Hi!

It has been a while since I read this forum so it is very well possible that this already has been reported. I did a quick search on the forum but didn't find anything which is why I decided to open a topic.

I am working on a custom motor system for my dobsonian telescopes and I use the LX200 protocol. I have it working with SkySafari and AstroPlanner (only simulator so far, no hardware yet) and started looking into getting it to work with INDI. This is how I discovered the small bug in the LX200 Basic INDI driver. The bug is that, when retrieving the telescope coordinates, RA and DEC are swapped. And only when retrieving, not when setting or when sending a slew command.

This leads to very funny but slightly annoying display issues, where the telescope seems to be pointing at a very different position than it really is. The interesting thing is that this only starts going wrong after an initial slew command is given. When INDI connects to the telescope, it first displays the telescope in the correct position. As soon as I give a slew command though, RA and DEC are swapped and the display of the telescope position is completely wrong.

This is visiible in KStars and Cartes du Ciel/SkyChart on macOS. I didn't test KStars on Linux since I currently don't have a Raspberry Pi with KStars installed.

Apart from this display issue everything seems to work well with this driver. No big issue but I thought you'd like to know.


Clear, dark and transparent skies, Wouter

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