I use 2 of
these to control my rig from inside. Fortunate that the rig is within about 12metres away, however I think you can chain two or more. One to a 4 port unpowered hub (guider, mount, focus control, DSLR sometimes), the other straight to my QHY9. Don't like leaving the lappy outside. Can run the lappy downstairs by VNC from desktop upstairs when I'm really being lazy.
Very reliable.