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libraries/audio-tools/examples/examples-communication/a2dp/basic-generator-a2dp/basic-generator-a2dp.ino

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+/**
+ * @file basic-generator-a2dp.ino
+ * @author Phil Schatzmann
+ * @brief We send a test sine signal to a bluetooth speaker
+ * @copyright GPLv3
+*/
+
+#include "AudioTools.h"
+#include "AudioTools/Communication/A2DPStream.h"
+
+const char* name = "LEXON MINO L";                        // Replace with your bluetooth speaker name  
+SineWaveGenerator<int16_t> sineWave(15000);               // subclass of SoundGenerator, set max amplitude (=volume)
+GeneratedSoundStream<int16_t> in_stream(sineWave);        // Stream generated from sine wave
+BluetoothA2DPSource a2dp_source;                          // A2DP Sender
+
+// callback used by A2DP to provide the sound data - usually len is 128 * 2 channel int16 frames
+int32_t get_sound_data(uint8_t * data, int32_t len) {
+  return in_stream.readBytes((uint8_t*)data, len);
+}
+
+// Arduino Setup
+void setup(void) {
+  Serial.begin(115200);
+  AudioToolsLogger.begin(Serial, AudioToolsLogLevel::Warning);
+
+  // start input 
+  auto cfg = in_stream.defaultConfig();
+  cfg.bits_per_sample = 16;
+  cfg.channels = 2;
+  cfg.sample_rate = 44100;
+  in_stream.begin(cfg);
+  sineWave.begin(cfg, N_B4);
+
+
+  // start the bluetooth
+  Serial.println("starting A2DP...");
+  a2dp_source.set_auto_reconnect(false);
+  a2dp_source.set_data_callback(get_sound_data);
+  a2dp_source.start(name);  
+}
+
+// Arduino loop - repeated processing 
+void loop() {
+  delay(1000);
+}