I recently had a issue where I couldn’t connect my Pmc8 mount to the asi air plus. My mount being the exos 2gt and I wanted to share how I fixed it. First you need to make sure the cable is in the serial mode which you can do with the ascom drivers and such also there are tons or guides with more detail on how to do it. It is very simple. After you do that and plug it in the right way it might work but if it doesn’t which it didn’t in my case in the asi air app where you go to connect the mount you need to change the baud from the default 9600 I believe it is to 115200 this immediately fixed my issue and I hope it fixes yours if your having the same trouble.