在某些 iOS 台设备中无法连接到 BLE 外围设备

Question

BLE 在 7 Plus (iOS 14.4.2) 和 6 (iOS 12) 上运行良好。但是在 XR (14.4.2) 上，11 连接卡在 centralManager.connect(peripheral, options: nil)（无限连接）

之后

外设处于连接模式，因为其他智能手机无法检测到它。一开始以为是外围设备本身的radio模块（NRF52）的问题，但是调试板也出现了问题。重新启动智能手机没有帮助。有趣的是，该应用程序在配备 M1 芯片的 MacBook 上运行良好

部分代码：

// Peripheral model

init(withPeripheral peripheral: CBPeripheral, advertisementData advertisementDictionary: [String : Any], andRSSI currentRSSI: NSNumber, using manager: CBCentralManager) {
    centralManager = manager
    basePeripheral = peripheral
    RSSI = currentRSSI
    super.init()
    advertisedName = parseAdvertisementData(advertisementDictionary)
    basePeripheral.delegate = self
}

public func connect() {
    centralManager.delegate = self
    centralManager.connect(basePeripheral, options: nil)
    print("Connecting to \(advertisedName ?? "device")...") 
// logs stops here
}

public func disconnect() {
    centralManager.cancelPeripheralConnection(basePeripheral)
    print("Cancelling connection with \(advertisedName ?? "device")...")
// triggers on VC dismiss
}

func centralManagerDidUpdateState(_ central: CBCentralManager) {
    if central.state != .poweredOn {
        print("Central Manager stated changed to \(central.state)")
    }
}

func centralManager(_ central: CBCentralManager, didConnect peripheral: CBPeripheral) {
    if peripheral == basePeripheral {
        print("Connected to \(advertisedName ?? "device")")
        delegate?.peripheralDidConnect()
        discoverPrimaryServices()
    }
}

func centralManager(_ central: CBCentralManager, didDisconnectPeripheral peripheral: CBPeripheral, error: Error?) {
    if peripheral == basePeripheral {
        print("Disconnected from \(advertisedName ?? "device")")
        delegate?.peripheralDidDisconnect()
    }
}

Answer 1

“外设处于连接模式，因为其他智能手机无法检测到它。”您是说其他智能手机可以检测到它吗？

鉴于您列为工作和不工作的手机，我预计您的开发板在蓝牙 5 方面存在问题（iPhone 8 首次支持蓝牙 5）。 NRF52 支持 BT5（它支持 5.2），但如果您编写了自己的固件，则可能会破坏支持。首先，我要确保您是运行最原始的北欧代码。

在某些 iOS 台设备中无法连接到 BLE 外围设备

Can't connect to BLE Peripheral in some iOS devices

ios

core-bluetooth

bluetooth-lowenergy

cbcentralmanager

swift