TL;DR

An iBeacon Broadcastor

Intro

iBeacon

• A protocol developed by Apple
• A Bluetooth low energy (BLE) device as Beacon
• Beacon broadcasts information

iDevices of iBeacon supported

• iPhone4S or later
• 3rd generation iPad or later
• iPad Mini or later
• 5th generation iPod touch or later

BLE Advertising Packet

Preamble 1Byte	Address 4Bytes	Protocol Data Unit <=39Bytes		CRC 3Bytes
		Header 2Bytes	Payload 0 ~ 37Bytes

Payload

Field	Size
UUID	16 bytes
Major	2 bytes
Minor	2 bytes

Example

Store Location		San Francisco	Paris	London
UUID		D9B9EC1F-3925-43D0-80A9-1E39D4CEA95C
Major		1	2	3
Minor	Clothing	10	10	10
	Housewares	20	20	20
	Automotive	30	30	30

Programing

Privacy Permission Settings

• NSBluetoothPeripheralUsageDescription

Check Bluetooth

override func viewDidLoad() {
    super.viewDidLoad()
    peripheralManager = CBPeripheralManager()
    peripheralManager.delegate = self
}

extension BeaconBroadcaster: CBPeripheralManagerDelegate {
    func peripheralManagerDidUpdateState(_ peripheral: CBPeripheralManager) {

        btEnable = false

        switch peripheral.state {
        case .poweredOff:
            print("poweredOff")
        case .poweredOn:
            print("poweredOn")
            btEnable = true
        case .resetting:
            print("resetting")
        case .unauthorized:
            print("unauthorized")
        case .unsupported:
            print("unsupported")
        case .unknown:
            print("unknown")
        }
    }
}

Start to broadcast

let beaconUuid = UUID(uuidString: defaultUuid)!

let major: CLBeaconMajorValue = 94
let minor: CLBeaconMinorValue = 87
let beaconID = "tw.cowbjt.beacon"

let region = CLBeaconRegion(proximityUUID: beaconUuid, major: major, minor: minor, identifier: beaconID)

let peripheralData = region.peripheralData(withMeasuredPower: nil)

peripheralManager.startAdvertising(((peripheralData as NSDictionary) as! [String : Any]))

Stop broadcasting

peripheralManager.stopAdvertising()

Reference

1. Turning an iOS Device into an iBeacon