dmaxben wrote: ↑

Wed Nov 25, 2020 1:51 pm

Did you try holding the EN/reset button, then do idf.py erase-flash....then when it starts trying to connect, release the EN/reset button?

Thank you very much. I've already solved the issue. I just pressed the button but holding it was required.

Firmware flashed OK and the board is operational.

I tried to flash ESP-AT firmware and during flash startup accidentally pressed twice EN button: python.exe -m esptool --chip auto --port "COM4" --baud 115200 --before default_reset --a fter hard_reset write_flash -z --flash_mode dio --flash_freq 40m --flash_size 4MB 0x8000 partiti on_table/partition...