I finally have some time to work with my tricopter project. I've been slowly getting things working. I just added the UBlox GPS to my APM 2.0. Nice upgrade - the tricopter no longer has the jitters in Loiter mode and the lock is super fast. Need to do more tweaking.
I have implemented the copter leds feature on my tricopter and I presently have motor arm status and GPS lock status working. Works great - the arming status is a good safety feature.
The only thing that doesn't seem to work is the low voltage alarm. I set the bit on and off and nothing happens. I assume the motor leds are supposed to oscillate at low voltage which appears to be set at 9.6V. I moved the voltage up higher - no change.
I have the AttoPilot sensor and its working properly - voltage and current displayed in Mission Planner. When voltage is below the set limit (verified in Mission Planner) nothing happens.
What am I missing?