ESP01s小玩具里我最喜欢的一个，为啥？别问，帅就完事了。（3/3）
什么是性能的象征？ R！G！B！ 什么是男人的信仰？ R！G！B！ 你会选择女人还是RGB？ 当然！R！G！B！
演示视频
首先安装WS2812支持库
点击项目>加载库>库管理器>搜索NeoPixel>安装库
因为，示例程序使用的就是这个库。当然你可以直接搜索WS2812，选择一个你觉得顺手的库
示例代码
1
2#include <Adafruit_NeoPixel.h>
3#ifdef __AVR__
4 #include <avr/power.h>
5#endif
6
7#define PIN 2
8
9#define NUM_LEDS 16
10
11#define BRIGHTNESS 50
12
13Adafruit_NeoPixel strip = Adafruit_NeoPixel(NUM_LEDS, PIN, NEO_GRBW + NEO_KHZ800);
14
15byte neopix_gamma[] = {
16 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
17 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1,
18 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2,
19 2, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 5, 5, 5,
20 5, 6, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8, 9, 9, 9, 10,
21 10, 10, 11, 11, 11, 12, 12, 13, 13, 13, 14, 14, 15, 15, 16, 16,
22 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 24, 24, 25,
23 25, 26, 27, 27, 28, 29, 29, 30, 31, 32, 32, 33, 34, 35, 35, 36,
24 37, 38, 39, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 50,
25 51, 52, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 66, 67, 68,
26 69, 70, 72, 73, 74, 75, 77, 78, 79, 81, 82, 83, 85, 86, 87, 89,
27 90, 92, 93, 95, 96, 98, 99,101,102,104,105,107,109,110,112,114,
28 115,117,119,120,122,124,126,127,129,131,133,135,137,138,140,142,
29 144,146,148,150,152,154,156,158,160,162,164,167,169,171,173,175,
30 177,180,182,184,186,189,191,193,196,198,200,203,205,208,210,213,
31 215,218,220,223,225,228,231,233,236,239,241,244,247,249,252,255 };
32
33
34void setup() {
35 // This is for Trinket 5V 16MHz, you can remove these three lines if you are not using a Trinket
36 #if defined (__AVR_ATtiny85__)
37 if (F_CPU == 16000000) clock_prescale_set(clock_div_1);
38 #endif
39 // End of trinket special code
40 strip.setBrightness(BRIGHTNESS);
41 strip.begin();
42 strip.show(); // Initialize all pixels to 'off'
43}
44
45void loop() {
46 // Some example procedures showing how to display to the pixels:
47 colorWipe(strip.Color(255, 0, 0), 50); // Red
48 colorWipe(strip.Color(0, 255, 0), 50); // Green
49 colorWipe(strip.Color(0, 0, 255), 50); // Blue
50 colorWipe(strip.Color(0, 0, 0, 255), 50); // White
51
52 whiteOverRainbow(20,75,5);
53
54 pulseWhite(5);
55
56 // fullWhite();
57 // delay(2000);
58
59 rainbowFade2White(3,3,1);
60
61
62}
63
64// Fill the dots one after the other with a color
65void colorWipe(uint32_t c, uint8_t wait) {
66 for(uint16_t i=0; i<strip.numPixels(); i++) {
67 strip.setPixelColor(i, c);
68 strip.show();
69 delay(wait);
70 }
71}
72
73void pulseWhite(uint8_t wait) {
74 for(int j = 0; j < 256 ; j++){
75 for(uint16_t i=0; i<strip.numPixels(); i++) {
76 strip.setPixelColor(i, strip.Color(0,0,0, neopix_gamma[j] ) );
77 }
78 delay(wait);
79 strip.show();
80 }
81
82 for(int j = 255; j >= 0 ; j--){
83 for(uint16_t i=0; i<strip.numPixels(); i++) {
84 strip.setPixelColor(i, strip.Color(0,0,0, neopix_gamma[j] ) );
85 }
86 delay(wait);
87 strip.show();
88 }
89}
90
91
92void rainbowFade2White(uint8_t wait, int rainbowLoops, int whiteLoops) {
93 float fadeMax = 100.0;
94 int fadeVal = 0;
95 uint32_t wheelVal;
96 int redVal, greenVal, blueVal;
97
98 for(int k = 0 ; k < rainbowLoops ; k ++){
99
100 for(int j=0; j<256; j++) { // 5 cycles of all colors on wheel
101
102 for(int i=0; i< strip.numPixels(); i++) {
103
104 wheelVal = Wheel(((i * 256 / strip.numPixels()) + j) & 255);
105
106 redVal = red(wheelVal) * float(fadeVal/fadeMax);
107 greenVal = green(wheelVal) * float(fadeVal/fadeMax);
108 blueVal = blue(wheelVal) * float(fadeVal/fadeMax);
109
110 strip.setPixelColor( i, strip.Color( redVal, greenVal, blueVal ) );
111
112 }
113
114 //First loop, fade in!
