Complete Guide to FPV Drone GPS and Return To Home (RTH) — From Choosing GPS Chips to Setting Home Points and Tuning RTH Mode, All Techniques for Automatic Return Even When You Lose Your Way
Photo by Alex Gagareen on Unsplash FPV drone GPS and Return To Home (RTH) are essential safety features that automatically bring your drone home during signal loss or when it flies out of sight. By properly selecting a GPS chip, setting your home point, and tuning RTH, you can return your drone home reliably with a single button. Here's everything you need to know to master FPV drone GPS and RTH. GPS Module Selection — The First Step to RTH Choosing the right GPS module is foundational to RTH. Multiple GPS chips are available—ublox, STM32F4-based modules, and others—each with different performance, signal acquisition speed, and accuracy. Premium options like the ublox F9P offer centimeter-level accuracy but cost significantly more, while the M8N or M9N provide excellent accuracy at a better price point. Choose based on your flying needs and budget, but aim for a module with at least 5Hz update rate and accuracy within 1 meter. GPS Antenna Placement — The Key to Optimizing ...