I have used an iOptron HEA69C mount for about two months now on both ASIAIR and NINA. The mount operates with no issues on NINA and PHD using the ASCOM driver. It actually is a joy to use and guiding has been consistently in the 0.5 arc-sec range.
However, the ASIAIR support has issues and is not stable. Using the latest FW update the mount is not found on my ASIAIR Pro direct connect or using a powered USB hub. The mount does connect to the ASIAIR Plus at 115200 baud rate and selecting the CEM40/GEM45/HEA43 210101+ option.
This is not stable. The ASIAIR always connects but sometimes does not do guiding, it won’t complete a calibration and spins on the clearing backlash step. It requires a full power cycle to get it to work. You must have the mount cable connected and powered up before you power on the ASIAIR to have a reliable start up.
Once it is happy (usually at least one power cycle) it works fine and has the same guiding performance as found in PHD2 and NINA. It is a little qwerky as sometime it waits a couple of seconds before it moves the mount when commanding a goto. In NINA there is no delay. PHD2 calibrations are fast and complete with no issues. Last night the ASIAIR did complete a meridian flip with no issue, recalibrated guiding, and continued the auto run. I would not trust it for a complete unattended operation at this time. I need to test it a little more to have confidence.
When using the ASIAIR and SkySafari both connected it has considerable delays and slows down the response of the ASIAIR app to any button push commands and SkySafari is a little sluggish, If you disconnect SkySafari the ASIAIR app works fine.
Using, Carte du Ceil, PHD2, ASTAP, and NINA under ASCOM everything’s just works and is very reliable on start up and all night during the astrophotography session.
-Jason.
