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WS2812 RGB12燈燈環模組
專案說明
使用「科易KEYES Arduino UNO R3 開發板」連接「WS2812 RGB12燈燈環模組」, 在WS2812 RGB12燈燈環模組上顯示燈環的顏色。
KEYES Arduino UNO R3電路圖
- 通用型彩色Sensor shield v5.0感測器擴充板
- WS2812 RGB12燈燈環模組
WS2812 RGB12燈燈環模組是數位訊號輸出， 可以接「D0 ~ D13」的 KEYES Arduino UNO R3訊號端上。 本範例連接到「D3」
Arduino 程式
由於WS2812 RGB12燈燈環模組是函式庫型模組，所以需要先在Arduino上下載函式庫，下載方法如下。
在Arduino上選擇工具，選擇管理程式庫，在管理程式庫搜尋Adafruit NeoPixel選擇Adafruit NeoPixel by Adafruit版本1.2.5並安裝。
在WS2812 RGB12燈燈環模組上顯示依序點亮綠色的燈，每0.5秒依序開啟各個LED燈。pixels.setPixelColor(i, pixels.Color(0, 150, 0));裡面的數值分別代表RGB顏色的數值，數值範圍為0-255，可以依據自己想亮燈的顏色去改變數值。
產生出的 Arduino 程式如下
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#include <Adafruit_NeoPixel.h>
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#ifdef __AVR__
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#include <avr/power.h> // Required for 16 MHz Adafruit Trinket
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#endif
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// Which pin on the Arduino is connected to the NeoPixels?
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#define PIN 3 // On Trinket or Gemma, suggest changing this to 1
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// How many NeoPixels are attached to the Arduino?
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#define NUMPIXELS 12 // Popular NeoPixel ring size
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// When setting up the NeoPixel library, we tell it how many pixels,
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// and which pin to use to send signals. Note that for older NeoPixel
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// strips you might need to change the third parameter -- see the
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// strandtest example for more information on possible values.
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Adafruit_NeoPixel pixels(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);
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#define DELAYVAL 500 // Time (in milliseconds) to pause between pixels
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void setup() {
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// These lines are specifically to support the Adafruit Trinket 5V 16 MHz.
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// Any other board, you can remove this part (but no harm leaving it):
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#if defined(__AVR_ATtiny85__) && (F_CPU == 16000000)
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clock_prescale_set(clock_div_1);
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#endif
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// END of Trinket-specific code.
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pixels.begin(); // INITIALIZE NeoPixel strip object (REQUIRED)
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}
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void loop() {
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pixels.clear(); // Set all pixel colors to 'off'
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// The first NeoPixel in a strand is #0, second is 1, all the way up
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// to the count of pixels minus one.
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for(int i=0; i<NUMPIXELS; i++) { // For each pixel...
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// pixels.Color() takes RGB values, from 0,0,0 up to 255,255,255
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// Here we're using a moderately bright green color:
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pixels.setPixelColor(i, pixels.Color(0, 150, 0));
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pixels.show(); // Send the updated pixel colors to the hardware.
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delay(DELAYVAL); // Pause before next pass through loop
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}
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}
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