Hello, I have one problem: I connect 3DR radio to PC, next 3DR rádio to APM, click "connect" in the mission planners and everything is fine, but when I go to "hardware -> 3DR radio and I want to load setting from 3DR radio, mission planner write:…

Hi, I have for you one little question:What Sonar Sensor from this offer: http://store.diydrones.com/category_s/12.htm is preferable to operate with ArduCopter APM 2.5 on landing in outdoor conditions, but also inside the room, thanks a lot.

Hello, I have a question:What is the difference between this 3DR telemetry and other such Frsky?thanks a lot