Overview

Go beyond the default firmware. Build the custom flight solution your project demands. Are you hitting the limits of standard flight controllers? Is it time to move from ""user"" to ""developer""? Developing with PX4 is the architect's guide to the internal workings of the world's most advanced open-source autopilot. While many books cover basic setup, this guide is written specifically for those who need to modify the source code, create custom modules, and extend the system's core capabilities. Whether you are building a specialized delivery vehicle or a novel VTOL airframe, this book provides the roadmap to mastering the PX4 ecosystem. From setting up a professional build environment to understanding the intricacies of the uORB messaging bus, this book takes you under the hood of a real-time operating system (NuttX) and shows you how to engineer custom flight behaviors from the ground up. Inside this developer's manual, you will learn how to: Master the uORB Messaging Bus: Learn how internal modules communicate in real-time and how to subscribe to or publish your own data topics. Create Custom Modules: Step-by-step instructions on writing, compiling, and running your own applications within the PX4 firmware. Modify Control Laws: Understand the architecture of the Multicopter and Fixed-Wing controllers to implement proprietary flight logic. Design Custom Mixers: Learn how to define new airframe types and map actuator outputs for non-standard motor and servo configurations. Engineer Driver Support: Technical guidance on writing drivers for new sensors and peripherals using the I2C, SPI, and UART interfaces. Optimize the Build System: Navigate the CMake-based build process and learn to manage different hardware targets, from Pixhawk to custom carrier boards. Who is this book for? This text is written for embedded systems engineers, software developers, and robotics researchers. If you are comfortable with C++ and want to contribute to or customize the future of autonomous flight, this is your definitive guide. Take command of the source code. Scroll up and secure your copy to start building your custom PX4 solution today!

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