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libraries/audio-tools/examples/sandbox/websockets/client-as-source/client/client.ino

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+/**
+ * @brief A simple WebSocket client sketch that sends out some PCM audio
+ * data using the https://github.com/Links2004/arduinoWebSockets library.AdapterAudioStreamToAudioOutput.AdapterAudioStreamToAudioOutput
+ * The WebSocket API is asynchronous, so we need to slow down the sending
+ * to the playback speed, to prevent any buffer overflows at the receiver.
+ * @author Phil Schatzmann
+ */
+
+#include <WebSocketsClient.h>  // https://github.com/Links2004/arduinoWebSockets
+#include <WiFiMulti.h>
+#include "AudioTools.h"
+#include "AudioTools/Communication/WebSocketOutput.h"
+
+// websocket
+WiFiMulti WiFiMulti;
+WebSocketsClient webSocket;
+WebSocketOutput out(webSocket);
+// audio
+AudioInfo info(44100, 2, 16);
+SineWaveGenerator<int16_t> sineWave(32000);
+GeneratedSoundStream<int16_t> sound(sineWave);
+Throttle throttle(out)
+StreamCopy copier(throttle, sound);
+
+void setup() {
+  Serial.begin(115200);
+
+  // connect to wifi
+  WiFiMulti.addAP("SSID", "passpasspass");
+  while (WiFiMulti.run() != WL_CONNECTED) {
+    delay(100);
+  }
+  WiFi.setSleep(false);
+
+  // start client connecting to server address, port and URL
+  webSocket.begin("192.168.1.34", 81, "/");
+
+  // try ever 5000 again if connection has failed
+  webSocket.setReconnectInterval(5000);
+
+  sineWave.begin(info, N_B4);
+  // WebSockets are async, so we need to slow down the sending
+  throttle.begin(info);
+}
+
+void loop() {
+  webSocket.loop();
+  // generate audio only when we are connected
+  if (webSocket.isConnected()) copier.copy();
+}