Ron DeBry replied to the topic 'NUC10 vs RPI4b/SSD' in the forum. 1 hour 1 minute ago

Planning to acquire a mini-PC.

With an external usb wifi adapter, can one create a wifi hotspot for remote setups? Or should I get a travel router instead?

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I always seem to have enough time while the real image is taken/downloaded to make a mental note of the rotation I am trying to match. If your system is much faster than mine, maybe just tell it to take a 5 or 10 second exposure, just that once. Then go back to your normal setting while you use "Do Nothing" to adjust the rotation.

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I have had my mount Park at dawn twilight in the past, but it did not do so the last few sessions. If the job is set to repeat until stopped, is the preemptive shutdown checkbox needed to get the Park behavior back?
I seem to have had a couple of settings "wander" recently, including pre-twilight 'safety margin' getting set to 30 minutes, where in the past my jobs would continue until actual twilight.

Speaking of which, is there a use for having two separate settings that affect the same thing? If I set 'dawn offset' to +0.5 and (unbeknownst to me until I looked) the 'safety margin' at 30 minutes, capture is aborted at the start of twilight, even though the Scheduler screen shows capture should continue until 30 minutes beyond the start of twilight.

If there really is a need for both settings, can the scheduler read both and correctly report the actual end time?

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Glad you figured it out. My CEM40 had the same behavior - Park was unpredictable until I set a new Park position just nudged a bit away from the iOptron Home position.

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I understand wanting to use the internal guider, but trying PHD2 would be a great experiment. If the problem persists with PHD2 that would point in the direction of a mechanical/electrical connection issue. If PHD2 guides without the 'SNR goes to zero' phenomenon, that would suggest a bug in Ekos.

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Thanks, Nigel
I will look into that. Hopefully wlan0 and wlan1 are assigned consistently at boot.

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I use an external usb wifi adapter. For ages I was able to always have the external adapter connect to my home wifi, while the internal wifi ran the astroberry hotspot. (I find it useful to have both, in case I need to troubleshoot something).

In the past couple of months, however, the adapters get assigned differently at bootup sometimes. I have to stop and check which is which, change the interfaces' priorities if needed and reboot (hoping, of course, the adapters don't flip-flop again). This is not associated with changing which port things are plugged in to, as far as I know.

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Interesting. As I understand, the primary thing learned by calibration is "how far does the mount move per second of guide pulse?". Why would crossing the meridian change that?. It does change as you move to different declinations, but the software calculates that effect.

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Hi Mike,

It looks to me like that 2nd calibration failed in some way. The mount appears to have not moved at all during the first West step and it winds up thinking that the RA only moves at 1.7 arcsec/second. So, when it sends a correction to the RA that correction is way larger than really necessary. So it overshoots, then overcorrects in the other direction and you are off to the races.

Why the new calibration after the flip? Are you using ST4 for guiding?

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Do you have a screenshot (or log) to share? "Crazy oscillations" could have many different causes. Max's were quite specific - for some reason (maybe usb related?) the guide algorithm lost the ability to lock onto the star (SNR went to zero).

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Hmmm. I just looked more closely at the first screenshot. There are obviously stars, and the guider is locked on, yet the Guide SNR is reported as zero.

That's really weird. But I think it points in the direction of a software problem, not a mount problem.

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Notice that each instance of "going crazy" corresponds to a moment when the guide star snr crashes to zero. My guess? Clouds (or tree branches, etc).

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