ESP8266 Community Forum

I am trying to flash custom firmware build and downloaded from https://nodemcu-build.com/, using PyFlasher by Marcel Stör. I am using Lolin NodeMCU V3.
Problem is PyFlasher get stuck after a few lines in console. I waited for hour but nothing happens.
I tried changing the USB port of laptop the NodeMCU is connected, changed cable, changed baud rates, tried both options “Erase Flash” from ‘yes’ and ‘no’, but no success.
How to get out of this?

I get this when try to erase using pytool.

The PyFlasher is just a GUI on top of esptool.py. I see you already created https://github.com/espressif/esptool/issues/359

My NodeMCU dev kit has some hardware problem (so I guess as exactly same kind of dev kit is working fine.).