藍牙外設卡在iOS的「連接」狀態

Question

我想連接到我使用BlueFruit BLE spi模塊的Arduino項目。嘗試使用我的iOS應用進行連接時遇到問題。在找到設備後，我試着連接它，但狀態卡在'連接'狀態= 1。這阻止我搜索服務，這樣，因爲「已連接」狀態沒有達到 下面是一個代碼剪斷......

//check state of the bluetooth on phone 
func centralManagerDidUpdateState(_ central: CBCentralManager) { 
    if central.state == .poweredOff{ 
     //TODO: ADD SAVE DATA TO REALM BEFORE DISSMISSING 
     errorView.isHidden = false 
    } 
    if central.state == .poweredOn{ 
     errorView.isHidden = true 
     //scan for peripherals with the service i created 
     central.scanForPeripherals(withServices: nil, options: nil) 
    } 
} 

//devices found(should only be ours because we will create Unique serviceID) 
func centralManager(_ central: CBCentralManager, didDiscover peripheral: CBPeripheral, advertisementData: [String : Any], rssi RSSI: NSNumber) { 
    // get advertisement data and check to make sure the name is matching. set it as the peripheral then make connection 
    if let peripheralName = advertisementData[CBAdvertisementDataLocalNameKey] as? String { 
     print("NEXT PERIPHERAL NAME: \(peripheralName)") 
     print("NEXT PERIPHERAL UUID: \(peripheral.identifier.uuidString)") 

    if peripheralName == nameID{ 
     manager.stopScan() 
     self.peripheralHalo = peripheral 
     peripheralHalo!.delegate = self 
     manager.connect(peripheral, options: nil) 

     while(peripheralHalo?.state.rawValue == 1) 
     { 
      if(manager.retrieveConnectedPeripherals(withServices: [serviceID]).count > 0){ 
       print("\(manager.retrieveConnectedPeripherals(withServices: [serviceID]))") 
      } 
     } 
    } 
     print("Connected!!") 
    } 

當我打電話manager.connect（外設，選擇：無），該外設嘗試連接。我添加以下while循環進行測試，並始終將狀態顯示爲「連接」。我已經嘗試了LightBlue iOS應用程序，並且我可以正確連接並接收特性值更改的通知，因此Arduino固件應該都很好。請幫助！

Answer 1

你不想那個while循環;這將阻止核心藍牙委託線程。發出connect後，您將收到一個致電didConnectCBCentralManagerDelegate方法。一旦連接了外設，您需要在外設上撥打discoverServices，這將回調外設代理方法。然後你可以用類似的方式發現特徵。

func centralManager(_ central: CBCentralManager, didDiscover peripheral: CBPeripheral, advertisementData: [String : Any], rssi RSSI: NSNumber) { 
// get advertisement data and check to make sure the name is matching. set it as the peripheral then make connection 
    if let peripheralName = advertisementData[CBAdvertisementDataLocalNameKey] as? String { 
     print("NEXT PERIPHERAL NAME: \(peripheralName)") 
     print("NEXT PERIPHERAL UUID: \(peripheral.identifier.uuidString)") 

     if peripheralName == nameID { 
      self.peripheralHalo = peripheral 
      central.stopScan() 
      central.connect(peripheral, options: nil) 
     } 
    } 
} 

func centralManager(_ central: CBCentralManager, 
       didConnect peripheral: CBPeripheral) { 
    print("Connected!!") 
    peripheralHalo!.delegate = self 
    peripheral.discoverServices([serviceID) 
} 

另外，如果你要存儲的東西，標識要連接到的周邊，我建議你使用標識符，而不能作爲名稱可以更改名稱。