I have found an image (build v1.3.0.2 AT version 0.40.0) which I can program and runs fine in my WiFi board for the Electron. So the main problem is solved but still I don't understand why it not just a matter of reading the contents of a known working module and copy it to another module while the ...

AFAIK I am reading from 0x000000,
Please note there is a 0 between the read_flash and 0x100000 and that is the address, 0x100000 is the length of the data to read.

Thank you for this hint. I am now able to see what the module is telling me: ets Jan 8 2013,rst cause:2, boot mode:(3,6) load 0x40100000, len 1856, room 16 tail 0 chksum 0x63 load 0x3ffe8000, len 776, room 8 tail 0 chksum 0x02 load 0x3ffe8310, len 552, room 8 tail 0 chksum 0x79 csum 0x79 2nd boot ve...

Hi, I am using the ESP-01 modules for a WiFi board on my Acorn Electron, Atom, BBC Micro and System series. Up until recently, all the modules I bought worked fine but the last batch I bought has a different firmware. They report AT Version 0.21.0.0 and they often crash because of a software watchdo...