Question

现在已经有几年时间，Microchip发布了具有私有MLDP配置文件的RN4020 BT LE芯片。然而，尽管他们在Apple App Store中拥有iOS应用程序，但仍然没有可用的公共可用iOS示例源代码。有没有人有任何工作代码并愿意分享/发布它？

谢谢！

添

Answer 1

我有一些工作代码。我会在这里给出一些片段。在第一个符合我们CBCentralManagerDelegate的ViewController中：

var cbc : CBCentralManager? = nil

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

触摸按钮开始扫描外围设备

@IBAction func scan(_ sender: Any) {
    cbc?.scanForPeripherals(withServices: nil, options: nil)
}

找到每个外围设备的

将调用以下代理成员

func centralManager(_ central: CBCentralManager, didDiscover peripheral: CBPeripheral, advertisementData: [String : Any], rssi RSSI: NSNumber) {
    // store peripherals here to let select user one
    NSLog("name=%@", peripheral.name ?? "unnamed")
}

我们将外围设备存储在字典中，并使用表格视图向用户显示其名称。如果用户选择外围设备，我们会尝试连接到

@IBAction func connect(_ sender: Any) {
    // selectedPeripheral set by selection from the table view
    cbc?.connect(selectedPeripheral!, options: nil)
}

成功连接将导致调用以下委托方法：

func centralManager(_ central: CBCentralManager, didConnect peripheral: CBPeripheral) {
    performSegue(withIdentifier: "ConnectPeriph", sender: self)
}

导致第二个ViewController负责连接状态。此ViewController符合CBPeripheralDelegate协议并声明以下变量：

var periph : CBPeripheral!  // selected peripheral
var dataChar : CBCharacteristic?  // characteristic for data transfer

let mchpPrivateService : CBUUID = CBUUID(string: "00035B03-58E6-07DD-021A-08123A000300")
let mchpDataPrivateChar : CBUUID = CBUUID(string: "00035B03-58E6-07DD-021A-08123A000301")

连接后的第一个动作是发现外围设备提供的服务：

override func viewDidAppear(_ animated: Bool) {
    super.viewDidAppear(animated)

    periph.delegate = self
    periph.discoverServices(nil)
}

这导致调用此委托方法：

func peripheral(_ peripheral: CBPeripheral, didDiscoverServices error: Error?) {
    if let e = error {
        NSLog("Error %@", e.localizedDescription)
    }
    else if let services = peripheral.services {
        for s in services {
            NSLog("Service=%@", s.uuid.uuidString)
            if s.uuid.isEqual(mchpPrivateService) {
                peripheral.discoverCharacteristics(nil, for: s)
            }
        }
    }
}

反过来导致发现特征：

func peripheral(_ peripheral: CBPeripheral, didDiscoverCharacteristicsFor service: CBService, error: Error?) {
    NSLog("characteristics for service %@", service.uuid.uuidString)
    if let characteristics = service.characteristics {
        for c in characteristics {
            if c.uuid.isEqual(mchpDataPrivateChar) {
                peripheral.setNotifyValue(true, for: c)
                dataChar = c
            }
        }
    }
}

我们感兴趣的唯一特征是使用uuid mchpDataPrivateChar。通知请求导致调用：

func peripheral(_ peripheral: CBPeripheral, didUpdateValueFor characteristic: CBCharacteristic, error: Error?) {
    NSLog("update value for %@", characteristic.uuid)
    if let d = characteristic.value {
        var s : String = String()
        for b in d {
            s.append(Character(UnicodeScalar(b)))
        }
        NSLog("received \(d.count) bytes: \(s)")
    }
}

完成了iOS端的接收器。发送字节通过以下方式完成：

@IBAction func sendClicked(_ sender: Any) {
    if let d = dataChar, let s=sendEdit.text {
        let buffer : [UInt8] = Array(s.utf8)
        let data : Data = Data(buffer)
        periph.writeValue(data, for: d, type: .withResponse)
    }
}

Microchip RN4020 - ＆gt; MLDP模式iOS示例代码

1 个答案: