Download the Rover firmware (turtle.elf) from: https://github.com/TurtleRover/firmware-shield/releases
Connect to the Rover via ssh (IP: 10.0.0.1 | Login: pi | Password: raspberry).
and put the file into the Rover home directory.
Check if the file is available via console:
And wait until it ends flashing.
[image source: netflix.com]