Symptoms
- App warns of weak or no GPS signal
- Compass error message before or during flight
- Drone drifts or hovers unsteadily
- Return-to-home feature disabled due to error
Likely causes
- CommonFlying near metal, magnets, or electronics that interfere with the compassCars, buildings with rebar, and phones can distort the magnetic reading.
- CommonCompass needs recalibration after traveling or a firmware updateManufacturers recommend recalibrating in a new location or after updates.
- PossibleObstructed sky view limiting GPS satellite receptionTall buildings, trees, or overcast conditions can weaken signal.
- PossibleOutdated firmware affecting GPS or compass performanceFirmware updates sometimes improve satellite lock reliability.
- Less commonFaulty internal compass or GPS moduleHardware fault that persists despite calibration and clear sky.
What to do
- Move to an open area away from cars, metal structures, and large electronics.
- Follow the app's compass calibration procedure, usually rotating the drone in specific patterns.
- Wait for a strong GPS lock indicator in the app before attempting takeoff.
- Update the drone and controller firmware to the latest version.
- Avoid flying near power lines, cell towers, or large metal structures that can cause ongoing interference.
- Restart both the drone and the controller app if errors persist after calibration.
- If GPS or compass errors continue in a clear, open area with updated firmware, the internal module may need professional repair.
When to call a pro
If calibration in an open area with updated firmware doesn't clear the error, a drone repair specialist can test the GPS and compass modules.
Safety
Use caution
Do not fly with an active GPS or compass error, since the drone may drift unpredictably or lose the ability to return home automatically.