the code, schematic, and PDF for the rack enclosure CAD drawing are all on my GitHub.
it uses an Arduino Mega 2560, BTS7960 motor controller, adafruit Si7021 temp/humidity sensor, BV4243 display/control panel, and a salvaged camper furnace blower fan.
the only known bug is that the configuration either does not save, or it does not read in. i will post updates as i have them.
it has been a while since i posted a project, so be easy on me 
~Travis