Added a live FFT graph to the dashboard today. You can watch the fan’s spin show up as a spike at 37.5 Hz, which is about 2250 rpm. Kind of cool that I measured my fan’s speed with an accelerometer.
Also made the Arduino’s LED light up when it spots a fault, so it’s not just on the screen. And added a slider for how sensitive it is, because it kept flipping between healthy and faulty when it wasn’t sure