An open source, STM32G0B1 based controller for Nevermore Stealthmax air filters for Voron 3D printers. Eliminates the complicated wiring needed for the Nevermore Stealthmax, adds "real" (AKA 4-pin PWM) fan control for the filter fan, reads sensor data from I2C air quality sensors and controls LEDs. Works with Klipper firmware. Communicate
