Setup CBCentralManager

ViewController

override func viewDidLoad() {
super.viewDidLoad()
   //Start manager
   cbCentralManager = CBCentralManager(delegate: self, queue: nil)
}
extension ViewController :  CBCentralManagerDelegate {
func centralManagerDidUpdateState(_ central: CBCentralManager) {
 if central.state == .poweredOn {
   central.scanForPeripherals(withServices: nil, options: nil)
   print("Scanning...")
  }
}