"That works! I just typed a V in the box and it showed COM15V in the planner. Then I clicked COM15 again, and Connect and that's all.
Thank you Michael."
"I have the same problem using APM Planner 2.0.13. With MissionPlanner 1.3.7 all works well (COM15). The Devicemanager shows: Arduino Mega 2560 (COM15).
Also the View Terminal button is not visible.
Ardupilot 2.6
Log:
INFO 2014-07-15T13:50:06.687…"