wtf is freefcc?

FreeFCC is a free, open source Android app that unlocks FCC mode on certain DJI smart controllers that have a screen, such as the RC2 and RC Pro 2. Drones sold in most regions are limited to a lower radio power setting called CE mode. FCC mode allows higher power and more channels, which can mean a stronger connection between the drone and controller. The app works by sending raw command files, called DUML commands, directly to the controller. There is no server involved, no license check, and no tracking beyond an optional update check. Beyond the FCC switch, the app can send activation frames for 4G connectivity on controllers that support a cellular dongle, turn the aircraft's arm LEDs on or off, and read basic hardware and firmware information from the controller. It also has an auto FCC option that reapplies the unlock automatically every time the app opens, plus a built in updater that checks GitHub for new releases. The project is clear about what it cannot do. It does not remove the 120 meter altitude limit or unlock no fly zones, since those restrictions are enforced separately by DJI's own Fly app rather than by settings on the controller itself. The developer explains that bypassing this would require modifying DJI's app or its firmware, which is outside what this tool does. Installing FreeFCC does not need a computer. The README walks through formatting a microSD card in the controller, copying over a folder of helper apps plus the FreeFCC file, and installing them directly on the controller's screen. The project includes a disclaimer that changing radio settings may not be legal everywhere, and it is the user's responsibility to check local rules before using FCC mode. The software is licensed under AGPL 3.0.