Nodemcu 驱动WS2812点灯红色变绿色的原因及解决

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已于 2022-10-08 15:09:26 修改 · 1.7k 阅读

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#FastLed #WS2812

于 2022-10-01 10:32:00 首次发布

本文记录了使用FastLED库在VSCODE PlatformIO环境下点亮WS2812 LED灯过程中遇到的颜色反转问题，即代码设置红色显示为绿色。通过调整颜色顺序参数解决了这一问题。

初次接触FastLed,先点灯。开发环境VSCODE PlatformIO 。

直接使用FastLed的示例blink程序，略有修改DATA_PIN D1，注释掉CLOCK_PIN。

#include <FastLED.h>

// How many leds in your strip?
#define NUM_LEDS 1

// For led chips like WS2812, which have a data line, ground, and power, you just
// need to define DATA_PIN.  For led chipsets that are SPI based (four wires - data, clock,
// ground, and power), like the LPD8806 define both DATA_PIN and CLOCK_PIN
// Clock pin only needed for SPI based chipsets when not using hardware SPI
#define DATA_PIN D1
#define BRIGHTNESS 8
// #define CLOCK_PIN 13

// Define the array of leds
CRGB leds[NUM_LEDS];

void setup() { 
    // Uncomment/edit one of the following lines for your leds arrangement.
    // ## Clockless types ##
    
    FastLED.addLeds<WS2812, DATA_PIN, RGB>(leds, NUM_LEDS);  // GRB ordering is typical
 FastLED.setBrightness( BRIGHTNESS );    
}

void loop() { 
  // Turn the LED on, then pause
  leds[0] = CRGB::Red;