Sound is triggered when you enter a region. Regions are defined as polygons, each point is given by lat and long. This is intended for use as an entertaining gimmick, rather than for safety, due to ...

Navigate to the TOOLS menu in OpenTX, select "Betaflight setup" or "Betaflight CMS" and press the [ENTER] button. The first time the script is launched after a clean install or upgrade it will go ...