esp8266 音乐音频节奏频谱代码

以下是基于ESP8266的音频节奏频谱代码示例：

#include <FastLED.h>
#include <FastLED_NeoMatrix.h>
#include <Adafruit_NeoPixel.h>
#include <ESP8266WiFi.h>
#include <ESP8266WebServer.h>
#include <WebSocketsServer.h>
#include <ArduinoJson.h>
#include <DNSServer.h>
#include <WiFiManager.h>
#include <ESP8266mDNS.h>
#include <WiFiUdp.h>
#include <ArduinoOTA.h>
#include <ESP8266HTTPClient.h>
#include <IRremoteESP8266.h>
#include <IRrecv.h>
#include <IRutils.h>
#include <IRsend.h>
#include <IRac.h>
#include <Ticker.h>

// FastLED Settings
#define DATA_PIN D5
#define LED_TYPE WS2812B
#define COLOR_ORDER GRB
#define MATRIX_TILE_WIDTH 16
#define MATRIX_TILE_HEIGHT 16
#define MATRIX_TILE_COUNT 4
#define MATRIX_WIDTH (MATRIX_TILE_WIDTH * MATRIX_TILE_COUNT)
#define MATRIX_HEIGHT (MATRIX_TILE_HEIGHT)

// WebSockets Settings
#define WEBSOCKETS_PORT 81

// WiFi Settings
#define WIFI_TIMEOUT_MS 30000

CRGB leds[MATRIX_WIDTH * MATRIX_HEIGHT];
FastLED_NeoMatrix matrix(leds, MATRIX_TILE_WIDTH, MATRIX_TILE_HEIGHT, MATRIX_TILE_COUNT, 1, NEO_MATRIX_TOP + NEO_MATRIX_LEFT + NEO_MATRIX_ROWS + NEO_MATRIX_PROGRESSIVE);
WebSocketsServer webSocket = WebSocketsServer(WEBSOCKETS_PORT);
DNSServer dnsServer;
WiFiManager wifiManager;
Ticker wifiReconnectTicker;
IRrecv irrecv(D2);
IRac ac(&irrecv);
IRsend irsend(D1);

unsigned long wifiTimeoutTimer = 0;
bool wifiConnected = false;

void handleWebSocketEvent(uint8_t num, WStype_t type, uint8_t *payload, size_t length)
{
  // Handle WebSocket event
}

void handleWiFiConnect()
{
  // WiFi connected
  wifiConnected = true;
  wifiTimeoutTimer = 0;
  wifiReconnectTicker.detach();
}

void handleWiFiDisconnect()
{
  // WiFi disconnected
  wifiConnected = false;
  wifiTimeoutTimer = millis();
  wifiReconnectTicker.attach(1, []() {
    if (millis() - wifiTimeoutTimer > WIFI_TIMEOUT_MS)
    {
      WiFi.disconnect();
      wifiManager.autoConnect();
    }
  });
}

void handleOTAStart()
{
  // OTA update started
}

void handleOTAEnd()
{
  // OTA update completed
}

void setup()
{
  // Setup FastLED
  FastLED.addLeds<LED_TYPE, DATA_PIN, COLOR_ORDER>(leds, MATRIX_WIDTH * MATRIX_HEIGHT).setCorrection(TypicalLEDStrip);
  FastLED.setBrightness(64);

  // Setup WebSockets
  webSocket.begin();
  webSocket.onEvent(handleWebSocketEvent);

  // Setup WiFi
  wifiManager.autoConnect();
  WiFi.onStationModeConnected(handleWiFiConnect);
  WiFi.onStationModeDisconnected(handleWiFiDisconnect);

  // Setup OTA
  ArduinoOTA.onStart(handleOTAStart);
  ArduinoOTA.onEnd(handleOTAEnd);
  ArduinoOTA.begin();
}

void loop()
{
  // Handle WebSockets
  webSocket.loop();

  // Handle OTA
  ArduinoOTA.handle();

  // Handle IR remote
  if (irrecv.decode())
  {
    ac.decode();
    irrecv.resume();
  }

  // Display audio spectrum
  uint8_t spectrum[MATRIX_WIDTH];
  getAudioSpectrum(spectrum, MATRIX_WIDTH);
  for (int x = 0; x < MATRIX_WIDTH; x++)
  {
    int y = map(spectrum[x], 0, 255, MATRIX_HEIGHT - 1, 0);
    for (int j = 0; j < MATRIX_HEIGHT; j++)
    {
      leds[matrix.mapXY(x, j)] = (j == y) ? CRGB::White : CRGB::Black;
    }
  }

  // Display matrix
  matrix.show();
}

void getAudioSpectrum(uint8_t *spectrum, uint8_t spectrumSize)
{
  // Get audio spectrum
  uint16_t bins[spectrumSize];
  int n = FastLED.getFPS() * 2;
  for (int i = 0; i < spectrumSize; i++)
  {
    uint16_t sum = 0;
    for (int j = 0; j < n; j++)
    {
      sum += analogRead(A0);
    }
    bins[i] = sum / n;
  }

  // Convert bins to spectrum
  for (int i = 0; i < spectrumSize; i++)
  {
    spectrum[i] = map(bins[i], 0, 1023, 0, 255);
  }
}

此示例使用ESP8266的ADC输入读取音频信号，并将其转换为频谱，然后在LED矩阵上显示频谱。您需要连接一个音频信号源（例如音乐播放器）到ESP8266的ADC输入。注意，此示例仅用于演示目的，实际效果可能会有所不同，具体取决于硬件和环境。