Connecting the radio

Connecting the radio to the ArduPilot is one of the easiest things. You can choose a short-range or long range radio. I would suggest you use the 3DR radio. It is easy to set up via the ArduPilot software and is easy to use. The radio will be directly connected to the ArduPilot and will send signals to the receiver connected to the PC. This is required when your drone is fully assembled and you need to calibrate the drone without any external wire connected to it. The radio will be connected via the Telem port.