Åke Liljenberg
Åke Liljenberg created a new topic ' Loses connection with iOptron CEM40 after meridian flip' in the forum. 2 years ago

Hi,
Not after every night but often enough I wake up to find that I lost half of the night's lights due to lost connection with the iOptron mount right after the meridian flip.
Unfortunately I don't have a verbose log, but perhaps the below can help?
It started to behave like this after the latest software update. I'm currently on Stellarmate SM-110 Version 1.7.2.

[2022-09-05T02:44:36.601 CEST INFO ][ org.kde.kstars.indi] - ZWO CCD ASI2600MC Pro : "[INFO] Taking a 300 seconds frame... "
[2022-09-05T02:45:33.340 CEST INFO ][ org.kde.kstars.ekos.mount] - "Meridian flip waiting."
[2022-09-05T02:49:37.707 CEST INFO ][ org.kde.kstars.indi] - ZWO CCD ASI2600MC Pro : "[INFO] Exposure done, downloading image... "
[2022-09-05T02:49:37.766 CEST INFO ][ org.kde.kstars.indi] - ZWO CCD ASI2600MC Pro : "[INFO] Download complete. "
[2022-09-05T02:49:38.190 CEST INFO ][ org.kde.kstars.indi] - "FITS" file saved to "/home/stellarmate/Pictures/Light/Light_058.fits"
[2022-09-05T02:49:38.712 CEST INFO ][ org.kde.kstars.ekos.capture] - "Download Time: 0.71 s, New Download Time Estimate: 0.68 s."
[2022-09-05T02:49:39.480 CEST INFO ][ org.kde.kstars.ekos.capture] - "Received image 29 out of 65."
[2022-09-05T02:49:39.488 CEST INFO ][ org.kde.kstars.ekos.capture] - "Captured /home/stellarmate/Pictures/Light/Light_058.fits"
[2022-09-05T02:49:39.669 CEST INFO ][ org.kde.kstars.ekos.mount] - Meridian flip: slewing to RA= "00h 22m 58s" DEC= " 61° 48' 56\"" Hour Angle "00h 00m 41s"
[2022-09-05T02:49:39.669 CEST INFO ][ org.kde.kstars.ekos.mount] - "Meridian flip started."
[2022-09-05T02:49:39.700 CEST INFO ][ org.kde.kstars.ekos.guide] - "Autoguiding aborted."
[2022-09-05T02:49:39.728 CEST INFO ][ org.kde.kstars.ekos.align] - Target updated to JNow RA: "00h 22m 58s" DE: " 61° 48' 56\""
[2022-09-05T02:49:39.733 CEST INFO ][ org.kde.kstars.ekos.mount] - "Meridian flip slew started..."
[2022-09-05T02:49:39.842 CEST INFO ][ org.kde.kstars.indi] - iOptron CEM40 : "[INFO] Slewing to RA: 0:22:58 - DEC: 61:48:56 "
[2022-09-05T02:49:40.572 CEST INFO ][ org.kde.kstars.ekos.guide] - "Mount is moving. Resetting calibration..."
[2022-09-05T02:49:40.588 CEST INFO ][ org.kde.kstars.ekos.guide] - "Calibration is cleared."
[2022-09-05T02:50:13.810 CEST INFO ][ org.kde.kstars.indi] - iOptron CEM40 : "[ERROR] bool IOPv3::Driver::getCoords(double*, double*, IOPv3::IOP_PIER_STATE*, IOPv3::IOP_CW_STATE*): Expected 20 bytes but received 0. "
[2022-09-05T02:50:14.814 CEST INFO ][ org.kde.kstars.indi] - iOptron CEM40 : "[ERROR] Write Command Error: Write Error: Input/output error "
[2022-09-05T02:50:14.819 CEST INFO ][ org.kde.kstars.indi] - iOptron CEM40 : "[ERROR] Write Command Error: Write Error: Input/output error "
...
And the "Write Error" continues forever.

Any ideas? Since I ran out of ideas I'm planning on trying to control the mount through the HBX connector instead of through USB, what do you think, could that be more stable?

Cheers,
// Åke

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