WalterT 2021/06/17 02:06:56 "ZWO ASI294MM Pro" is Disconnected
OK, it looks like the root cause may be a camera problem, and not an automation problem, Walter.
(Debugging is often a matter of finding what is not wrong -- binary chopping -- until you are left wth what is wrong. :-)
Downloading an image is pretty stressful on the power supply. Perhaps you can check to make sure the power supply to the ASIAIR is in good order (voltage does not sag when more current is drawn -- could just be I-R losses from a corroding connector pin).
And of course it could be corroding pins in the USB connectors too. Make sure you get USB cables with documented wire gauge. They often come with 24 AWG or 28 AWG wires. Find one that at least has 22 AWG for the power pair in the USB cable. Use as short a USB cable as you need. Don't use a 2 meter cable when all you need is 0.5 meter to reach the camera.
I assume that you also have power connected directly to the camera, right? I would highly recommend not using any one of the ASIAIR's DC output ports; I leave mine all alone, and distribute power using independent power hubs -- main distribution using PowerPole hubs and sub-distribution using a 5.5mm/2.1mm DC hub from deepskydad. I use ASIAIR hardware as minimally as possible, just for what it is primarily intended for.
If the problem only happens indoors, and outdoors during the night, it may be loose connectors from the different camera orientation. Strain relief your cables; since the connectors on ZWO cameras are really poor. I can post come images of how I strain relieved my camera connectors, if you are curious.
Chen