ESP32C3 BLE Address

[deepakreddyracedynamics]

Hello,

Hardware: ESP32 C3 WROOM 02 N4
IDE: Arduino 1.8.18
Question: How do I retrieve ESP32's BLE Address?

I'm using the Example Arduino Project "BLE_uart" and everything is working fine. I want to send ESP32's BLE Address on uart so what command/function do I use?

In "BLEDevice.h" header file there is a function "static BLEAddress getAddress(); // Retrieve our own local BD address." so I'm assuming this retrieves the BLE Address but how do I call this function?

I'm able to get ESP32's WiFi MAC Address by using this "Serial.println( WiFi.macAddress( ) );" so any similar command for BLE Address?

My code is as below:

/*
    Video: https://www.youtube.com/watch?v=oCMOYS71NIU
    Based on Neil Kolban example for IDF: https://github.com/nkolban/esp32-snippets/blob/master/cpp_utils/tests/BLE%20Tests/SampleNotify.cpp
    Ported to Arduino ESP32 by Evandro Copercini

   Create a BLE server that, once we receive a connection, will send periodic notifications.
   The service advertises itself as: 6E400001-B5A3-F393-E0A9-E50E24DCCA9E
   Has a characteristic of: 6E400002-B5A3-F393-E0A9-E50E24DCCA9E - used for receiving data with "WRITE"
   Has a characteristic of: 6E400003-B5A3-F393-E0A9-E50E24DCCA9E - used to send data with  "NOTIFY"

   The design of creating the BLE server is:
   1. Create a BLE Server
   2. Create a BLE Service
   3. Create a BLE Characteristic on the Service
   4. Create a BLE Descriptor on the characteristic
   5. Start the service.
   6. Start advertising.

   In this example rxValue is the data received (only accessible inside that function).
   And txValue is the data to be sent, in this example just a byte incremented every second.
*/
#include <BLEDevice.h>
#include <BLEServer.h>
#include <BLEUtils.h>
#include <BLE2902.h>
#include <WiFi.h>

BLEServer *pServer = NULL;
BLECharacteristic * pTxCharacteristic;
bool deviceConnected = false;
bool oldDeviceConnected = false;
uint8_t txValue[50] = "Hello World!";

// See the following for generating UUIDs:
// https://www.uuidgenerator.net/

#define SERVICE_UUID           "6E400001-B5A3-F393-E0A9-E50E24DCCA9E" // UART service UUID
#define CHARACTERISTIC_UUID_RX "6E400002-B5A3-F393-E0A9-E50E24DCCA9E"
#define CHARACTERISTIC_UUID_TX "6E400003-B5A3-F393-E0A9-E50E24DCCA9E"

class MyServerCallbacks: public BLEServerCallbacks
{
    void onConnect( BLEServer* pServer )
    {
        deviceConnected = true;
    };

    void onDisconnect( BLEServer* pServer ) 
    {
        deviceConnected = false;
    }
};

class MyCallbacks: public BLECharacteristicCallbacks 
{
    void onWrite( BLECharacteristic *pCharacteristic ) 
    {
        std::string rxValue = pCharacteristic->getValue( );
        if( rxValue.length( ) > 0 ) 
        {
            Serial.println( "*********" );
            Serial.print( "Received Value: " );
            for( int j = 0; j < 50; j++ )
            {
                txValue[ j ] = 0;
            }
            int i = 0;
            for( i = 0; i < rxValue.length( ); i++ )
            {
                Serial.print( rxValue[ i ] );
                txValue[ i ] = rxValue[ i ];
            }
            i = i - 2;
            txValue[ i++ ] = '<';
            txValue[ i++ ] = '-';
            txValue[ i++ ] = 'E';
            txValue[ i++ ] = 'S';
            txValue[ i++ ] = 'P';
            txValue[ i++ ] = '3';
            txValue[ i++ ] = '2';
            txValue[ i++ ] = '\r';
            txValue[ i++ ] = '\n';
            Serial.println( );
            Serial.println( "*********" );
        }
    }
};

void setup( ) 
{
    Serial.begin( 115200 );
    // Create the BLE Device
    BLEDevice::init( "UART Service" );
    // Create the BLE Server
    pServer = BLEDevice::createServer( );
    pServer->setCallbacks( new MyServerCallbacks( ) );
    // Create the BLE Service
    BLEService *pService = pServer->createService( SERVICE_UUID );
    // Create a BLE Characteristic
    pTxCharacteristic = pService->createCharacteristic
                        (
                            CHARACTERISTIC_UUID_TX,
                            BLECharacteristic::PROPERTY_NOTIFY
                        );
    pTxCharacteristic->addDescriptor( new BLE2902( ) );
    BLECharacteristic * pRxCharacteristic = pService->createCharacteristic
                        (
                            CHARACTERISTIC_UUID_RX,
                            BLECharacteristic::PROPERTY_WRITE
                        );
    pRxCharacteristic->setCallbacks( new MyCallbacks( ) );
    // Start the service
    pService->start( );
    // Start advertising
    pServer->getAdvertising( )->start( );
    Serial.println( "Waiting a client connection to notify..." );
    Serial.println( WiFi.macAddress( ) );
}

void loop( ) 
{
    volatile uint8_t i = 0;
    volatile uint8_t j = 0;

    if( deviceConnected )
    {
      if( 0 != txValue[ 0 ] )
      {
        for ( i = 0; i < 50; i++ )
        {
          if ( 0 != txValue[ i ] )
          {
            j++;
          }
        }
        pTxCharacteristic->setValue( &txValue[ 0 ], j );
        pTxCharacteristic->notify( );
        //txValue++;
        txValue[ 0 ] = 0;
        delay( 10 ); // bluetooth stack will go into congestion, if too many packets are sent
      }
    }
    // disconnecting
    if( !deviceConnected && oldDeviceConnected ) 
    {
        delay( 500 ); // give the bluetooth stack the chance to get things ready
        pServer->startAdvertising( ); // restart advertising
        Serial.println( "start advertising" );
        oldDeviceConnected = deviceConnected;
    }
    // connecting
    if( deviceConnected && !oldDeviceConnected ) 
    {
      // do stuff here on connecting
      oldDeviceConnected = deviceConnected;
    }
}

Regards,
Deepak.

[UKHeliBob]

Your topic was MOVED to its current forum category which is more appropriate than the original as it not an Introductory Tutorial