Raspberry Pi runs Linux based operating system.
Our spacedesk Driver only supports Windows 7/8.1/10 (32/64-bit) operating system.
If your Raspberry Pi runs Linux, then you cannot use it as primary machine for spacedesk.
On the other hand, Windows 10 embedded operating system can be installed on a Raspberry Pi but the next requirement will be the processor. If it's an ARM processor then you still cannot use it as primary machine. spacedesk driver does not support ARM processors.
If your Raspberry Pi fits all the system requirements of spacedesk Driver, we still cannot guarantee that it will work. We never tested our driver on this kind of platform.
For details, please refer to the system requirements of spacedesk in our website or user manual.