Archived:LEDs (APM 2.x)

Warning

ARCHIVED

The APM2.x is end of life for use with ArduPilot. This article is made available for existing users.

APM 2.5 board

LED: Behavior:
Power On when powered
**A (red)** Solid = armed, motors will spin when throttle raisedSingle Blink = disarmed, motors will not spinDouble Blink = disarmed, motors will not spin, cannot arm because of failure in pre-arm checks
**B (yellow)** Only flashes along with A and B during calibration or as part of the in-flight auto trim feature
**C (blue)** Solid = GPS working, 3D lockBlinking = GPS working, no LockOFF = GPS not attached or not working
PPM/Serial Flashing when data detected
../_images/APM25leds2.jpg

APM 2.0 board

LEDs: Behavior:
Power On when powered
3D Fix Flashing while GPS is waiting for a fix; solid once it has a fix
ABC See below
../_images/LED_and_their_meaning_APM2.jpg