>> Perhaps my mistake was not having connected the mount to a USB port of asiair pro using the RS cable. I will try that.
You actually did the right thing, Ant贸nio.
When you select "On-Camera-ST4" in the Telescope Setup, the ASIAIR does not communicate directly with the mount. Any cable between the ASIAIR and the mount is ignored. With ST4, you lose the ability to control other functions on the mount -- you can only guide.
When guiding using ST4 cable, the ASIAIR sends correction commands to the Guide Camera's USB interface.
The Guide camera then translates the commands into the RA+, RA-, DEC+, DEC- contact pulses on the ST4 cable. That is why for ST4 guiding, you simply connect the ST4 cable between the guide camera and the mount's ST4 interface. The ASIAIR talks to the Guide Camera, and the Guide Camera talks to your mount.
(The "ST-4" refers to the original SBIG ST-4 camera, by the way.)
It is a mystery to me why after selecting and opening (green slide button) the Guide Camera, ASIAIR still tells you there is no guide camera for it to send ST4 signals through.
I don't know what else you have connected to the ASIAIR USB ports. Perhaps you can remove all connectors (including main camera) and try again, as a test to see if there is something interfering with the guiding interface.
I just tried connecting nothing but an ASI290MM-mini to the ASIAIR, and the ASIAIR app on iOS still lets me select the Guide button in the Preview window, and lets me enter the guide window when I tap on the floating guide graph, and even lets me start the guide camera, even though it is indoors and I have the guide scope covered. I even tried connecting a second camera that also has an ST4 port (ASI174MM Mini) as the Main Camera, and that situation also still works.
The only thing I can think of now is that somehow the ASIAIR does not think that your ASI290MM-Mini has an ST4 port.
est regards,
Chen
