Hi Doug. Thanks for the comment. My only goal is be remotelly control the whole system (mount + imaging) using Kstars/ Ekos. I'm not an engineer and have limited understanding about how to acheived it.
From recent exchanges with Gary Myers / StellarCAT it seams that the ServoCAT is sending GoTo requests to the AN when this late is in 'CATALOG' / 'PLANETARIUM'. So I deduce that the AN should remain necessary and that Ekos should talk to the ServoCAT.
Didier

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