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   BLEDevice::init("");
   pBLEScan = BLEDevice::getScan(); //create new scan
   if (pBLEScan)
   {
      pBLEScan->setAdvertisedDeviceCallbacks(new MyAdvertisedDeviceCallbacks());
      pBLEScan->setActiveScan(true); //set passive scan; active scan uses more power, but get results faster
      pBLEScan->setInterval(100);
      pBLEScan->setWindow(99);  // less or equal setInterval value
      BLEScanResults foundDevices = pBLEScan->start(5,false);
      pBLEScan->stop();
      pBLEScan->clearResults();   // delete results fromBLEScan buffer to release memory
      delete pBLEScan;
      pBLEScan=0;
   }
   BLEDevice::deinit(true);