Usb otg + charging pipo u6
i have a pipo U6 and i use custom Riley rom 1.2.
I have a project to use it in a Dashboard car (with pipo U6 is the same dimensions of my contour Dashboard).
I want to charge and use OTG at same time, i try differents diagrams.
i use a Y cable short pin 4 and 5 with resistor.
i use a variable resistor to find the exactly value.
the value i had find is 6.20kohms, the icon charging is ON, the OTG work fine,
but really it don't charge.
i open the tablet to extend button with wire (to use a steeringwheell). and i saw that the charging light doesn't work.
im not affraid to solder in motherboard.
I want to directly solder +5v and GND directly on pins of controller charging chip. but i dont have pipo diagram.
its possible? if not, i have another solution is to remove battery and use a converter ----> this is my last solution.
thanks sorry for my English.