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libraries/audio-tools/examples/examples-communication/http-client/streams-url_mp3-pwm/streams-url_mp3-pwm.ino

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+/**
+ * @file streams-url_mp3-out.ino
+ * @author Phil Schatzmann
+ * @brief decode MP3 stream from url and output it with the help of PWM
+ * @version 0.1
+ * @date 2021-96-25
+ * 
+ * @copyright Copyright (c) 2021
+ */
+
+// install https://github.com/pschatzmann/arduino-libhelix.git
+
+#include "AudioTools.h"
+#include "AudioTools/AudioCodecs/CodecMP3Helix.h"
+#include "AudioTools/Communication/AudioHttp.h"
+
+
+URLStream url("ssid","password");
+PWMAudioOutput out; // final output of decoded stream
+EncodedAudioStream dec(&out, new MP3DecoderHelix()); // Decoding stream
+StreamCopy copier(dec, url); // copy url to decoder
+
+
+void setup(){
+  Serial.begin(115200);
+  AudioToolsLogger.begin(Serial, AudioToolsLogLevel::Info);  
+
+  // setup out
+  auto config = out.defaultConfig(TX_MODE);
+  //config.resolution = 8;  // must be between 8 and 11 -> drives pwm frequency (8 is default)
+  // alternative 1
+  //config.start_pin = 3;
+  // alternative 2
+  int pins[] = {22, 23};
+  // alternative 3
+  //Pins pins = {3};
+  //config.setPins(pins); 
+  out.begin(config);
+
+  // setup I2S based on sampling rate provided by decoder
+  dec.begin();
+
+// mp3 radio
+  url.begin("http://stream.srg-ssr.ch/m/rsj/mp3_128","audio/mp3");
+
+}
+
+void loop(){
+  copier.copy();
+}