Astroberry Focuser driver is part of Astroberry-DIY project. It is available on GitHub and needs to be compiled from sources. No binary packages are provided for installation via apt-get.
Astroberry Focuser is an Open Source Software. It provides a stepper motor driver for Raspberry Pi with absolute and relative position capabilities.
There are no known bugs for this driver. If you found a bug, please report it at GitHub.