#### Description adds support for the Sparkfun RPI pico (`rpi-pico`) in the `ws281x` driver. The test command in `tests/driver_ws281x/` can be used to test the feature. ### Useful links * https://www.sparkfun.com/products/18288 * https://www.sparkfun.com/products/18721