Fan Controller for server cabinet

For noise, dust, and space reasons I moved my servers into a custom cabinet but I needed some way to remove the hot air. I could just attach a fan attached to a constant power source but even the best fans are a little noisy at full blast and it doesn't need to be most of the time.

The optimal temperature range for the cabinet is between 68 and 71 degrees Fahrenheit.

The code lives on the chip which is running micropython. Connect it and download/edit the code if you need to change it.