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零知-ESP32 使用ESP32微控制器对8 bit-2812 RGB灯带进行控制，实现了多种不同的灯光效果。实现彩虹颜色轮换函数，连续颜色变换效果。实现闪烁和颜色渐变效果，随机进行颜色闪烁。实现流水灯和呼吸灯效果，利用PWM调整亮度。 ESP32实现Web网页控制WS2812B点亮不同颜色的效果。
1、使用工具电脑、Windows系统 零知-ESP32开发板 Micro-usb线 WS2812RGB灯
2、硬件连接零知-ESP32开发板 | WS2812B | 5V | VCC | GND | GND | 23 | Din |
硬件连接示意图
3、代码部分网页控制部分
将Adafruit_NeoPixel.h和WiFi.h导入至项目中 定义一些变量用于存放WS2812RGB和网页HTTP的参数
-
- // 引入Adafruit_NeoPixel库
- #include <Adafruit_NeoPixel.h>
- #include <WiFi.h>
- // 连接的WS2812B的引脚，根据实际情况修改
- #define PIN 23
- // 灯珠数量，根据实际情况修改
- #define NUM_LEDS 8
- // 创建Adafruit_NeoPixel对象
- Adafruit_NeoPixel pixels = Adafruit_NeoPixel(NUM_LEDS, PIN, NEO_GRB + NEO_KHZ800);
- // 用于解析HTTP GET值的字符串
- String redString = "0";
- String greenString = "0";
- String blueString = "0";
- int pos1 = 0;
- int pos2 = 0;
- int pos3 = 0;
- int pos4 = 0;
- // 存储HTTP请求的变量
- String header;
- // 设置web服务器端口号为80
- WiFiServer server(80);
-
设置串口波特率为115200并打开
初始化WS2812B，配置WiFi网络或热点，ESP32连接网络 void setup() {
Serial.begin(115200);
// 初始化WS2812B
pixels.begin();
pixels.setBrightness(86);//设置亮度数值S(max=255)
pixels.show(); //灯带显示
// 连接Wi-Fi网络，这里需要修改成自己的SSID和密码
const char* ssid = "xx";
const char* password = "xx";
Serial.println();
Serial.print("Connecting to ");
Serial.println(ssid);
WiFi.begin(ssid, password);
while (WiFi.status()!= WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.println("WiFi connected.");
Serial.println("IP address: ");
Serial.println(WiFi.localIP());
server.begin();
pixels.setPixelColor(0, pixels.Color(255, 0, 0));
pixels.show();
} 配置网页，生成调色器控制像素输出到WS2812RGB上显示不同颜色 - void loop() {
- WiFiClient client = server.available(); // 监听传入的客户端
- if (client) { // 如果有新客户端连接
- String currentLine = "";
- while (client.connected()) {
- if (client.available()) {
- char c = client.read();
- Serial.write(c);
- header += c;
- if (c == '\n') {
- if (currentLine.length() == 0) {
- client.println("HTTP/1.1 200 OK");
- client.println("Content-type:text/html");
- client.println("Connection: close");
- client.println();
- // Display the HTML web page
- client.println("<!DOCTYPE html><html>");
- client.println("<head><meta name="viewport" content="width=device-width, initial-scale=1">");
- client.println("<link rel="icon" href="data:,">");
- client.println("<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css">");
- client.println("<script src="https://cdnjs.cloudflare.com/ajax/libs/jscolor/2.0.4/jscolor.min.js"></script>");
- client.println("</head><body><div class="container"><div class="row"><h1>ESP Color Picker</h1></div>");
- client.println("<a class="btn btn-primary btn-lg" href="#" id="change_color" role="button">Change Color</a> ");
- client.println("<input class="jscolor {onFineChange:'update(this)'}" id="rgb"></div>");
- client.println("<script>function update(picker) {document.getElementById('rgb').innerHTML = Math.round(picker.rgb[0]) + ', ' + Math.round(picker.rgb[1]) + ', ' + Math.round(picker.rgb[2]);");
- client.println("document.getElementById("change_color").href="?r" + Math.round(picker.rgb[0]) + "g" + Math.round(picker.rgb[1]) + "b" + Math.round(picker.rgb[2]) + "&";}</script></body></html>");
- if (header.indexOf("GET /?r") >= 0) {
- pos1 = header.indexOf('r');
- pos2 = header.indexOf('g');
