BluetoothManager.swift

import CoreBluetooth

class BluetoothManager: NSObject {
    private let centralManager = CBCentralManager()
    
    private let uuids: [CBUUID] = [.init(string: "EXAMPLE-UUID-1"),
                                   .init(string: "EXAMPLE-UUID-2")]
    
    override init() {
        super.init()
        centralManager.delegate = self
    }
}

extension BluetoothManager: CBCentralManagerDelegate {
    func centralManagerDidUpdateState(_ central: CBCentralManager) {
        // Make sure the central manager is powered on.
        guard central.state == .poweredOn else { return }
        // We only scan for the listed UUIDs.
        central.scanForPeripherals(withServices: uuids, options: nil)
    }
    
    func centralManager(_ central: CBCentralManager,
                        didDiscover peripheral: CBPeripheral,
                        advertisementData: [String : Any],
                        rssi RSSI: NSNumber) {
        // Only connect to peripherals with names and manufacturer data.
        guard let name = peripheral.name ?? advertisementData[CBAdvertisementDataLocalNameKey] as? String,
              let data = advertisementData[CBAdvertisementDataManufacturerDataKey] as? Data,
              name != "FORBIDDEN-NAME",
              !data.isEmpty else { return }
        
        central.connect(peripheral, options: nil)
    }
}