As noted in the introduction, another way to experiment the new Bosch sensor is to get a PurpleAir PIXEL USB dongle for $119 that changes its RGB LED color depending on the AQI value. It’s a ...

Most MCU boards only include a few LEDs, and that includes the Raspberry Pi Pico family, which only features one user LED. The Pico Indicator fixed that ... but all I could find were RGB Matrix ...