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Ответ от Aslan _[гуру]
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The UNI-T UT-D04 is a USB/HID cable for various UNI-T multimeters (and rebranded models) with PC connectivity.
There have been (at least) two versions of this cable, the older one with Hoitek HE2325U USB/HID chip, the newer one using a WCH CH9325 USB/HID chip.Aslan _Мудрец(17675)Посмотрите на , там вроде что-то есть про UT-D04:
When using any of the UT-D04 USB/HID cables you have to use the respective driver _without_ the '-ser' drivername suffix (internally all of these models are handled by the 'uni-t-dmm' driver). Since the UT-D04 cables are USB based (but don't use a USB-to-serial chip) there is no need to specify a serial port via 'conn', of course. However, the user running the frontend does also need to have permissions to access the respective USB device (see above). UNI-T UT-D04 cable issue on Linux The UNI-T UT-D04 cable with Hoitek HE2325U (or WCH CH9325) chip seems to have a very specific problem on Linux. Apparently it requires to be put into suspend (and woken up again) before it is usable. This seems to be a Linux-only issue, Windows is not affected by this since apparently the Windows kernel does this for every USB device, always.
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