Well, first of all great job. I'm total newbie to vita hacking and recently made my vita 2000 come back from death with a reflow.
My initial plan was to connect a generic usb controller to It to play some arcade games with an otg cable. Maybe write something with vita sdk. I've tried with a normal otg but It don't work.
Then I got here. Questions:
1) With an Y otg cable and some sort of power It works?
2) This
https://github.com/dots-tb/ecchi-otg-2000 needs to be install on vita?