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INDI Library v1.9.8 Released (29 Sep 2022)

Bi-monthly INDI Library released with new drivers and bug fixes.

CEM120 connectivity problems "Read Command Error; Timeout error"

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Hi Community,

I have a problem with my Ioptron CEM120EC mount.
After months of good operation, I now have connectivity problems between my Pi and the mount.

Shortly after starting the driver and connecting to the mount I get the error message: 
[ERROR] Read Command Error: Timeout error. (see attached log files for the mount and indi).

The mount loses its bearings and the only way to get it moving again is to disconnect and then connect the driver again.

Problems started after a recent OS update (sudo apt update && sudo apt upgrade). Maybe it is related.

I connect the CEM120EC with my Pi4 through USB.

Interesting other detail: before the connectivity problems started I had to set the baud rate manually. It did not save with the driver defaults.
Since the connectivity problems started, the driver picks up the baud rate automatically.

Any suggestions what is the problem and how to fix it?

Best regards,

Marcel Noordman

 

File Attachment:

File Name: indi_ioptr...1-17.log
File Size:7 KB


 

File Attachment:

File Name: log_21-25-05.txt
File Size:85 KB
CEM120 - AP1200GTO - WO 71 Star - TEC140 - C8 - Atik383L - Atik EFW - Atik OAG - LX2 - Pi 3B & 4 - Astroberry distro
Last edit: 10 months 2 weeks ago by Marcel Noordman.
10 months 2 weeks ago #79581
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What baud-rate have you selected in the INDI connection settings? Could be worth changing it to test it out
Celestron C11 iOptron CEM120 Atik 383L
HP8300 Elite i5 running Xubuntu, Indi, Kstars & Ekos
Roll off roof observatory
Battling Irish weather
github.com/dokeeffe
twitter.com/BallyhouraStars
10 months 2 weeks ago #79592

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The USB port is correct and the baud rate as well.
Indi connects to the mount but after some initial interaction, the connection breaks.
Sometimes I can even unpark and slew 1-2 times before the connection is lost.
I need to then disconnect and connect the driver again to move the mount to the parking position.

M
CEM120 - AP1200GTO - WO 71 Star - TEC140 - C8 - Atik383L - Atik EFW - Atik OAG - LX2 - Pi 3B & 4 - Astroberry distro
10 months 2 weeks ago #79593

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That is strange alright. The only other suggestion I have is to clean the USB cable connectors with contact cleaner. If you live in a humid climate. I have had some strange things happen USB cables. Its rare but does happen.
If you can open a terminal and run dmesg you might see some log messages relating to serial/USB cable problems
Celestron C11 iOptron CEM120 Atik 383L
HP8300 Elite i5 running Xubuntu, Indi, Kstars & Ekos
Roll off roof observatory
Battling Irish weather
github.com/dokeeffe
twitter.com/BallyhouraStars
10 months 2 weeks ago #79600

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Thanks Derek, the dmesg suggestion was a good one.
I see the problem related to the following error message:

usb_serial_generic_read_bulk_callback - urb stopped: -32

Any suggestions what this is and how to solve it?

BR
CEM120 - AP1200GTO - WO 71 Star - TEC140 - C8 - Atik383L - Atik EFW - Atik OAG - LX2 - Pi 3B & 4 - Astroberry distro
10 months 2 weeks ago #79611

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