Swizerlan Since this is the case, it would be better if you could daisy chain a second Asi Air Pro to the main Asi Air Pro via USB
Yes, syncing two ASIAIRs is the best solution for everyone.
1) it does not burden anybody who don't ever want to use a second camera, 2) ZWO sells more ASIAIR units, 3) you can concurrently also control two different focusers and two different color wheels and 4) there is no performance hit to those who do want to add a parallel set up -- you don't have to worry about the memory bandwidth when both cameras are trying to write to their storage, or sending previews to to different iPads, even.
All that has to happen is passing some semaphores between the two ASIAIR to synchronize mainly the dithering (delay dithering if second camera is still capturing), and delay capturing on second camera while first camera has started dithering). The ASIAIR with the guide camera (thus dithering ASIAIR) is the master. This kind of locking has to already be happening between the main camera and the guide camera threads today (I can't imaging modern software to share the same thread for the main and guide cameras), so the extra code needed for a second ASIAIR is child's play (for a child in the Silicon Valley).
The LAN (Ethernet) connection is probably better for passing semaphores since the v2 ASIAIR is so flakey with WiFi. Furthermore, if you are already using a LAN connection to connect to a WiFi extender, or a mesh router, or to the home router through a long cable, all the user has to add is an Ethernet switch and the second ASIAIR is connected to the same established network.
But WiFi could work too if the two ASIAIR are within a foot or two of each other when the neighborhood is crowded with WiFi signals. WiFi connection problem (as with any radio communication) is not signal strength, but signal to noise ratio -- where your neighbors' routers are noise to your own WiFi connection -- this is why some people don't have problems, while most people in the cities and crowded suburbs have terrible problems with their ASIAIR WiFi.
Chen
