ErikZalm/Marlin — pull request #172 by daid (2012-05-19 17:16:39+00:00)
Title: Add M401 - Wait for user to press button on LCD (with optional timeout) minor fix in M115.

I've added an extra M-Code, M401. Which only works if you have an LCD panel. This command waits for the user to press the button on the LCD.

It can be used to wait at a certain layer for the user to insert something into the print, like other prints, or electronics.

There are also some language changes from Erik in the push. And a fix for the M115 extruder count report, which was always reporting 1 extruder.