

What QHY Drivers are you using - releases. What release of PHD2 were you using before?
Hi Han. The question is whether you are using the latest QHY camera drivers for your model camera. Those have to be separately downloaded and installed from the QHY web site. Sometimes the camera SDK we get from the vendor for use by PHD2 assumes that the latest camera drivers are also installed. I don’t know if that’s the case here, but it’s worth checking. You could also try the ASCOM driver to see if that works with the latest PHD2 release.
Good luck,
Bruce
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This is an error I get with the QHY5 ASCOM driver after maybe 20 minutes. The 30 seconds was selected to simulate guiding by locking on a hot pixel.

The pathname in the logged message isn’t relevant, it’s just a consequence of the PHD2 build system. What matters is the alert message, which describes what happened from the PHD2 perspective. This supports our earlier view, it’s a problem in the lower levels of the system – probably the camera driver or the camera itself but maybe a problem in the USB subsystem. The ASCOM “driver” isn’t a driver in the Windows sense, it’s an application that uses the native Windows drivers provided by the camera vendor. The trouble-shooting section of the PHD2 Help guide talks about ways to isolate USB and power-related problems if that’s where your problem lies.
Bruce
From: open-phd...@googlegroups.com [mailto:open-phd...@googlegroups.com] On Behalf Of Han K
Sent: Sunday, March 08, 2020 2:51
PM
To: Open PHD Guiding
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if the ASCOM driver is employed then the version of the QHY SDK that is used is the one in the ASCOM folder (Program files x86\Common Files\ASCOM\Camera), not the SDK version in the PHD folder.
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Only one of the developers could tell what has changed in v2.6.7.
Thanks for identifying the time range Han, but we need to see the *entire* debug log file, not just the snippet. We want to see whole context of the session.
Thanks!
Bruce
From:
open-phd...@googlegroups.com [mailto:open-phd...@googlegroups.com] On Behalf Of Han K
Sent: Monday, March 16, 2020 1:56
PM
To: Open PHD Guiding
Subject: Re: [open-phd-guiding]
Re: PHD2 2.6.7 unreliable with QHY5-II. Hangs on "waiting for
devices"
Hello Andy,
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I have done a test with a direct USB2.0 cable to the QHY5II instead of the 10 meter active USB3.0 cable + AS1600 hub. Same problem, no improvement.
Hi guys. The fix was released a few days ago in the dev1 development release: PHD2 will install that for you automatically if you choose to apply dev releases:

https://openphdguiding.org/development-snapshots/
Please let us know how it goes.
Bruce
From:
open-phd...@googlegroups.com [mailto:open-phd...@googlegroups.com] On Behalf Of Pierre D’Entremont
Sent: Thursday, April 02, 2020
6:55 PM
To: Open PHD Guiding
Subject: Re: [open-phd-guiding]
Re: PHD2 2.6.7 unreliable with QHY5-II. Hangs on "waiting for
devices"
I have the same issue. I too am waiting for the fix.
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Hi guys. The fix was released a few days ago in the dev1 development release: PHD2 will install that for you automatically if you choose to apply dev releases:
https://openphdguiding.org/development-snapshots/
Please let us know how it goes.
Bruce
From: open-phd...@googlegroups.com [mailto:open-phd...@googlegroups.com] On Behalf Of Pierre D’Entremont
Sent: Thursday, April 02, 2020 6:55 PM
To: Open PHD Guiding
Subject: Re: [open-phd-guiding] Re: PHD2 2.6.7 unreliable with QHY5-II. Hangs on "waiting for devices"
I have the same issue. I too am waiting for the fix.
On Wednesday, 1 April 2020 08:15:05 UTC-4, Simon d'Entremont wrote:
On Sunday, March 29, 2020 at 2:33:26 AM UTC-3, Andy Galasso wrote:Hi Han,
Thanks for the testing and I'm glad to hear that it is working. We'll get that fix into the forthcoming dev release. For now you can continue using the test version... it will be pretty much the same as the next dev version.
Andy
Thanks for this. I was in the same boat. Looking forward to the update.
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