Hi
I see you have an EqStar Pro, I just got mine the other day and the only way I have been able to connect to is using the Snyscan app on IOS. I am having no luck getting the astroberry to connect to the serial port. 
For you issue I had the same problem with the bressor exos2 goto system. I found a custom driver that worked but the sewing was all wrong.  
www.cloudynights.com/topic/775652-bresse...perly/#entry11244944
 

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