Having this issue, too, with my iOptron HEM27. Right, I am in DST (Taiwan). As observed, it's about 2 days off. Firstly I thought my RTC was broken but nice to know it is a known issue.
Is there any workaround at this point? This is annoying as I have to set the date and time every time I am going to capture.

Lucian

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I had the same issue as the most of you guys. But after I set the gain to the maximum, shortened the exposure time, and set ASTAP as the plate-solver, the alignment went much faster and stable.

Lucian

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I recently got my new HEM27 with iPolar and encountered similar issue. As I know RPi itself has very limited current supplied for its alll USB ports. Before I got a "powered" USB hub, my USB devices that connect to my HEM27, then to RPi, were quite unstable on the connection. Then I noticed the message below in dmesg,
attempt power cycle
Cannot enable. Maybe the USB cable is bad?
That reminds me that RPi is weak on the USB ports. So I got a powered USB hub, then connected HEM27 USB that integrated all USB rigs. Now my RPi is quite stable to communicate all USB devices on my mount.

Lucian

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