I use an Atik 383L+ and one thing I noticed is that the camera must have power before you start the indi server. Otherwise the driver never starts up and clients cannot connect.
Basically this means you cant have an indi driven power switcher (relays) in the same indi server because switching on the power after indi-server starts is too late.
I have startup scripts that power on all devices before I start the indi server.
Derek