40 lines
1.3 KiB
C++
40 lines
1.3 KiB
C++
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/**
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* @file send-mp3.ino
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* @brief ESP32 Example of sending an mp3 stream over Serial the AudioTools library.
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* The processing must be synchronized with RTS/CTS flow control to prevent a
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* buffer overflow and lost data. We get the mp3 from an URLStream.
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* We used a ESP32 Dev Module for the test.
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*/
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#include <HardwareSerial.h>
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#include "AudioTools.h"
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#include "AudioTools/AudioCodecs/CodecMP3Helix.h"
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#include "AudioTools/Communication/AudioHttp.h"
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URLStream url("ssid", "password"); // or replace with ICYStream to get metadata
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HardwareSerial MP3Serial(1); // define a Serial for UART1
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StreamCopy copier(MP3Serial, url); // copy url to decoder
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// pins
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const int MySerialTX = 17; // TX2
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const int MySerialRX = -1; // not used
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const int MySerialRTS = 4; // GPIO 4
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const int MySerialCTS = -1; // not useed
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void setup() {
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Serial.begin(115200);
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AudioToolsLogger.begin(Serial, AudioToolsLogLevel::Info);
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// improve performance
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MP3Serial.setTxBufferSize(1024); // must be called before begin
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// setup serial data sink with flow control
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MP3Serial.begin(115200, SERIAL_8N1);
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MP3Serial.setPins(MySerialRX, MySerialTX, MySerialCTS, MySerialRTS);
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MP3Serial.setHwFlowCtrlMode(UART_HW_FLOWCTRL_CTS_RTS);
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// mp3 radio
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url.begin("http://stream.srg-ssr.ch/m/rsj/mp3_128", "audio/mp3");
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}
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void loop() { copier.copy(); } |