115 if(k == 0 && fadeVal < fadeMax-1) {
116 fadeVal++;
117 }
118
119 //Last loop, fade out!
120 else if(k == rainbowLoops - 1 && j > 255 - fadeMax ){
121 fadeVal--;
122 }
123
124 strip.show();
125 delay(wait);
126 }
127
128 }
129
130
131
132 delay(500);
133
134
135 for(int k = 0 ; k < whiteLoops ; k ++){
136
137 for(int j = 0; j < 256 ; j++){
138
139 for(uint16_t i=0; i < strip.numPixels(); i++) {
140 strip.setPixelColor(i, strip.Color(0,0,0, neopix_gamma[j] ) );
141 }
142 strip.show();
143 }
144
145 delay(2000);
146 for(int j = 255; j >= 0 ; j--){
147
148 for(uint16_t i=0; i < strip.numPixels(); i++) {
149 strip.setPixelColor(i, strip.Color(0,0,0, neopix_gamma[j] ) );
150 }
151 strip.show();
152 }
153 }
154
155 delay(500);
156
157
158}
159
160void whiteOverRainbow(uint8_t wait, uint8_t whiteSpeed, uint8_t whiteLength ) {
161
162 if(whiteLength >= strip.numPixels()) whiteLength = strip.numPixels() - 1;
163
164 int head = whiteLength - 1;
165 int tail = 0;
166
167 int loops = 3;
168 int loopNum = 0;
169
170 static unsigned long lastTime = 0;
171
172
173 while(true){
174 for(int j=0; j<256; j++) {
175 for(uint16_t i=0; i<strip.numPixels(); i++) {
176 if((i >= tail && i <= head) || (tail > head && i >= tail) || (tail > head && i <= head) ){
177 strip.setPixelColor(i, strip.Color(0,0,0, 255 ) );
178 }
179 else{
180 strip.setPixelColor(i, Wheel(((i * 256 / strip.numPixels()) + j) & 255));
181 }
182
183 }
184
185 if(millis() - lastTime > whiteSpeed) {
186 head++;
187 tail++;
188 if(head == strip.numPixels()){
189 loopNum++;
190 }
191 lastTime = millis();
192 }
193
194 if(loopNum == loops) return;
195
196 head%=strip.numPixels();
197 tail%=strip.numPixels();
198 strip.show();
199 delay(wait);
200 }
201 }
202
203}
204void fullWhite() {
205
206 for(uint16_t i=0; i<strip.numPixels(); i++) {
207 strip.setPixelColor(i, strip.Color(0,0,0, 255 ) );
208 }
209 strip.show();
210}
211
212
213// Slightly different, this makes the rainbow equally distributed throughout
214void rainbowCycle(uint8_t wait) {
215 uint16_t i, j;
216
217 for(j=0; j<256 * 5; j++) { // 5 cycles of all colors on wheel
218 for(i=0; i< strip.numPixels(); i++) {
219 strip.setPixelColor(i, Wheel(((i * 256 / strip.numPixels()) + j) & 255));
220 }
221 strip.show();
222 delay(wait);
223 }
224}
225
226void rainbow(uint8_t wait) {
227 uint16_t i, j;
228
229 for(j=0; j<256; j++) {
230 for(i=0; i<strip.numPixels(); i++) {
231 strip.setPixelColor(i, Wheel((i+j) & 255));
232 }
233 strip.show();
234 delay(wait);
235 }
236}
237
238// Input a value 0 to 255 to get a color value.
239// The colours are a transition r - g - b - back to r.
240uint32_t Wheel(byte WheelPos) {
241 WheelPos = 255 - WheelPos;
242 if(WheelPos < 85) {
243 return strip.Color(255 - WheelPos * 3, 0, WheelPos * 3,0);
244 }
245 if(WheelPos < 170) {
246 WheelPos -= 85;
247 return strip.Color(0, WheelPos * 3, 255 - WheelPos * 3,0);
248 }
249 WheelPos -= 170;
250 return strip.Color(WheelPos * 3, 255 - WheelPos * 3, 0,0);
251}
252
253uint8_t red(uint32_t c) {
254 return (c >> 16);
255}
256uint8_t green(uint32_t c) {
257 return (c >> 8);
258}
259uint8_t blue(uint32_t c) {
260 return (c);
261}
Arduino IDE 编译烧录固件
这里我们不再啰嗦一遍，如何烧录上传固件了，需要的话可以看这里