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INDI Library v2.0.6 is Released (02 Feb 2024)

Bi-monthly release with minor bug fixes and improvements

I need a CEM120 mentor.

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I would like to connect my linux machine (NanpPC T4) to the CEM120, and then connect my MacBook to the Linux NanoPC to control everything.
I tried a simple USB connection from the mount to the Linux machine running KStars. But EKOS wouldn't connect to the mount. I assume that using USB then the connection type is SERIAL?
I tried that, and it wouldn't connect.

I then tried switching to an RS232 cable and connecting it to the R232 port on the mount. I used an RS232/USB adapter, which works well on my other mount, This too failed on the CEM120.

I then tried connecting via a wired Ethernet connection. But I don't have a router out in the observatory, and a direct connection to my Linux machine didn't work either.

Any help would be GREATLY appreciated.

Peter
3 years 6 months ago #60513

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A direct USB connection from our GEM45 to Ekos works very well. Which version of KStars did you use? Which driver did you use? Please post debug logs.
3 years 6 months ago #60514

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Have you verified that the port (ttyUSB?), as well as the connection baud rate (115200), are correct? Driver should be indi_ioptronv3_telescope...
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3 years 6 months ago #60552

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So we do not use the one labeled "iOptron CEM120"?
I will try the V3 version you mentioned above.
3 years 6 months ago #60564

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If you hover over the "iOptron CEM120" driver in the drop down list in the profile editor, you'll see that it is the same driver. So, debug logs?
3 years 6 months ago #60566

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Thanks. Yup, that's one I was using. I looked at the logs and all I saw was time-out errors. I'll try agin today and send the logs.
3 years 6 months ago #60568

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Replied by Paul Muller on topic I need a CEM120 mentor.

I'll second @wvreeven's suggestion that baud rate might be the problem - also do you have search for devices enabled?

Final thought, try starting with just that device connected to ensure you're not chasing an interoperability problem (its unlikely to be the problem, but there's no point in solving a complex problem when you can solve a simple one first)
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3 years 6 months ago #60590

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WooHoo! I got it all working!
I still need to adjust the Dome settings, but the mount works via USB. It may have been the baud rate as suggested here!
Thanks all! My mount is no longer a $7,000 paperweight!
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3 years 6 months ago #60596

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Replied by Paul Muller on topic I need a CEM120 mentor.

Glad to hear it! BUT remember the first rule of astronomy club, we talk don't about how much our equipment ACTUALLY cost us in public forums just in case our partners find out! ;-)

"no really, this guy sold it to me for $100, I couldn't believe it EITHER, besides, the kids don't REALLY need new clothes those old ones fit them just fine"
3 years 6 months ago #60597

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So what baud rate did you end up with? The driver in GIT has this:
// Baud rates.
    // 230400 for 120
    // 115000 for 70
    if (strstr(getDeviceName(), "120"))
        serialConnection->setDefaultBaudRate(Connection::Serial::B_230400);
    else if (strstr(getDeviceName(), "70"))
        serialConnection->setDefaultBaudRate(Connection::Serial::B_115200);

So it should be 230400 selected by default for CEM120
3 years 6 months ago #60605

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In such the case I would suggest to write a letter to a partner, put it in sealed envelope and write on the envelope "Open only after I'm gone!"
The letter should say "Honey, DO NOT sell my astronomy equipment for the the price I told you I had paid for it"
:) :) :)
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3 years 6 months ago #60609

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Replied by Paul Muller on topic I need a CEM120 mentor.

Hilarious! Too funny and probably true.
3 years 6 months ago #60638

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