三色彩灯模块

#include <FastLED.h>

#define DATA_PIN 7
#define NUM_LEDS 4
CRGB leds[NUM_LEDS];
uint8_t max_bright = 128;
void setup() 
{
  FastLED.addLeds<WS2812, DATA_PIN, GRB>(leds, NUM_LEDS);
  FastLED.setBrightness(max_bright);
}

void loop() {
  for (int i = 0; i < NUM_LEDS; i++) {
    leds[i] = CRGB::Red;
    FastLED.show();
    delay(500);
    leds[i] = CRGB::Black;
  }
}