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Alright I've actually bothered to have a sit down and read through USB OTG specs sheet and it does seem there is a fifth pin added for the spec. Essentially it is floating on the slave and grounded on the host. If micro-usb wasn't so dang small I'd just solder on a fifth pin connected direct to ground, but I don't like my chances. Guess I'll order one in.
 Originally Posted by NathanD
The hints from the author of video:
1. you need OTG cable, where the ID pin is shorted to provide Touuchpad a hint that you want usb host mode.
Not shorted, but grounded (although I suppose it depends your definition of shorted).
 Originally Posted by vdubskey
I don't think the problem lies in the micro USB cable. I think its not using a powered hub that sends 5v down the input USB port, connected to the touchpad. Most hubs only provide power to just the peripheral side. He mentions in the video to use a hub that provides power on the "upstream"? That's maybe what he was referring too.
Makes sense. Although my Y cable powers the touchpad when I plug it in, and there is definitely 5v at the connection to both the keyboard and touchpad.
EDIT: Which does lead me back to my original question, why did the OP link to a regular spec USB adapter that doesn't seem to support OTG?
EDIT2: Seems the usb cable packaged with the tablet comes with 5 pins on the micro side, I may just be tempted to hack it up.
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