45 lines
1.4 KiB
Arduino
45 lines
1.4 KiB
Arduino
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/**
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* @file basic-generator-a2dp.ino
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* @author Phil Schatzmann
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* @brief We send a test sine signal to a bluetooth speaker
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* @copyright GPLv3
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*/
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#include "AudioTools.h"
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#include "AudioTools/Communication/A2DPStream.h" // https://github.com/pschatzmann/ESP32-A2DP
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const char* name = "LEXON MINO L"; // Replace with your bluetooth speaker name
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SineGenerator<int16_t> sineWave(15000); // subclass of SoundGenerator, set max amplitude (=volume)
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GeneratedSoundStream<int16_t> in_stream(sineWave); // Stream generated from sine wave
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BluetoothA2DPSource a2dp_source; // A2DP Sender
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// callback used by A2DP to provide the sound data - usually len is 128 * 2 channel int16 frames
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int32_t get_sound_data(uint8_t * data, int32_t len) {
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return in_stream.readBytes((uint8_t*)data, len);
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}
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// Arduino Setup
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void setup(void) {
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Serial.begin(115200);
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AudioToolsLogger.begin(Serial, AudioToolsLogLevel::Warning);
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// start input
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auto cfg = in_stream.defaultConfig();
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cfg.bits_per_sample = 16;
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cfg.channels = 2;
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cfg.sample_rate = 44100;
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in_stream.begin(cfg);
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sineWave.begin(cfg, N_B4);
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// start the bluetooth
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Serial.println("starting A2DP...");
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a2dp_source.set_auto_reconnect(false);
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a2dp_source.set_data_callback(get_sound_data);
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a2dp_source.start(name);
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}
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// Arduino loop - repeated processing
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void loop() {
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delay(1000);
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}
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