Pulse Oximeter communication with ESP32

#include <BLEDevice.h>
#include <BLEUtils.h>
#include <BLEScan.h>
#include <BLEAdvertisedDevice.h>
#define SCAN_TIME  60 // seconds
static BLEUUID serviceUUID("49535343-fe7d-4ae5-8fa9-9fafd205e455");
static BLEUUID    charUUID("49535343-1e4d-4bd9-ba61-23c647249616"); 
String My_BLE_Address = "00:a0:50:c2:23:de"; 
static BLERemoteCharacteristic* pRemoteCharacteristic;
BLEScan* pBLEScan; //Name the scanning device as pBLEScan
BLEScanResults foundDevices;

static BLEAddress *Server_BLE_Address;
String Scaned_BLE_Address;

class MyAdvertisedDeviceCallbacks : public BLEAdvertisedDeviceCallbacks {
    void onResult(BLEAdvertisedDevice advertisedDevice)
    {
      Server_BLE_Address=new BLEAddress(advertisedDevice.getAddress());
      Scaned_BLE_Address = Server_BLE_Address->toString().c_str();
      Serial.print("Found Device Address:");
      Serial.println( Scaned_BLE_Address);
        if (advertisedDevice.haveServiceData() && Scaned_BLE_Address==My_BLE_Address) {
            std::string strServiceData = advertisedDevice.getServiceData();
            uint8_t cServiceData[100];
            char charServiceData[100];

            strServiceData.copy((char *)cServiceData, strServiceData.length(), 0);

            Serial.printf("\n\nAdvertised Device: %s\n", advertisedDevice.toString().c_str());

            for (int i=0;i<strServiceData.length();i++) {
                Serial.printf(&charServiceData[i*2], "%02x", cServiceData[i]);
            }
        }
    }
};
void setup() {
  Serial.begin(115200);
 // BLE init and setting
    BLEDevice::init("");
    pBLEScan = BLEDevice::getScan(); //create new scan
    pBLEScan->setAdvertisedDeviceCallbacks(new MyAdvertisedDeviceCallbacks());
    pBLEScan->setActiveScan(true); //active scan uses more power, but get results faster
    pBLEScan->setInterval(0x50);
    pBLEScan->setWindow(0x30);

}

void loop() {
   BLEScanResults foundDevices = pBLEScan->start(SCAN_TIME);
    int count = foundDevices.getCount();
    Serial.printf("Found device count : %d\n", count);
    Serial.println();
}