Good day: First post .... I am much more an amateur astronomer than I am a Linux programmer. My computer skills peaked with tweaking HIMEM under DOS 5.0 to get the most out of the 640K to 1M memory space on an IBM PC Jr., and has atrophied since then.

I obtained a Stellarmate and LX200 Autostar II serial to USB cable a few weeks ago, and finally had the chance to try it at my 12" LX200 ACF, which is at my dark sky vacation home a two hour drive away. It will not connect to the mount: Here are some of the details:

Desktop: 64bit Windows 10 machine, everything updated.
Using KSTARS to start EKOS.
SBIG ST10XME with CFW-10 (using SBIG driver) connects and seems to work flawlessly.

Every attempt to connect to the mount (Driver: indi_lx200gps, Version 2.0, Interface 5) fails. Serial port is enabled at 9600 baud (and I tested at every baud rate). The log reports the connection was good but the telescope fails the ACK check and wont' respond.

This behavior happens whether I run EKOS on the desktop, or use noVNC to run it on the Stellarmate. The CCD works fine, the connection to the mount is reported OK in the log, but the ACK check fails. I can connect to the mount from the desktop using my old setup of an RS232 connector and ASCOM drivers under Meade's Autostar Suite and controlling the telescope works fine, so the port (the RS232 port nearest the Handbox port on the control panel) is good. I used both the default /dev/ttyUSB0 port and then used the Stellarmate tool to assign a permanent /dev/mount alias which seemed to work fine, but has the same 'ACK' check fail issue.

Any suggestions?

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