Getting Started with RP2040 on Arduino IDE: A Beginner’s Guide

				
					#include <Adafruit_NeoPixel.h>

// Define the pin where the NeoPixel is connected
#define PIN 16       // Change this to the pin you connected the NeoPixel data line to

// Define the number of NeoPixels in your strip
#define NUMPIXELS 1  // Change this to the number of pixels you have

// Create the NeoPixel object
Adafruit_NeoPixel pixels(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);

void setup() {
  pixels.begin(); // Initialize the NeoPixel library
  pixels.show();  // Initialize all pixels to 'off'
}

void loop() {
  colorWipe(pixels.Color(255, 0, 0), 50); // Red
  colorWipe(pixels.Color(0, 255, 0), 50); // Green
  colorWipe(pixels.Color(0, 0, 255), 50); // Blue
  rainbowCycle(10);                        // Rainbow cycle
}

void colorWipe(uint32_t color, int wait) {
  for (int i = 0; i < pixels.numPixels(); i++) {
    pixels.setPixelColor(i, color);
    pixels.show();
    delay(wait);
  }
}

void rainbowCycle(int wait) {
  uint16_t i, j;

  for (j = 0; j < 256 * 5; j++) { // 5 cycles of all colors on the wheel
    for (i = 0; i < pixels.numPixels(); i++) {
      pixels.setPixelColor(i, Wheel(((i * 256 / pixels.numPixels()) + j) & 255));
    }
    pixels.show();
    delay(wait);
  }
}

uint32_t Wheel(byte WheelPos) {
  WheelPos = 255 - WheelPos;
  if (WheelPos < 85) {
    return pixels.Color(255 - WheelPos * 3, 0, WheelPos * 3);
  }
  if (WheelPos < 170) {
    WheelPos -= 85;
    return pixels.Color(0, WheelPos * 3, 255 - WheelPos * 3);
  }
  WheelPos -= 170;
  return pixels.Color(WheelPos * 3, 255 - WheelPos * 3, 0);
}