ESP32使用POST请求发送一个音频文件该如何发送

您可以使用ESP32的HTTPClient库来发送POST请求，并将音频文件作为请求体发送。以下是一个示例代码片段：

#include <WiFi.h>
#include <HTTPClient.h>

const char* ssid = "your_SSID";
const char* password = "your_PASSWORD";
const char* serverUrl = "http://example.com/upload_audio";

void setup() {
  Serial.begin(115200);
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi...");
  }
}

void loop() {
  // Open the audio file
  File audioFile = SPIFFS.open("/audio.wav", "r");
  if (!audioFile) {
    Serial.println("Failed to open audio file");
    return;
  }

  // Connect to the server
  HTTPClient http;
  http.begin(serverUrl);

  // Set the content type header
  http.addHeader("Content-Type", "audio/wav");

  // Send the audio file as the request body
  int httpResponseCode = http.sendRequest("POST", audioFile, audioFile.size());
  if (httpResponseCode > 0) {
    Serial.print("HTTP response code: ");
    Serial.println(httpResponseCode);
  } else {
    Serial.println("Error sending POST request");
  }

  // Close the file and disconnect from the server
  audioFile.close();
  http.end();

  delay(5000); // Wait 5 seconds before sending another request
}

请注意，上述代码仅用作示例，并未进行完整测试。在实际使用中，请根据您的具体需求进行适当修改和测试。