This firmware is for the original ratgdo v2.5x series boards only.
HomeKit firmware for the ratgdo32 and ratgdo32-disco series boards can be found here.
If you want to use ESPHome with Home Assistant instead of HomeKit, check out the ESPHome port.
For a comparison of available features for the different firmware options, please refer to the feature comparison matrix.
If you can't connect to your ratgdo board make sure you have the right driver installed for the type of board you have.
The setup process may take as long as a full minute, so please be patient.