Some USB devices with the requirement of stable power have an extra powerplug mounted, I assume yours doesn't?
This device doesn't require
stable/constant power. But for my uses I'd like it to remain constantly powered.
It's a multi-purpose device which can run various applications. If it loses power momentarily then it will reset to the "application select screen" and require physical interaction to select and launch the correct app. Even if there's only one app installed. So even though I can program the RPi to automatically start up and resume operations after a reboot, the fact that the USB device loses power means I need to be physically at the device to get everything running properly again. But ideally I'd like to have this all tucked away in a dark corner somewhere I'll never have to physically access and just manage everything about it remotely.
And this issue seems to be specific to the RPi. If I have the USB device connected to a (Windows) laptop and reboot the laptop, the USB device remains powered.
Or alternatively to my Y-cable idea, maybe someone knows a setting I can tweak in Linux so that it keeps power flowing to the USB ports during a reboot. That would also be an acceptable solution for this issue.
Would a powered hub do the trick?
- RPi <--> powered hub <--> device
I hadn't considered that. It just may work!
Though I'd hate to spend the money buying one only to find out it didn't do what I wanted. . . If I can find one cheap enough then I may give it a go.
The Y-cable would have also done the trick, plug the power-only lead into another USB charger/outlet or a power bank.
That's another good idea. Thanks!
I do have a Y-cable and a USB charger/power bank I can try out.
Actually the Y-cables I have are for mini-USB connections and this device uses a micro-USB connection, so I don't have a usable cable after all.
I guess I need to look into getting a new Y-cable or a powered hub.
Thanks to everyone for their suggestions and help!