Flashing: Windows - kad/Marlin GitHub Wiki

Install USB-Serial drivers for your printer, if needed.

• CH340 Windows vendor driver available from here

Install avrdude: https://download.savannah.gnu.org/releases/avrdude/avrdude-6.3-mingw32.zip

• If you don't understand how to install it, watch this video, 2 min or this video for older Windows
• You may need to install also libsub-win32

Using avrdude:

avrdude -v -p atmega1284p -c arduino -b 115200 -D -P COMx -U flash:w:Anycubic-Mega-Zero-firmware.hex:i

Notes:

• Replace COMx with your actual COM port where printer is attached
• Replace Anycubic-Mega-Zero-firmware.hex if you have different firmware filename

Alternatively, it is possible to use GUI wrapper for avrdude - AVRDUDESS. See below screenshot as example of usage: