AGNOS

AGNOS is the Ubuntu-based operating system for your comma three devkit.

Fastboot

In order to put your device into fastboot mode:

Connect power to the OBD-C port.
Then, quickly connect the comma three to your computer using the USB-C port.
After a few seconds, the device should indicate it's in fastboot mode and show its serial number.

Flashing

Put your comma three in fastboot mode.
Run ./download.py
Run flash.sh for Linux and macOS or flash.ps1 for Windows