Here we can see a short summary of the system:
The Ardufocuser Controller is connected to Telescope CCD and Focuser, on the other hand in Raspberry Pi the INDI Server with specific Ardofocuser INDI Driver.
It allows a remote control by TCP/IP socket. We can conected to the INDI Server through INDI Cliente (Desktop, Mobile Apps o Web Apps).
Also in the Raspberry Pi, will be an algorithms that provide automatic focus "Automatic Start Focus" and "Automatic Planet Focus".