- pos3 = header.indexOf('b');
- pos4 = header.indexOf('&');
- redString = header.substring(pos1 + 1, pos2);
- greenString = header.substring(pos2 + 1, pos3);
- blueString = header.substring(pos3 + 1, pos4);
- // 设置WS2812B的颜色
- pixels.clear();
-
- // 将RGB值转换为整数
- if (redString.startsWith("0x")) {
- redString = redString.substring(2);
- }
- int red = strtol(redString.c_str(), NULL, 16);
- // 对green和blue值也进行同样的操作
- int green = strtol(greenString.c_str(), NULL, 16);
- int blue = strtol(blueString.c_str(), NULL, 16);
-
- for (int i = 0; i < NUM_LEDS; i++) {
- pixels.setPixelColor(i, pixels.Color(red, green, blue));
- }
- pixels.show(); }
- break;
- } else {
- currentLine = "";
- }
- } else if (c!= '\r') {
- currentLine += c;
- }
- }
- }
- // 清空header变量
- header = "";
- client.stop();
- Serial.println("Client disconnected.");
- Serial.println("");
- }
- }
不同点亮效果部分 实现WS2812RGB闪烁、呼吸灯和流水灯、颜色循环点亮等效果
- #include<Arduino.h>
- #include <Adafruit_NeoPixel.h>
-
- #define WS2812_PIN 23 //灯带引脚
- #define WS2812_NUM 8 //灯的数量
- #define Bright 255 //灯珠亮度
- #define Delay_T 10 //延时时间
-
- #define WS2812_C_RED 18 //红色
- #define WS2812_C_ORANGE 54 //橙色
- #define WS2812_C_YELLOW 90 //**色
- #define WS2812_C_GREEN 126 //绿色
- #define WS2812_C_CYAN 162 //青色
- #define WS2812_C_BIUE 198 //蓝色
- #define WS2812_C_PURPIE 234 //紫色
-
- //使用RGB模式控制ws2812类型灯带
- Adafruit_NeoPixel strip(WS2812_NUM, WS2812_PIN, NEO_GRB + NEO_KHZ800);
-
- void setup() {
- WS2812_Init();//初始化
- }
-
- void loop() {
- for (uint8_t i = 0; i < 3; i++) {
- //---起始灯珠---结束灯珠---灯珠颜色--------//
- WS2812_ColoredLight(0, WS2812_NUM, WS2812_C_PURPIE);
- delay(1000); // 延时1S
- WS2812_StopAppointLight(0, WS2812_NUM);
- delay(1000); // 延时1S
- }
-
- // 调用新添加的函数
- WS2812_Blink(0, WS2812_NUM % 2, WS2812_C_GREEN, 5, 500);
- WS2812_Fade(WS2812_NUM / 2, WS2812_NUM, WS2812_C_YELLOW, WS2812_C_RED, 100);
- WS2812_RandomBlink(0, WS2812_NUM, 3, 300);
-
- WS2812_RunningLight(0, WS2812_NUM, 100);
-
- WS2812_BreathingLight_PWM(0, WS2812_NUM, 10);
-
- // 彩虹灯效（注意注释中的警告）
- WS2812_Start_ContinuousColoredLight(0, 16);
- }
-
- /**
- * @brief WS2812的初始化
- * @param 无
- * @retval 无
- **/
-
- void WS2812_Init(void)
- {
- //Adafruit_NeoPixel strip(LED_NUM, LED_PIN, NEO_GRB + NEO_KHZ800);
-
- strip.begin(); //初始化灯带
- strip.setBrightness(Bright);//设置亮度数值S(max=255)
- strip.show(); //灯带显示
-
- }
-
-
- /**
- * @brief 点亮第n到m个彩色LED灯（慎用，会进入死循环）
- * @param Start，开始的灯珠
- * @param Stop，结束的灯珠
- * @retval 无
- **/
-
- void WS2812_Start_ContinuousColoredLight(uint8_t Start, uint8_t Stop)//
- {
- uint8_t x=0,y=0;
- for (uint8_t j = 0; j < 256; j++)
- {
- //--------灯珠颜色------起始灯珠-------结束灯珠-------//
- strip.fill(Rainbow(j & 255), Start, Stop);//连续点亮多个灯珠
- // Serial.println("x=");
- // Serial.println(x);
- //strip.setPixelColor(1, Rainbow(j & 255));//点亮一个灯珠
- strip.show();
- // Serial.println("y=");
- // Serial.println(y);
- //x++;
- // y++;
- delay(Delay_T);
- }
- //Serial.println("ok");
- }
-
-
- /**
- * @brief 关闭第n到m个彩色LED灯
- * @param Start，开始的灯珠
- * @param Stop，结束的灯珠
- * @retval 无
- **/
-
- void WS2812_StopAppointLight(uint8_t Start, uint8_t Stop)
- {
- strip.fill(strip.Color(0, 0, 0), Start, Stop);//熄灭点亮多个灯珠
- strip.show();
- delay(Delay_T);
- }
-
-
- /**
- * @brief 设置第n到m个LED灯
- * @param Start，开始的灯珠
- * @param Stop，结束的灯珠
