Connect Mission Planner to AutoPilot¶
This article explains how to connect Mission Planner to an autopilot in order to receive telemetry and control the vehicle.
There are separate instructions for connecting in order to Load Firmware.
Setting up the connection¶
To establish a connection you must first choose the communication method/channel you want to use, and then set up the physical hardware and Windows device drivers. You can connect the PC and autopilot using USB cables, Telemetry Radios, Bluetooth, IP connections etc.
The driver for your connection hardware must be present on Windows as this makes your connection’s COM port and default data rate available to Mission Planner.
On Mission Planner, the connection and data rate are set up using the drop down boxes in the upper right portion of the screen.
Once you’ve attached the USB or Telemetry Radio, Windows will automatically assign your autopilot a COM port number, and that will show in the drop-down menu (the actual number does not matter). The appropriate data rate for the connection is also set (typically the USB connection data rate is 11520 and the radio connection rate is 57600).
Select the desired port and data rate and then press the Connect button to connect to the autopilot. After connecting Mission Planner will download parameters from the autopilot and the button will change to Disconnect as shown:
The “select port” dropdown also contains TCP or UDP port options that can be used to connect to an autopilot over a network.
If Mission planner is unable to connect:
- Check that the correct baud rate is used for the selected method (115200 on USB or 57600 on Radio/Telemetry)
- If using a COM port on Windows, check that the connection’s COM port exists in the Windows Device Manager’s list of serial ports.
- If using a USB port, try a different physical USB port
- if using a UDP or TCP connection, check that your firewall is not blocking the IP traffic.
You should also ensure that the autopilot controller board has appropriate ArduPilot firwmare installed and has booted correctly (on Pixhawk/PX4 there are useful LEDs and Sounds which can tell you the state of the autopilot).