GPS LED & Buzzer Meaning
RGB UI LED
The meaning of the big RGB UI LED depends on the Firmware you use. The definition can be found here:
Other LEDs (Model Dependent)
Fix (3D Fix)
Off - No 3D Fixed
Blink/Solid On - 3D fixed
RTK (RTK Fix)
Off - Not in RTK mode
Blink - Float RTK (Blinking is not available in some model)
Solid - Fixed RTK
GEO - Used for geofence settings (set through ucenter). This is an user-defined on and off status light, it can be either on or off when the fence conditions are met.
PWR - Always on when the power is normal.
ERR (ERROR) - Lights up when module self-test fails
EVT (EVENT) - LED is off when no eventin. Short blinks indicate there is an event in
LOG Button LED - LED is ON when the SD card is present or mounted.
Buzzer Meaning
Safety Switch (Red LED)
Ardupilot firmware (Wiki)
Constant blinking - system is initialising
Intermittent fast blinking - system is ready. press the safety switch to enable output to the motors.
Solid - safety switch has been pressed, motors and servos are able to move once the vehicle is armed.
PX4 Autopilot (Guide)
Slow blinking - system is ready. press the safety switch to enable output to the motors.
Intermittent fast blinking - safety switch has been pressed, motors and servos are able to move once the vehicle is armed.
Solid – Vehicle is armed
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