- * @param Color, LED的颜色
- * @retval 无
- **/
-
- void WS2812_ColoredLight(uint8_t Start, uint8_t Stop, uint8_t Color)//
- {
- //--------灯珠颜色------起始灯珠-------结束灯珠-------//
- strip.fill(Rainbow(Color), Start, Stop);
- strip.show();
- delay(Delay_T);
- //Serial.println("ok");
- }
-
- /**
- * @brief 点亮第n个LED灯，颜色自定
- * @param location，第几个灯珠
- * @param Colored，色号（0 <= Colored < 256）
- * @retval 无
- **/
-
- void WS2812_OneLight(uint8_t location, uint8_t Colored)
- {
- strip.setPixelColor(location, Rainbow(Colored));//点亮一个灯珠
- strip.show();
- delay(Delay_T);
- }
-
- /**
- * @brief 关闭所以灯
- * @param 无
- * @retval 无
- **/
- void WS2812_Clear(void)
- {
- strip.clear();
- strip.show();
- strip.fill(strip.Color(0, 0, 0), 0, WS2812_NUM);//熄灭点亮多个灯珠
- // strip.show();
- // delay(Delay_T);
- }
-
-
- /**
- * @brief 颜色循环函数
- * @param WheelPos，颜色
- * @retval 无
- **/
-
- uint32_t Rainbow(byte WheelPos)
- {
- WheelPos = 255 - WheelPos;
- if (WheelPos < 85) {
- return strip.Color(255 - WheelPos * 3, 0, WheelPos * 3);
- }
- if (WheelPos < 170) {
- WheelPos -= 85;
- return strip.Color(0, WheelPos * 3, 255 - WheelPos * 3);
- }
- WheelPos -= 170;
- return strip.Color(WheelPos * 3, 255 - WheelPos * 3, 0);
- }
-
- // 闪烁效果函数
- void WS2812_Blink(uint8_t Start, uint8_t Stop, uint8_t Color, uint8_t times, uint16_t blinkDelay) {
- for (uint8_t i = 0; i < times; i++) {
- WS2812_ColoredLight(Start, Stop, Color);
- delay(blinkDelay);
- WS2812_StopAppointLight(Start, Stop);
- delay(blinkDelay);
- }
- }
-
- // 渐变效果函数
- void WS2812_Fade(uint8_t Start, uint8_t Stop, uint8_t startColor, uint8_t endColor, uint16_t stepDelay) {
- for (uint8_t i = startColor; i <= endColor; i++) {
- WS2812_ColoredLight(Start, Stop, i);
- delay(stepDelay);
- }
- for (uint8_t i = endColor; i >= startColor; i--) {
- WS2812_ColoredLight(Start, Stop, i);
- delay(stepDelay);
- }
- }
-
- // 随机颜色闪烁函数
- void WS2812_RandomBlink(uint8_t Start, uint8_t Stop, uint8_t times, uint16_t blinkDelay) {
- for (uint8_t i = 0; i < times; i++) {
- uint8_t randomColor = random(0, 256);
- WS2812_ColoredLight(Start, Stop, randomColor);
- delay(blinkDelay);
- WS2812_StopAppointLight(Start, Stop);
- delay(blinkDelay);
- }
- }
-
- // 流水灯效果函数
- void WS2812_RunningLight(uint8_t Start, uint8_t Stop, uint16_t stepDelay) {
- for (uint8_t i = Start; i < Stop; i++) {
- WS2812_OneLight(i, WS2812_C_PURPIE);
- delay(stepDelay);
- WS2812_OneLight(i, 0);
- }
- }
-
- // 呼吸灯效果函数（使用PWM概念，通过改变占空比来实现亮度变化）
- void WS2812_BreathingLight_PWM(uint8_t Start, uint8_t Stop, uint16_t stepDelay) {
- for (int dutyCycle = 0; dutyCycle < 255; dutyCycle++) {
- for (uint8_t i = Start; i < Stop; i++) {
- uint32_t color = strip.Color(0, 0, dutyCycle);
- strip.setPixelColor(i, Rainbow(color));
- }
- strip.show();
- delay(stepDelay);
- }
- for (int dutyCycle = 255; dutyCycle >= 0; dutyCycle--) {
- for (uint8_t i = Start; i < Stop; i++) {
- uint32_t color = strip.Color(0, 0, dutyCycle);
- strip.setPixelColor(i, Rainbow(color));
- }
- strip.show();
- delay(stepDelay);
- }
- }
4、成果展示 打开esp32的ip地址，显示调色板
点击Change Color后串口打印输出
WS2812RGB被点亮成红色
不同点亮效果的视频
https://live.csdn.net/v/436104?spm=1001.2014.3001.5501
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发表于 2025-2-20 10:13:07
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