Phone thinks app is battery charger, """Disconnected."""

[gunga galunga]

Galaxy 20. I changed the usb settings to file transfer to no avail.
Dji Go, P3P. plug/ unplug 8 10 times until it connects. Phone always displays battery charge screen for a second. Tried turning plug over and tried different cords.

 

[quaddamage]

most likely reason:
gl300a or HDMI output -> DaVinci on Interface board
gl300b/c ->damaged USB or input FFCs around Interface Board

details - either wait for someone to explain, or search the net and look around the wiki linked above.

 

[gunga galunga]

4 drones, 4 controllers, different cables, same """ disconnected """ message.
Seems like the phone.

 

[crash1sttime]

Galaxy 20. I changed the usb settings to file transfer to no avail.
Dji Go, P3P. plug/ unplug 8 10 times until it connects. Phone always displays battery charge screen for a second. Tried turning plug over and tried different cords.

enable developer mode and enable adb