Volume Control Help!

Using Arduino Project Guidance
1 


#include "BluetoothA2DPSink.h"

BluetoothA2DPSink a2dp_sink;

int VolumeupButton = 13;
int VolumedownButton = 14;
int PlayButton = 15;
int PauseButton = 16;
int StopButton = 17;
int NextButton = 18;
int PreviousButton = 19;

int command;
int Volume = 100;
const int MaxVolume = 2000;
const int MinVolume = 0;
const int VolumeIncrement = 100; 

#include <BleSerial.h>
#include <esp_attr.h>
#include <esp_task_wdt.h>
#include <driver/rtc_io.h>
#include "soc/rtc_wdt.h"

const int BUFFER_SIZE = 8192;

BleSerial SerialBT;

uint8_t unitMACAddress[6];  // Use MAC address in BT broadcast and display
char deviceName[20];        // The serial string that is broadcast.


uint8_t bleReadBuffer[BUFFER_SIZE];
uint8_t serialReadBuffer[BUFFER_SIZE];

void startBluetooth() {
  // Get unit MAC address
  esp_read_mac(unitMACAddress, ESP_MAC_WIFI_STA);
  
  unitMACAddress[5] += 2;                                                          
  
  //Create device name
  sprintf(deviceName, "BleBridge-%02X%02X", unitMACAddress[4], unitMACAddress[5]); 

  //Init BLE Serial
  SerialBT.begin(deviceName);
  SerialBT.setTimeout(10);
}

//Task for reading Serial Port
void ReadSerialTask(void *e) {
  while (true) {
    if (Serial.available()) {
      auto count = Serial.readBytes(serialReadBuffer, BUFFER_SIZE);
      SerialBT.write(serialReadBuffer, count);
    }
    delay(20);
  }
}

//Task for reading BLE Serial
void ReadBtTask(void *e) {
  while (true) {
    if (SerialBT.available()) {
      auto count = SerialBT.readBytes(bleReadBuffer, BUFFER_SIZE);
      Serial.write(bleReadBuffer, count);
    }
    delay(20);
  }
}

void connection_state_changed(esp_a2d_connection_state_t state, void* ptr) {
    Serial.println(a2dp_sink.to_str(state));
}

void audio_state_changed(esp_a2d_audio_state_t state, void* ptr) {
    Serial.println(a2dp_sink.to_str(state));
}

void setup() {
    Serial.begin(115200);

    pinMode(13, INPUT);
    pinMode(14, INPUT);
    pinMode(15, INPUT);
    pinMode(16, INPUT);
    pinMode(17, INPUT);
    pinMode(18, INPUT);
    pinMode(19, INPUT);

  Serial.setRxBufferSize(BUFFER_SIZE);
  Serial.setTimeout(10);

  //Start BLE
  startBluetooth();

  //Disable watchdog timers
  disableCore0WDT();
  disableCore1WDT();
  disableLoopWDT();
  esp_task_wdt_delete(NULL);
  rtc_wdt_protect_off();
  rtc_wdt_disable();

  //Start tasks
  xTaskCreate(ReadSerialTask, "ReadSerialTask", 10240, NULL, 1, NULL);
  xTaskCreate(ReadBtTask, "ReadBtTask", 10240, NULL, 1, NULL);
      
    const i2s_config_t i2s_config = {
        .mode = (i2s_mode_t)(I2S_MODE_MASTER | I2S_MODE_TX | I2S_MODE_DAC_BUILT_IN),
        .sample_rate = 44100, // corrected by info from bluetooth
        .bits_per_sample = (i2s_bits_per_sample_t)16, /* the DAC module will only take the 8bits from MSB */
        .channel_format = I2S_CHANNEL_FMT_RIGHT_LEFT,
        .communication_format = (i2s_comm_format_t)I2S_COMM_FORMAT_STAND_MSB,
        .intr_alloc_flags = 0, // default interrupt priority
        .dma_buf_count = 8,
        .dma_buf_len = 64,
        .use_apll = false
    };

    a2dp_sink.set_i2s_config(i2s_config);
    a2dp_sink.set_on_connection_state_changed(connection_state_changed);
    a2dp_sink.set_on_audio_state_changed(audio_state_changed);
    a2dp_sink.start("Speaker");

}

void loop() {
  // put your main code here, to run repeatedly:
    int Volumeupstate;
    int Volumedownstate;
    int Playstate;
    int Pausestate;
    int Stopstate;
    int Nextstate;
    int Previousstate;

    Volumeupstate = digitalRead(13);
    Volumedownstate = digitalRead(14);
    Playstate = digitalRead(15);
    Pausestate = digitalRead(16);
    Stopstate = digitalRead(17);
    Nextstate = digitalRead(18);
    Previousstate = digitalRead(19);
    
    if ( Volumeupstate == HIGH) {
      digitalWrite(13, HIGH);
      Volume += VolumeIncrement;
      if(Volume > MaxVolume){
        Volume = MaxVolume;
      }
      Serial.println(Volume);

    }
    else if (Volumedownstate == HIGH) {
      digitalWrite(14, HIGH);
      Volume -= VolumeIncrement;
      if(Volume < MinVolume){
        Volume = MinVolume;
      }
      Serial.println(Volume);
    }
    else if (Playstate == HIGH) {
      digitalWrite(15, HIGH);
      a2dp_sink.play();
    }
    else if (Pausestate == HIGH) {
      digitalWrite(16, HIGH);
      a2dp_sink.pause();
    }
    else if (Stopstate == HIGH) {
      digitalWrite(17, HIGH);
      a2dp_sink.stop();
    }
    else if (Nextstate == HIGH) {
      digitalWrite(18, HIGH);
      a2dp_sink.next();
    }
    else if (Previousstate == HIGH) {
      digitalWrite(19, HIGH);
      a2dp_sink.previous();
    }
}

what i want to do is increase and decrease the volume using push button on esp32 when i am playing music on the Bluetooth to phone. I have a push button with 10k ohm connected on the breadboard. can someone please help me.

2

Not without further data.
What hardware do you have and how is it wired up? (schematic hand drawn fine Fritzing not)

Posting code that actually compiles would help as well.

3

let me edit my post here so you know what i am asking clearly

4

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