I recently purchased a spark and I've done a lot of YouTube video research about the OTG cable. I use the remote controller and a tablet currently to control my spark but was trying to hook up an OTG cable. I turned off the Wi-Fi on tablet and hooked the OTG cable from the tablet to the controller and it seems that the controller almost goes into a charging State as if you were charging it instead of connecting the tablet and controller together through the cable. Any help on how to actually get disconnected or did I waste money on OTG cable. And I don't know if the new version of the DJI go 4 app is maybe a walking out the OTG cable feature?