Steve Cohen
Steve Cohen created a new topic ' Errors due to port instability' in the forum. 2 weeks ago

First night trying to use KStars/EKos on AstroArch 1.8 on new Pi5.

There seems to be great instability in the serial ports.

I am able to get everything connected to start. Then things quickly go bad.
Let's talk first just about the mount. Other issues may be similar, but let's just try one thing at a time.

Mount Connection params are as follows:

Screenshotfrom2024-04-1622-08-37.png


Connection is made successfully. Soon, though, errors start occurring of this sort:
[2024-04-16T21:06:40.773 MST INFO ][           org.kde.kstars.indi] - Celestron Advanced VX HC :  "[ERROR] Serial write error: Write Error: Input/output error "
[2024-04-16T21:06:40.779 MST INFO ][           org.kde.kstars.indi] - Celestron Advanced VX HC :  "[ERROR] Failed to read RA/DEC values. "

Investigating this I find that the command
ls /dev/ttyUSB*

returns only /dev/ttyUSB1, not /dev/ttyUSB0

If I go back and change the setting to connect at /dev/ttyUSB1,
it will connect successfully, then soon return similar errors.

Trying again the command
ls /dev/ttyUSB*

returns only /dev/ttyUSB0

It seems that something in the Pi or its OS is changing the USB ports available.

Can anyone hazard a guess as to why this might happen?

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