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

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+/**
+ * @file base-audiokit-a2dp.ino
+ * @author Phil Schatzmann
+ * @brief We play the input from the ADC to an A2DP speaker
+ * @copyright GPLv3
+ */
+
+#include "AudioTools.h"
+#include "AudioTools/AudioLibs/AudioBoardStream.h"
+#include "AudioTools/Communication/A2DPStream.h"
+
+AudioInfo info(44100, 2, 16);
+BluetoothA2DPSource a2dp_source;
+AudioBoardStream i2s(AudioKitEs8388V1);
+const int16_t BYTES_PER_FRAME = 4;
+
+// callback used by A2DP to provide the sound data - usually len is 128 2 channel int16 frames
+int32_t get_sound_data(Frame* data, int32_t frameCount) {
+  return i2s.readBytes((uint8_t*)data, frameCount*BYTES_PER_FRAME)/BYTES_PER_FRAME;
+}
+
+// Arduino Setup
+void setup(void) {
+  Serial.begin(115200);
+  AudioToolsLogger.begin(Serial, AudioToolsLogLevel::Info);
+
+  // start i2s input with default configuration
+  Serial.println("starting I2S...");
+  auto cfg = i2s.defaultConfig(RX_MODE);
+  cfg.i2s_format = I2S_STD_FORMAT; // or try with I2S_LSB_FORMAT
+  cfg.copyFrom(info);
+  cfg.input_device = ADC_INPUT_LINE2; // microphone
+  i2s.begin(cfg);
+
+  // start the bluetooth
+  Serial.println("starting A2DP...");
+  a2dp_source.set_data_callback_in_frames(get_sound_data);
+  a2dp_source.start("LEXON MINO L");  
+}
+
+// Arduino loop - repeated processing 
+void loop() {
+  delay(1000);
+}