BLE detecting

BLE.swift

import CoreBluetooth

let kServiceUUID = CBUUID(string: "0000a000-0000-1000-8000-00805f9b34fb")
let kCharacteristicUUID = CBUUID(string: "0000a001-0000-1000-8000-00805f9b34fb")

let centralManager = CBCentralManager(delegate: self, queue: nil)
var foundDevice: CBPeripheral?

public func centralManagerDidUpdateState(central: CBCentralManager) {
    if centralManager.state == .PoweredOn {
        centralManager.scanForPeripheralsWithServices([kServiceUUID], options: nil)
    }
}

public func centralManager(central: CBCentralManager, didDiscoverPeripheral peripheral: CBPeripheral, 
                           advertisementData: [String : AnyObject], RSSI: NSNumber) {
    centralManager.stopScan()
    foundDevice = peripheral
    centralManager.connectPeripheral(foundDevice!, options: nil)
}

public func centralManager(central: CBCentralManager, didConnectPeripheral peripheral: CBPeripheral) {
    foundDevice?.delegate = self
    foundDevice?.discoverServices([kServiceUUID])
}

public func peripheral(peripheral: CBPeripheral, didDiscoverServices error: NSError?) {
    guard let services = peripheral.services where services.count > 0 else {
        return
    }
    for service in services {
        foundDevice?.discoverCharacteristics([kCharacteristicUUID], forService: service)
    }
}

public func peripheral(peripheral: CBPeripheral, didDiscoverCharacteristicsForService service: CBService, error: NSError?) {
    guard let characteristics = service.characteristics where characteristics.count > 0 else {
        return
    }
    for characteristic in characteristics {
        if characteristic.UUID == kCharacteristicUUID {
            foundDevice?.setNotifyValue(true, forCharacteristic: characteristic)
        }
    }
}

public func peripheral(peripheral: CBPeripheral, didUpdateValueForCharacteristic characteristic: CBCharacteristic, error: NSError?) {
    //characteristic изменилась. предположим, что значения характеристики - 0 и 1  
    var out: NSInteger = 0
    characteristic.value?.getBytes(&out, length: sizeof(NSInteger))
    if out == 1 {
        //произошло событие 1
    } else {
        //произошло событие 2
    }
}