ios - Microchip RN4020 -> MLDP模式iOS示例代码

Question

Microchip 发布具有私有(private) MLDP 配置文件的 RN4020 BT LE 芯片已经有好几年了。然而，到目前为止，仍然没有公开可用的 iOS 示例源代码可用，尽管他们在 Apple App Store 中有一个 iOS 应用程序。有没有人有任何工作代码并愿意分享/发布它？

谢谢!

蒂姆

Answer 1

我有一些工作代码。我会在这里给出一些片段。在符合 CBCentralManagerDelegate 的第一个 ViewController 中，我们有:

var cbc : CBCentralManager? = nil

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

触摸一个按钮开始扫描外围设备

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

对于找到的每个外围设备，将调用以下委托(delegate)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 View 将其名称呈现给用户。如果用户选择了一个外设，我们会尝试连接到它

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

成功的连接将调用以下委托(delegate)方法:

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

这导致第二个 ViewController 负责连接状态。此 ViewController 符合 CBPeripheralDelegate 协议(protocol)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 Action 是发现外设提供的服务:

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

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

这导致调用此委托(delegate)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)
            }
        }
    }
}

这反过来会导致发现特征:

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
            }
        }
    }
}

我们唯一感兴趣的特征是具有 uuid 的 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)")
    }
}

这就完成了 iOS 端的接收器。通过以下方式发送字节:

@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)
    }
}