Recovering a bricked Artillery 3D printer

These steps recovered a bricked Artillery Genius 3D printer, which was bricked due to leaving the TFT attached during a USB firmware upload.

The symptoms were unable to connect in Cura, firmware update buttons greyed out, and LED blinking in repeating double blink pattern.

This is for the 8-bit models, 32-bit probably requires different steps.

1. Purchase a USBasp
   • Ideally one that comes with the small 6 pin connection/cable
   • New stock preferred, forum posts from 2016 suggest incompatible with ATmega2560, appears to no longer be the case
2. Unplug printer, connect 6 pin cable between printer and USBasp, connect USBasp to PC
3. Using Zadig, install libusbK on the USBasp device (select USBasp in top dropdown, click little arrows until libusbK selected, install)
4. Open Arduino IDE
5. In Tools menu:
   • Board and Processor: ATmega2560
   • Programmer: USBasp
   • Burn bootloader
6. Unplug USBasp and connect normal USB connection to printer
7. Open a command prompt in the same folder as your firmware file, and run this, replacing ArtilleryGenius_1.1.9_Advanced.hex (keeping the surrounding flash:w: and :i) with the filename of your firmware and COM3 with the correct USB serial port of your printer:

   "C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avrdude" -C "C:\Program Files (x86)\Arduino\hardware\tools\avr/etc/avrdude.conf" -v -p atmega2560 -c wiring -P COM3 -b 115200 -D -U flash:w:ArtilleryGenius_1.1.9_Advanced.hex:i