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By martinayotte
#67912 you can create backup of the whole ESP using esptool.py, for example here, the 0x100000 argument is for the size of 1MB flash.

Code: Select allesptool.py --port /dev/ttyUSB0 read_flash 0x00000 0x100000 backup.bin


Then, you can reflash the other ESP :

Code: Select allesptool.py --port /dev/ttyUSB0 write_flash 0x00000 backup.bin