ErikZalm/Marlin — pull request #223 by eagleapex (2012-08-23 03:31:18+00:00)
Title: Marlin v1

I added M250 as referenced here: http://reprap.org/wiki/Gcode#M250:_Take_picture
This triggers a relay that simulates a button press on a remote wire like this: http://www.instructables.com/id/Pentax-DSLR-cable-shutter-release-from-hands-free-/
It uses GND and 3 from Aux-4 on RAMPS 1.3. Pin 2 is digital 32.