I have flashed an ESP8266 with the ESP8266 flash downloader that said my flashing had succeeded.
But when I sent an AT command from the serial monitor it didn't respond and the TX/RX LED from the ESP8266 didn't respond either. I checked all baudrates from 300-200000, but nothing.
I was using CH340 USB to TTL for flashing wired like this:
USB -> ESP8266 3,3v ->CH_PD and VCC GND -> GND and GPI0 (only when flashing) TX -> RX RX -> TX
I was flashing to downgrade the firmware; the default firmware from shop was SDK 1.5.4, AT VERSION 18.104.22.168.
I have been frustrated with this, because this is my second module.