Repetier V2 can, V1 can"t control it. Macro to defin eit is LIGHT_SOURCE_NEOPIXEL(name, outputPin, pixelType, count, state)but it not documented.
geoffreyforest Thank you for the feedback. Looks like V2 is still in alpha. Do you have a timeline for V2 being available in the configurator?
Repetier It works completely different so probably will never get a configurator. Due to lack of time I make no predictions about it"s development, but what is included works.