How to discover Bluetooth Classic device in iOS 13 using Core bluetooth Framework [duplicate]

Question

I am trying to discover Bluetooth LE and Classic (BR/EDR) device using Core Bluetooth framework in my app which is running on iOS-13. But I am able to find only BLE devices.

How I can scan for Bluetooth Classic devices?

After initialising CBCentralManager and getting the state of CentralManager as powered on, I am scanning for peripheral devices by passing nil in Services and Options.

Code mentioned below :-

private var cbManager: CBCentralManager!

override func viewDidLoad() {
     super.viewDidLoad()
     cbManager = CBCentralManager(delegate: self, queue: nil)
}

func centralManagerDidUpdateState(_ central: CBCentralManager) {
     switch central.state {
        case .poweredOn:
             cbManager.scanForPeripherals(withServices: nil, options:nil)

        default:
             os_log("Cleaning up cbManager")
     }
}


func centralManager(_ central: CBCentralManager, didDiscover peripheral: CBPeripheral, advertisementData: [String : Any], rssi RSSI: NSNumber) {

     if let name = peripheral.name {
         print(name)
     }
}

Through this I am only getting BLE devices. Expected result should be : BLE and Classic(BR/EDR) devices list.

Answer 1

Inside your .powerOn add this to be able to match on a specific service UUID.

let matchingOptions = [CBConnectionEventMatchingOption.serviceUUIDs: [uuid-to-classic-bt-device]]
            cbManager.registerForConnectionEvents(options: matchingOptions)

Then in the delegate method centralManager:connectionEventDidOccur:forPeripheral: you can check for the events .peerDisconnected and .peerConnected to do something with the peripheral you found.

Apple provides an example of this Using Core Bluetooth Classic