Published August 30, 2022 © GPL3+

Web Radio

Internet radio on a TTGO T-Display controlled by a bluetooth android phone app

IntermediateWork in progress6,970

Things used in this project

Hardware components

Arduino ESP32 TTGO T-Display

UDA1334A Dac Module

HC-05 Bluetooth Module

Software apps and online services

Arduino IDE

Story

I have designed an internet radio using the new ESP32 TTGO T-Display and controlled by bluetooth from an android phone.

To make this work I had to use the external HC-05 bluetooth module as simultaneous wifi and bluetooth on an esp32 is problematic.

The sound is from a DAC module UDA1334A connected to an amplifier.

The url's for the radio are held in 6 different categories Trance, Lounge, UK, Talk, Dance, and Disco located in header files. Edit these as you wish or if some Url's fail to work.

Android app

The streaming is quite processor demanding and successive rapid button presses may crash the android app or the Arduino. Just close the app and reopen it. Also a few URL's may crash the Arduino causing it to reboot. Note the problem URL and remove it from the header file. This is a problem with the audio library not being designed to handle stream errors.

You need to edit the ino putting in your own router information, router SSID and Password before you compile the code.

Download and install the android pkg to your phone, it may complain that it could be malicious.. I promise you it is not.

Before opening the app turn on the phone bluetooth, connect the phone to the Arduino default ID is HC-05 password 1234. Then open the app and select HC-05 from the list.

The app can be closed at any time, you just need to re-open and reconnect the bluetooth.

The specific libraries I have used are

ESP32-audioI2S :: GitHub - schreibfaul1/ESP32-audioI2S: Play mp3 files from SD via I2S

ESPSoftwareSerial :: GitHub - plerup/espsoftwareserial: Implementation of the Arduino software serial for ESP8266

This overwrites the original SoftwareSerial library and supports ESP32

As i update the Arduino code i may also need to update the Android apk. I will give them the same version numbers so not to confuse. Try to use the ones with the same version numbers (uninstall the app.. reflash the TTGO).. if not the app may hang (nothing serious).

I've noticed that the new Android phone update will close the app saying it lacks permission. In that case, open the app settings on your phone and change the 'nearby device' setting to allow.

Schematics

Code

// UPDATED 3  SIZEOF NOW CALCULATES ELEMENTS (NOT BYTES)IN ARRAY
// UPDATED 2  INCLUDE APP GENRES and URL SETUP ON OPENING OF APP
// UPDATED 1  APP VERSION WITH VOLUME DISPLAY AND 60 CHAR URL

// IF YOU HAVE PREVIOUS CODE VERSIONS YOU NEED TO REFLASH
// IF YOU HAVE PREVIOUS ANDROID VERSION YOU NEED TO UNINSTALL IT

#include "Arduino.h"
#include <TFT_eSPI.h>
#include <WiFi.h>
#include <Audio.h> //https://github.com/schreibfaul1/ESP32-audioI2S
#include "Trance.h"
#include "Lounge.h"
#include "UK.h"
#include "Talk.h"
#include "Dance.h"
#include "Disco.h"
#include <SoftwareSerial.h> // This is the ESPSoftwareserial Version https://github.com/plerup/espsoftwareserial/


#define I2S_DOUT      25 // Preset I2S pins on the ESP32
#define I2S_BCLK      27
#define I2S_LRC       26

SoftwareSerial serialBT;

int CH_Pointer = 0;
int OLD_Pointer = 0;
int Volume = 15;
int action = -1;
int Genres = 1;
const String Spc = "                                                            ";
String Str = Spc;
String Str1;
int Sizeof;
int SizeofTrance;
int SizeofDance;
int SizeofDisco;
int SizeofLounge;
int SizeofTalk;
int SizeofUK;


#define blue 0x5D9B
#define darkred 0xA041

TFT_eSPI tft = TFT_eSPI(); // Invoke Custom Library
Audio audio;

String ssid =     "********";
String password = "********";


void setup() {
  Serial.begin(115200);
    int i = 0;
    while (Dance_Stations[i] != "EOF") {
      i++;
    }
    SizeofDance = i;
    i = 0;
    while (Disco_Stations[i] != "EOF") {
      i++;
    }
    SizeofDisco = i;
    i = 0;
        while (Lounge_Stations[i] != "EOF") {
      i++;
    }
    SizeofLounge = i;
    i = 0;
    while (Talk_Stations[i] != "EOF") {
      i++;
    }
    SizeofTalk = i;
    i = 0;
        while (Trance_Stations[i] != "EOF") {
      i++;
    }
    SizeofTrance = i;
    i = 0;
        while (UK_Stations[i] != "EOF") {
      i++;
    }
    SizeofUK = i;
    Sizeof = SizeofTrance;
    Serial.println(SizeofDance);
    Serial.println(SizeofDisco);
    Serial.println(SizeofLounge);
    Serial.println(SizeofTalk);
    Serial.println(SizeofTrance);
    Serial.println(SizeofUK);
  

    serialBT.begin(9600,SWSERIAL_8N1,13,12,false); // Bluetooth device name
    tft.init();
    tft.setRotation(3);
    tft.fillScreen(TFT_BLACK);
    WiFi.disconnect();
    WiFi.mode(WIFI_STA);
    WiFi.begin(ssid.c_str(), password.c_str());
    while (WiFi.status() != WL_CONNECTED) delay(1500);
    audio.setPinout(I2S_BCLK, I2S_LRC, I2S_DOUT);
    audio.setVolume(Volume); // 0...21
    CH_Change();

