> This is a peripheral.  USB OTG doesn't apply,
and USB-A would be
> "inappropriate".  Pretend this is an inkjet printer.  What plug would
> you expect to find on that? 
On Tue, 14 Feb 2017, Chris Elmquist wrote:
  A Centronics-style 36-pin Amphenol.
 oh, sorry.  <crawls back under rock> 
("blue-ribbon")
A DB25
Howzbout a DE-9?
Original style USB-B