I currently have andropilot running OK with my 3DR radio and just installed Droidplanner 2 to try out. When I connect the 3DR radio via USB Andropilot starts up automatically. I close Andropilot but am unable to get Droidplanner to connect. Do I need to un-insyall Andropilot to get Droidplanner to see the 3DR radio and connect.
Try unplug the rmodem and re-plug, don’t choose automatic connection, allow the tablet ask you what program you prefer to use.