}

void loop(){

  action = serialBT.read();
  if (action > 0) {
    if (action < 7) {
      Genres = action ;
      CH_Pointer = 0;
      OLD_Pointer = 0;
      serialBT.print("1"); // Print URL
      CH_Change();
    }
    else {
      switch (action) {
        case 8:                  //App request for Genres and url
        serialBT.print(Genres);
        serialBT.print(Str.substring(0,60)); //Send URL info to app
        
        break;
        
        case 11:
        if (Volume > 0 ) {
          Volume--;
          audio.setVolume(Volume);
        }
          Str1 = String(Volume) + "  ";
          serialBT.print( Str1.substring(0,2));  // Send Volume level to phoone

         break;

        case 12:        
        if (Volume < 21) {
          Volume++;
          audio.setVolume(Volume);
        }
          Str1 = String(Volume) + "  ";
          serialBT.print( Str1.substring(0,2));  // Send Volume level to phoone

        break;

        case 13:
        if (CH_Pointer > 0) {
          CH_Pointer--;
          serialBT.print("1"); // Print URL
        }
        else {
        serialBT.print("0"); // Don't print URL
        }
        
        break;

        case 14:
        if (CH_Pointer < Sizeof) {
          CH_Pointer++;
          serialBT.print("1"); // Print URL
        }
        else {
          serialBT.print("0"); // Don't print URL
        }
        
        break;

        case 16 :
        audio.pauseResume();
        break;
        
      }

  if (OLD_Pointer != CH_Pointer) {
    OLD_Pointer = CH_Pointer;
    CH_Change();

          }

       }

    }


    audio.loop();
  
    }

void CH_Change() {
    audio.stopSong();
    tft.setTextColor(TFT_WHITE,TFT_BLACK);
    tft.setTextSize(3);
    tft.setCursor(10,10);
    tft.print("PLEASE WAIT                                                     ");
    tft.setCursor(10,10);    


  
  switch(Genres) {
    case 1:

    Str = String(Trance_Stations [CH_Pointer])+ Spc;
    serialBT.print(Str.substring(0,60));
    audio.connecttohost(Trance_Stations[CH_Pointer].c_str());
    Sizeof = SizeofTrance;
    tft.fillScreen(TFT_BLACK);
    tft.print("TRANCE");
    tft.setCursor(130,10);
    tft.println(CH_Pointer);
    tft.setTextColor(blue,TFT_BLACK);
    tft.setTextSize(2);
    tft.println(Trance_Stations [CH_Pointer]);
//    Serial.println(tft.getCursorY());
break;

    case 2:

    Str = String(Lounge_Stations [CH_Pointer])+ Spc;
    serialBT.print(Str.substring(0,60));
    audio.connecttohost(Lounge_Stations[CH_Pointer].c_str());
    Sizeof = SizeofLounge;
    tft.fillScreen(TFT_BLACK);
    tft.print("LOUNGE");
    tft.setCursor(130,10);
    tft.println(CH_Pointer);
    tft.setTextColor(blue,TFT_BLACK);
    tft.setTextSize(2);
    tft.println(Lounge_Stations [CH_Pointer]);
break;

    case 3:

    Str = String(UK_Stations [CH_Pointer])+ Spc;
    serialBT.print(Str.substring(0,60));
    audio.connecttohost(UK_Stations[CH_Pointer].c_str());
    Sizeof = SizeofUK;
    tft.fillScreen(TFT_BLACK);
    tft.print("UK");
    tft.setCursor(130,10);
    tft.println(CH_Pointer);
    tft.setTextColor(blue,TFT_BLACK);
    tft.setTextSize(2);
    tft.println(UK_Stations [CH_Pointer]);
break;

    case 4:

    Str = String(Talk_Stations [CH_Pointer])+ Spc;
    serialBT.print(Str.substring(0,60));
    audio.connecttohost(Talk_Stations[CH_Pointer].c_str());
    Sizeof = SizeofTalk;
    tft.fillScreen(TFT_BLACK);
    tft.print("TALK");
    tft.setCursor(130,10);
    tft.println(CH_Pointer);
    tft.setTextColor(blue,TFT_BLACK);
    tft.setTextSize(2);
    tft.println(Talk_Stations [CH_Pointer]);   
break;

    case 5:

    Str = String(Dance_Stations [CH_Pointer])+ Spc;
    serialBT.print(Str.substring(0,60));
    audio.connecttohost(Dance_Stations[CH_Pointer].c_str());  
    Sizeof = SizeofDance;
    tft.fillScreen(TFT_BLACK);
    tft.print("DANCE");
    tft.setCursor(130,10);
    tft.println(CH_Pointer);
    tft.setTextColor(blue,TFT_BLACK);
    tft.setTextSize(2);
    tft.println(Dance_Stations [CH_Pointer]);
break;
    
    case 6:

    Str = String(Disco_Stations [CH_Pointer])+ Spc;
    serialBT.print(Str.substring(0,60));
    audio.connecttohost(Disco_Stations[CH_Pointer].c_str());  
    Sizeof = SizeofDisco;
    tft.fillScreen(TFT_BLACK);
    tft.print("DISCO");
    tft.setCursor(130,10);
    tft.println(CH_Pointer);
    tft.setTextColor(blue,TFT_BLACK);
    tft.setTextSize(2);
    tft.println(Disco_Stations [CH_Pointer]);
break;
  
  }
 
}


// optional
/*
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){
  if (tft.getCursorY() < 100) {
    tft.setTextColor(TFT_WHITE,TFT_BLACK);
    tft.print(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

stevie135s

28 projects • 12 followers

I've been interested in microprocessors for a long time.

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Web Radio

Web Radio

Things used in this project

Hardware components

Software apps and online services

Story

Custom parts and enclosures

Web Radio v9

Schematics

Circuit

Code

URL_Zips

Web_Radio V10

Credits

stevie135s

Comments

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