[GTALUG] Emulating a USB keyboard using ???

[Lennart Sorensen]

On Sat, Dec 05, 2015 at 11:10:40AM -0500, William Park wrote:
> Hi guys,
> 
> Do you know a way to emulate a USB keyboard using Raspberry Pi,
> BeagleBone Black, ODROID, or some other embedded board?  That is, as far
> as PC is concerned, it's receiving keypresses from some keyboard.
> 
> I know those boards have UART pins.  But, even if I connect the pins to
> a serial-to-USB cable, the USB end of the cable will show up as serial
> (/dev/ttyUSBx) and not as keyboard.  I have such a cable, and that's
> what I see.

If it supports linux's USB gadget interface then you should be in luck:

https://www.kernel.org/doc/Documentation/usb/gadget_hid.txt

Raspberry pie can NOT do it, since it has a permanent USB hub connected,
and you can't have a hub connected to the port to use it in gadget mode
(since gadget mode means being a USB client, not a host).

The BBB on the hand can do it.  I didn't check the others.

-- 
Len Sorensen