This step is only needed because no custom firmware is available yet.

You can use the latest Bear Calibration firmware or the latest stock Prusa firmware.

Download gcode files using this link: https://github.com/gregsaun/bear_extrude...

Copy the following files to your SD card

bear_hemera_config_mk*.gcode (choose the version corresponding to your printer)

This file is used only once to configure your printer to use the Bear Hemera. You can reset this configuration anytime by running the reset_to_prusa_mk*.gcode

unload_filament_hemera.gcode

You have to use this file every time you want to unload filament from your Hemera. It is needed because the filament path is much shorter than Prusa extruder.