Low voltage LED only

[Natael]

Hello,

Switching from multiwii to megapirateNG. I have the crius V2.0 from HK and have read the documentation from Jumpy07.
I know there is an LED mode with the firmware, if i understand correctly these are preset LED behavior to tell specific steps in the setup.

I would like to add an external LED strip (i';ve got a few from HK), to simply blink whenever my battery voltage is low (given a global voltage, say, 10V). I';m already familiar with setting up a voltage divider to get a voltage sensor with arduino. I also have the telemetry with frSky with the voltage on the little separate LCD screen on my radio. Yet so far, I can';t see anything related to making an LED-only (no buzzer) with the CRIUS / megapirateNG.
I';ve been thinking about making my own LED-voltage sensor with a separate arduino pro mini, but that would be better to have this handled by the crius.

I don';t want a buzzer as i';m flying indoors a mini tricopter, it';s too loud in my apartment, and the neighbors will confuse it with the fire alarm.

Does someone know how to setup that with CRIUS with megapirateNG / mission planner / config.h, ... ?

Thanks.