Make sure the system is up to date, and spi is enabled.
The user pi should be in groups gpio and spi.
You need python3 and git.
Clone this repo in pi's home directory.
Run pip3 install -r requirements.txt in this project's root.
Put the thorberry.service file in the /etc/systemd/system directory.
Then, sudo systemctl enable thorberry and sudo systemctl start thorberry.
Make sure everything is good with sudo systemctl status thorberry.