Can you connect a controller with an usb otg cable or do u need root for this to work ? i have a ps3 controller.
Yes, you can connect a controller via usb OTG cable/adapter without root. I connect my "Enter E-GPV gamepad" using OTG cable and "PNY OTG adapter". But unfortunately my gamepad's keys are not getting mapped correctly, so I am unable to play any game. I think you have a PS3 controller, so it will work properly.