`/**
`   A BLE client example that is rich in capabilities.
`*/
`
`#include "BLEDevice.h"
`//#include "BLEScan.h"
`
`//The remote device (peripheral) we wish to connect
`#define peripheralAddr "c4:be:84:71:39:84"
`// The remote service we wish to connect to.
`//static BLEUUID serviceUUID("91bad492-b950-4226-aa2b-4ede9fa42f59");
`static BLEUUID serviceUUID("f000aa00-0451-4000-b000-000000000000");
`// The characteristic of the remote service we are interested in.
`static BLEUUID    charUUID("f000aa01-0451-4000-b000-000000000000");
`
`static BLEAddress *pServerAddress;
`static BLEAddress *pPeripheralAddr;
`static boolean doConnect = false;
`static boolean characteristicFound = false;
`static boolean connected = false;
`static BLERemoteCharacteristic* pRemoteCharacteristic;
`
`static void notifyCallback(
`  BLERemoteCharacteristic* pBLERemoteCharacteristic,
`  uint8_t* pData,
`  size_t length,
`  bool isNotify) {
`  Serial.print("Notify callback for characteristic ");
`  Serial.print(pBLERemoteCharacteristic->getUUID().toString().c_str());
`  Serial.print(" of data length ");
`  Serial.println(length);
`}
`
`void connectToServer(BLEAddress pAddress)
`{
`  delay(50); /*--D- -(-6-293--)- -B-LE-U--t-i-l-s : coRennceecivtTeodS ae rvGeAPr  -e-ve--n-t-: --E-S-P-_-GA--P-_-B-LE--_-S-C-A-N-_S--TO--P-_C-O--M-P-L-E-T-E-_E--VT-<\r>-<\n>
`  -D-- -(6--3-0-7<\r>)<\n>
`*/
`  //Serial.println("----------------- connectToServer ------------------------------");
`  Serial.print("Forming a connection to:");
`  Serial.println(pAddress.toString().c_str());
`
`  BLEClient*  pClient  = BLEDevice::createClient();
`  Serial.println(" - Created client");
`
`  // Connect to the remove BLE Server.
`  pClient->connect(pAddress);
`  Serial.println(" - Connected to server");
`
`  // Obtain a reference to the service we are after in the remote BLE server.
`  BLERemoteService* pRemoteService = pClient->getService(serviceUUID);
`  if (pRemoteService == nullptr)
`  {
`    Serial.print("Failed to find our service UUID: ");
`    Serial.println(serviceUUID.toString().c_str());
`    return;
`  }
`  else
`  {
`    Serial.println("----------------- Found your service ------------------------");
`  }
`
`
`  // Obtain a reference to the characteristic in the service of the remote BLE server.
`  pRemoteCharacteristic = pRemoteService->getCharacteristic(charUUID);
`  if (pRemoteCharacteristic == nullptr) {
`    Serial.print("Failed to find our characteristic UUID: ");
`    Serial.println(charUUID.toString().c_str());
`    return;
`  }
`  else
`  {
`    Serial.println("----------------- Found your characteristic ------------------------");
`    characteristicFound = true;
`  }
`
`  // Read the value of the characteristic.
`  std::string value = pRemoteCharacteristic->readValue();
`  Serial.print("The characteristic value was: ");
`  Serial.println(value.c_str());
`
`  pRemoteCharacteristic->registerForNotify(notifyCallback);
`}
`/**
`   Scan for BLE servers and find the first one that advertises the service we are looking for.
`*/
`class MyAdvertisedDeviceCallbacks: public BLEAdvertisedDeviceCallbacks {
`    /**
`        Called for each advertising BLE server.
`    */
`    void onResult(BLEAdvertisedDevice advertisedDevice)
`    {
`      //some infos and use of methods
`      Serial.println("----------------------------------------------------------------------");
`      Serial.print("BLE Advertised Device found: [");
`      Serial.println(advertisedDevice.toString().c_str());
`      Serial.print("]\nAddress: [");
`      Serial.print(advertisedDevice.getAddress().toString().c_str());
`      Serial.print("]\nName: [");
`      Serial.print(advertisedDevice.getName().c_str());
`      Serial.print("]\nManufacturerData: [");
`      Serial.print(advertisedDevice.getManufacturerData().c_str());
`      Serial.print("]\nServiceUUID: [");
`      Serial.print(advertisedDevice.getServiceUUID().toString().c_str());
`      Serial.print("]\nRSSI: [");
`      Serial.print(advertisedDevice.getRSSI());
`      Serial.print("]\nTXPower: [");
`      Serial.print(advertisedDevice.getTXPower());
`      Serial.print("]\nAppearance: [");
`      Serial.print(advertisedDevice.getApperance()); //misspelled ? Appearance
`      Serial.println("]");
`
`      // We have found a device, let us now see if it contains the devieceAddress we are looking for.
`      if (advertisedDevice.getAddress().equals(*pPeripheralAddr))
`      {
`        pServerAddress = new BLEAddress(advertisedDevice.getAddress());
`        Serial.println("*******************************************************************");
`        Serial.println("Found matching device!");
`        advertisedDevice.getScan()->stop();
`        doConnect = true;
`
`      } // Found our server
`    } // onResult
`}; // MyAdvertisedDeviceCallbacks
`
`
`void setup() {
`  Serial.begin(115200);
`  Serial.println("Starting Arduino BLE Client application...");
`
`  pPeripheralAddr = new BLEAddress(peripheralAddr);
`
`  BLEDevice::init("");
`
`  // Retrieve a Scanner and set the callback we want to use to be informed when we
`  // have detected a new device.  Specify that we want active scanning and start the
`  // scan to run for 30 seconds.
`  BLEScan* pBLEScan = BLEDevice::getScan();
`  pBLEScan->setAdvertisedDeviceCallbacks(new MyAdvertisedDeviceCallbacks());
`  pBLEScan->setActiveScan(true);
`  pBLEScan->start(30);
`} // End of setup.
`
`
`// This is the Arduino main loop function.
`void loop() {
`
`  // If the flag "doConnect" is true then we have scanned for and found the desired
`  // BLE Server with which we wish to connect.  Now we connect to it.  Once we are
`  // connected we set the connected flag to be true.
`  if (doConnect == true) {
`    connectToServer(*pServerAddress); //this internal reads the GATT
`    doConnect = false;
`    connected = true;
`  }
`
`  // If we are connected to a peer BLE Server, update the characteristic each time we are reached
`  // with the current time since boot.
`  if (connected)
`  {
`    Serial.println("----------------- still connected ------------------------");
`    String newValue = "Time since boot: " + String(millis() / 1000);
`
`    if (characteristicFound == true)
`    {
`      Serial.println("Setting new characteristic value to \"" + newValue + "\"");
`      // Set the characteristic's value to be the array of bytes that is actually a string.
`      pRemoteCharacteristic->writeValue(newValue.c_str(), newValue.length());
`    }
`  }
`
`  delay(1000); // Delay a second between loops.
`} // End of loop