Switch for connecting/disconnecting USB *data*, not only power. Does such a thing exist? | Home Assistant | Page 1

little grove Oct 21, 2024, 10:34 PM

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I want to be able to connect and disconnect the USB connection to my 3D printer alongside automating the main power, but I can't seem to find any such product that achieves this? I'm in the UK.

fossil lintel Oct 28, 2024, 1:55 PM

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How about combining an AC powered hub with a smart plug?

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Or one of those hubs that has individual power switches and a switchbot

onyx ember Oct 29, 2024, 1:39 PM

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Can you give us more info on what you are trying to achieve i.e. why this needs to happen?

little grove Oct 29, 2024, 2:26 PM

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onyx ember Can you give us more info on what you are trying to achieve i.e. why this needs ...

If I just switch the power off (even with the machine's own switch - all that does it cut power too), then the control board continues getting a little power through the USB serial connection from my server, and weakly running the screen. In the past I've had strange behaviour when I've then powered it up again to print; so now I always manually remove the USB wire before I power down, and wait for the board to finish booting before plugging back in again.

little grove Oct 29, 2024, 2:27 PM

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fossil lintel How about combining an AC powered hub with a smart plug?

I'm not certain that powered hubs fully disconnect the device when powered off. In fact, I know that at least one of my hubs has optional power, but still works without power connected.

onyx ember Oct 29, 2024, 7:29 PM

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Does the printer need the power from the USB cable I wonder. If you went the other way and created a data only USB cable without 5v lines 🤔

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Don't do this unless you know it's safe 🙂

little grove Oct 30, 2024, 3:19 PM

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I have seen that as a suggestion somewhere before; but when I tried it back then it didn't seem to work. I don't really remember why.

finite sable Oct 30, 2024, 3:29 PM

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Check out the hubs listed here: https://github.com/mvp/uhubctl

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These hubs actually turn the ports completely off when used with the tool. You may even have a compatible one already.

little grove Oct 30, 2024, 9:48 PM

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Those look promising, thanks!

fossil lintel Oct 31, 2024, 4:57 AM

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Puddly's suggestion is cool. I hadn't heard of that. Here's what I was thinking about when combined with a switchbot (though software direct control is likely better) https://a.co/d/8xYUAuV

ONFINIO USB Hub 3.0, 7 Port USB Hub Splitter with Individual On/Off...

ONFINIO USB Hub 3.0, 7 Port USB Hub Splitter with Individual On/Off LED Switches, 5Gbps HighSpeed Data USB Extension for Laptop, iMac, USB Flash Drives, Mobile HDD, Printer, Camera and More

little grove Jan 13, 2025, 12:53 PM

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As an update to this, uhubctl is great and doing exactly what I need. I found one of the listed hubs on eBay, and with the right permissions I can fire the command through SSH from within the container on the HAOS VM.
Just working on getting the automation going with shell commands.

frozen sail Jan 13, 2025, 1:30 PM

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Try this one: https://pt.aliexpress.com/item/1005005876077166.html?spm=a2g0o.order_list.order_list_main.15.39c5caa4zTKxAG&gatewayAdapt=glo2bra

#Switch for connecting/disconnecting USB *data*, not only power. Does such a thing exist?

#Switch for connecting/disconnecting USB data, not only power. Does such a thing exist?