I'm running Marlin on a 3D printer board using an ATmega 2560 based board with a reprap discount LCD controller with an SD card slot. I would like to do this without the need to add another computer/board, so native from the board running the Marlin Firmware.
While an LCD controller is not needed for auto#.g to work, if you have an LCD controller you can use the
MENU_ADDAUTOSTARToption to add a menu command that will run the auto0.g, auto1.g, auto2.g whenever you want.
This (final) post ended up closing the thread so it appears to answer the OP's question - however, whether it will answer your question is another matter.