Most USB hub chips I've seen don't have individual lines per-port. Instead they monitor the +5VDC rail for powering all USB devices, and grant requests to use power based on a configured power budget (how many amps the supply can push).

To hack it, I'd use a Pi with it's relay modules and cut the traces to the port, and then splice in a relay from the module (normally closed side of the relay). Then when you need to power-cycle, tell the Pi to cycle output X.

-Aaron

On Wed, Apr 27, 2016 at 11:44 AM, Dave Taht <dave.taht@gmail.com> wrote:

I am curious if there would be a way to use a powered usb3 hub to
individually be able to address and power cycle the ports individually
on it?

I have accumulated enough hackerboards powered via usb that it would
make sense to just power them all that way... kind of like I already
do with these:

http://www.digital-loggers.com/lpc.html

and just use that (rather than an individual power supply for each).

I am perpetually locking one up or losing connectivity to it for some
reason or another.

I figure somewhere in the usb spec/protocol/device driver/whatever
there would be a simple command to just flip the power on and off to
the port....

--
Dave Täht
Let's go make home routers and wifi faster! With better software!
http://blog.cerowrt.org
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