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libraries/audio-tools/examples/examples-communication/serial/mp3-custom/send-mp3/send-mp3.ino

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+
+/**
+ * @file send-mp3.ino
+ * @brief Example of sending an mp3 stream over Serial the AudioTools library.
+ * We use a custom pin to control the flow of the data. If we are ready to
+ * receive data, we set the pin to LOW. 
+ */
+
+#include "AudioTools.h"
+#include "AudioTools/AudioCodecs/CodecMP3Helix.h"
+#include "AudioTools/Communication/AudioHttp.h"
+
+URLStream url("ssid", "password");  // or replace with ICYStream to get metadata
+StreamCopy copier(Serial1, url);       // copy url to decoder
+// pins
+const int flowControlPin = 17;
+
+void setup() {
+  Serial.begin(115200);
+  AudioToolsLogger.begin(Serial, AudioToolsLogLevel::Error);
+
+  // setup flow control pin
+  pinMode(flowControlPin, INPUT_PULLUP);  // flow control pin
+
+  // setup serial data sink 
+  Serial1.begin(115200);
+
+  // mp3 radio
+  url.begin("http://stream.srg-ssr.ch/m/rsj/mp3_128", "audio/mp3");
+}
+
+void loop() {
+  if (digitalRead(flowControlPin) == LOW) {
+    copier.copy();
+  }
+}