This firmware is a variant of Marlin that allows for control of the pneumatic system for PancakeBot®. Useful information Marlin_main.cpp holds the case instructions for control of the vacuum pump speed based on the "Pressure" knob on the PancakeBot Console. The AIR_PUMP is located on pin 9 Cardreader.cpp holds the code for the AIR_PUMP and LED_SDERROR, and LED_WORKING, LED_POWEROFF, LED_POWERON pins.h define the pin configurations of the board.