PX4 Overview
PX4 is an open-source flight control firmware developed by the Dronecode Project, widely used in enterprise and research drones. It features a modular architecture, ROS 2 integration, uORB messaging, and strong support for VTOL, fixed-wing, and ground robots. PX4 is preferred for new commercial designs and integrates with QGroundControl.
Industry Data
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ArduPilot Overview
ArduPilot is the older and more mature open-source autopilot, supporting the widest range of hardware and vehicle types (copter, plane, rover, sub). It offers extensive parameter tuning, mission planning, and peripheral support. ArduPilot is preferred for fixed-wing, complex missions, and legacy hardware.
Key Decision Factors
Choose PX4 for: new enterprise designs, ROS 2 integration, VTOL, clean codebase, commercial support. Choose ArduPilot for: fixed-wing, broad hardware support, mature mission features, community knowledge base. Both support RTK, terrain following, geofencing, and payload control.
Companion Computers
For advanced autonomy (obstacle avoidance, computer vision, swarm), a companion computer (Raspberry Pi, Jetson Nano/Xavier, Intel NUC) runs Linux and communicates with the autopilot via MAVLink. This offloads processing from the flight controller while maintaining real-time flight safety.
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