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PX4

Visualize PX4 flight logs​

Foxglove can open PX4 ULog (.ulg) files natively for visualization. ULog files contain flight data recorded by PX4 autopilots, including sensor readings, actuator outputs, and system state information.

Record flight data​

PX4 automatically logs flight data to ULog files when the autopilot is armed. The logs are typically stored on the SD card or in the log directory on your flight controller.

To manually start logging or configure logging parameters, use the PX4 command line interface or QGroundControl. For more details on recording and managing ULog files, see the PX4 logging documentation.

Open your recording​

Open your recording(s) directly from your computer by:

  • Dragging and dropping them into Foxglove
  • Using Cmd/Ctrl + o
  • Clicking Open local file(s) in the app

Local file dialog

note

When opening multiple files, Foxglove will display the data as a single merged timeline. The files must be of the same format.

Explore your data​

Your data is now available for exploring in Foxglove. Add some panels to begin visualizing what your robot is seeing and producing. Not sure where to start? Try adding a Raw Messages panel, Plot panel, or 3D panel.

To list available topics, open the left sidebar and open the Topics tab.

Topics tab

Learn more​

  • Explore all of the panels Foxglove has to offer for viewing and exploring data
  • Create and save sets of panels and their settings as layouts to reuse them or share with teammates