2 pc skärmar plus telefon skärm

Troubleshooting Network Connection and Secondary Machine
Network connection test
"Ping test on Windows desktop/laptop
If spacedesk cannot plug the Virtual Display Monitor try to ping test the IP address of
another machine to verify if it is reachable across the local network.
A ping test is done to confirm if the machine is successfully connected to a network.
Using the Command prompt, type “ping 192.168.x.x”,and check if it will get a reply
from the other machine that will indicate that it is also connected to a same network."

"Ping test on Android and iOS device
To do ping test on any Android or iOS device, just download any terminal emulator
application on Playstore or App store, then try to ping the IP address of the Windows
primary machine.
For example, on Android device, just download and install Android Terminal Emulator
app from Playstore, then open the terminal and type the command: “ping -c4
192.168.x.x”, -c stands for counter and 4 being the number of times of ping. Then
check if it will get a reply from the primary machine that will verify that both primary
and secondary are connected on the same network and reachable to each other."

Källa:
spacedesk