Maker and IoT Ideas
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Stereo I2S Shield - Second iteration

Some improvements on the previous design, exposing more features and reducing the overall size of the PCB

IntermediateWork in progress2 hours256
Stereo I2S Shield - Second iteration

Things used in this project

Hardware components

PCBWay Custom PCB
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Story

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Schematics

Schematic

Code

Sample Code

Arduino
Sample code for testing basic operation of the shield. This DOES NOT include code for controlling the rotary encoders t oset volume and stations, nor does it include code for the planned I2C display.
/*
  Simple Internet Radio Demo
  esp32-i2s-simple-radio.ino
  Simple ESP32 I2S radio
  Uses MAX98357 I2S Amplifier Module
  Uses ESP32-audioI2S Library - https://github.com/schreibfaul1/ESP32-audioI2S

  
*/

// Include required libraries

#include "Arduino.h"
#include "WiFi.h"
#include "Audio.h"
#include "ESPmDNS.h"
#include "time.h"



// Define I2S connections
#define I2S_DOUT  22
#define I2S_BCLK  26
#define I2S_LRC   25



// Create audio object
Audio audio;

// Wifi Credentials
String ssid =    "<your ssid here>";
String password = "<your password here>";

void audioTask(void *pvParameters) {
  while(1) {
    audio.loop();
  }
}


void setup() {

  // Start Serial Monitor
  Serial.begin(115200);
  

  // Setup WiFi in Station mode
  WiFi.disconnect();
  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid.c_str(), password.c_str());

  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  // WiFi Connected, print IP to serial monitor
  Serial.println("");
  Serial.println("WiFi connected");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());
  Serial.println("");

  // Connect MAX98357 I2S Amplifier Module
  audio.setPinout(I2S_BCLK, I2S_LRC, I2S_DOUT);
  
  // Set thevolume (0-100)
  audio.setVolume(10);

  // Connect to an Internet radio station (select one as desired)
  //audio.connecttohost("http://vis.media-ice.musicradio.com/CapitalMP3");
  //audio.connecttohost("mediaserv30.live-nect MAX98357 I2S Amplifier Module
  //audio.connecttohost("www.surfmusic.de/m3u/100-5-das-hitradio,4529.m3u");
  //audio.connecttohost("stream.1a-webradio.de/deutsch/mp3-128/vtuner-1a");
  //audio.connecttohost("www.antenne.de/webradio/antenne.m3u");
  //audio.connecttohost("0n-80s.radionetz.de:8000/0n-70s.mp3");
  //audio.connecttohost("http://live.webhosting4u.gr:1150/stream");
  audio.connecttohost("0n-80s.radionetz.de:8000/");
  disableCore0WDT();
  xTaskCreatePinnedToCore(audioTask,"audiotask",10000,NULL,15,NULL,0);
}


void loop()

{
  // Run audio player
  //audio.loop();
 
}


//

// Audio status functions

void audio_info(const char *info) {
  Serial.print("info        "); Serial.println(info);
}
void audio_id3data(const char *info) { //id3 metadata
  Serial.print("id3data     "); Serial.println(info);
}
void audio_eof_mp3(const char *info) { //end of file
  Serial.print("eof_mp3     "); Serial.println(info);
}
void audio_showstation(const char *info) {
  Serial.print("station     "); Serial.println(info);
}
void audio_showstreaminfo(const char *info) {
  Serial.print("streaminfo  "); Serial.println(info);
}
void audio_showstreamtitle(const char *info) {
  Serial.print("streamtitle "); Serial.println(info);
}
void audio_bitrate(const char *info) {
  Serial.print("bitrate     "); Serial.println(info);
}
void audio_commercial(const char *info) { //duration in sec
  Serial.print("commercial  "); Serial.println(info);
}
void audio_icyurl(const char *info) { //homepage
  Serial.print("icyurl      "); Serial.println(info);
}
void audio_lasthost(const char *info) { //stream URL played
  Serial.print("lasthost    "); Serial.println(info);
}
void audio_eof_speech(const char *info) {
  Serial.print("eof_speech  "); Serial.println(info);
}

Credits

Maker and IoT Ideas
97 projects • 25 followers
I design custom PCB solutions, usually with an IoT or Automation twist, to solve problems in my daily life. Sometimes also for other people.
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