to make backup actual firmware before upgrade ?

(chip ESP-01 )
AT+GMR
00150900

Thanks

I am not sure, but maybe esptool.py can do a dump.
now how good would that be I have no idea to be called a backup.

Generally speaking, with the SDK you can compile it again, or get a compiled already .bin file.
Unless you want the exact version that you have now, I don't know how to do it step by step.

it's still important
like with smartphone : before update , backup !
nobody to help me ?

You can directly read the flash. Desolder it first to be sure nothing interferes with reading it.

You can use a SPI flash programmer or the buspirate to read it.