Thanks for the answer. Could you explain how to flash this sonoff? I’m having problems getting always “unhandled exception” or “invalid head of packet” erros. With the same serial i’m able to flash other sonoff devices and ESP without any problem. My serial adapter have a cp2102 chip, so i don’t think the problem is the serial adapter.
I’ve tried with pair button always pushed, pushed for a while and then released, wituout pushing the button… without succesful