Proximity sensor using BLE based on Service UUID

[hitzzer]

Hi,

I have proximity sensor using BLE. My code like this :

// Library 

// Library untuk bluetooth
#include "BLEDevice.h"

// Library untuk RFID
#include <SPI.h>
#include <MFRC522.h>

// Inisialisasi variabel bluetooth
static BLEAddress *pServerAddress;
BLEScan* pBLEScan;
BLEClient*  pClient;
bool deviceFound = false;
bool session = false;
bool BotonOff = false;
String knownAddresses[] = {"2d:1c:1f:c9:85:0a"};
unsigned long entry;

// Inisialisasi variabel RFID
String registered_rfid[] = {"4B 91 7D 00","49 31 B2 47"};

// Inisialisasi PIN RFID
#define SS_PIN 21
#define RST_PIN 22

#define RELAY_PIN 25
#define BUZZER_PIN 26
MFRC522 mfrc522(SS_PIN, RST_PIN);   // Create MFRC522 instance.

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);
}

class MyAdvertisedDeviceCallbacks: public BLEAdvertisedDeviceCallbacks {
    void onResult(BLEAdvertisedDevice Device){
      //Serial.print("BLE Advertised Device found: ");
      //Serial.println(Device.toString().c_str());
      pServerAddress = new BLEAddress(Device.getAddress()); 
      bool known = false;
      bool Master = false;
      for (int i = 0; i < (sizeof(knownAddresses) / sizeof(knownAddresses[0])); i++) {
        if (strcmp(pServerAddress->toString().c_str(), knownAddresses[i].c_str()) == 0) 
          known = true;
      }
      if (known) {
        Serial.print("Device found: ");
        Serial.println(Device.getRSSI());
        if (Device.getRSSI() > -60) {
          deviceFound = true;
        }
        else {
          deviceFound = false;
        }
        Device.getScan()->stop();
        delay(100);
      }
    }
};

void setup() {
  Serial.begin(115200);
  pinMode(LED_BUILTIN,OUTPUT);
  pinMode(RELAY_PIN, OUTPUT);
  pinMode(BUZZER_PIN, OUTPUT);
  BLEDevice::init("");
  pClient  = BLEDevice::createClient();
  pBLEScan = BLEDevice::getScan();
  pBLEScan->setAdvertisedDeviceCallbacks(new MyAdvertisedDeviceCallbacks());
  pBLEScan->setActiveScan(true);
  Serial.println("Done");
  SPI.begin();      // Initiate  SPI bus
  mfrc522.PCD_Init();   // Initiate MFRC522
  Serial.println("Approximate your card to the reader...");
  Serial.println();
}

void Bluetooth() {
  Serial.println();
  Serial.println("BLE Scan restarted.....");
  deviceFound = false;
  BLEScanResults scanResults = pBLEScan->start(1);
  if (deviceFound) {
      session = true;
      digitalWrite(BUZZER_PIN, HIGH);
      delay(200);
      digitalWrite(BUZZER_PIN, LOW);
      digitalWrite(BUZZER_PIN, HIGH);
      delay(200);
      digitalWrite(BUZZER_PIN, LOW);    
  }
}


void Rfid() {

    // Look for new cards
    if ( ! mfrc522.PICC_IsNewCardPresent()) 
    {
      return;
    }
    // Select one of the cards
    if ( ! mfrc522.PICC_ReadCardSerial()) 
    {
      return;
    }
    
    String content= "";
    byte letter;
    for (byte i = 0; i < mfrc522.uid.size; i++) 
    {
       content.concat(String(mfrc522.uid.uidByte[i] < 0x10 ? " 0" : " "));
       content.concat(String(mfrc522.uid.uidByte[i], HEX));
    }
    Serial.println();
    content.toUpperCase();
  
    // Cek apakah kartu terdaftar atau tidak
    for (int x=0; x<(sizeof(registered_rfid) / sizeof(registered_rfid[0])); x++){
      if (content.substring(1) == registered_rfid[x]) //change here the UID of the card/cards that you want to give access
      {
        Serial.println("Authorized access");
        Serial.println(content.substring(1));
        session = true;    
      }
    }  

}

void loop() { 
  if (session == false) {
    Bluetooth();
  }
  
  if (session == false) {
    Rfid();
  }
  
  
  if (session == true) {
    digitalWrite(LED_BUILTIN,HIGH);
    digitalWrite(RELAY_PIN, HIGH);
  }
}

That code works fine, but that code based on bluetooth address. The problem is, my bluetooth server address are dynamically changes. So, how do I change the code so that it's based on the service uuid instead of the address?