将 LE 蓝牙从 samsung watch active wearable app 连接到 raspberry pi，并向其发送 gattservice

Question

我正在为 Samsung galaxy watch active 在 Tizen.net 框架上开发可穿戴应用程序，以便与 raspberry pi 进行通信。当触发按钮方法时，可穿戴设备连接到给定（硬编码）的蓝牙地址，并通过 GATT 请求（尚未实现 GATT 部分）向该地址发送一个整数。但是，我的可穿戴设备找不到我要查找的地址，因此无法连接到 raspberry pi 上的蓝牙，仅供参考，我在 python 2.7.[=12 上使用 raspberry pi 3+ =]

我尝试在 VS 上调试，但它抛出了一个分段错误。

static BluetoothGattClient client = null;
static bool StateChanged_flag = false;
public static string remote_addr = ("B8:27:EB:DC:D9:EC");
public static BluetoothLeDevice leDevice = null;



//Here is my buttonClick method that should trigger the connection. 
private async void ConnectBrewer_Clicked(object sender, EventArgs e)
    {
        try
        {
            if (!BluetoothAdapter.IsBluetoothEnabled)
            {
                Toast.DisplayText("Please turn on Bluetooth.");
            }
            else
            {
                ConnectBrewer.IsEnabled = false;
                BluetoothAdapter.ScanResultChanged += scanResultEventHandler;
                if (leDevice == null)
                {
                    BluetoothAdapter.StartLeScan();
                    await WaitScanFlag();
                    BluetoothAdapter.StopLeScan();
                    ConnectBrewer.IsEnabled = true;

                }

                else
                {
                    ConnectBrewer.Text = "Found";
                    ConnectBrewer.IsEnabled = false;
                    index_Page.Children[2].IsVisible = true;
                    index_Page.CurrentPage = index_Page.Children[2];
                    leDevice.GattConnectionStateChanged += LeDevice_GattConnectionStateChanged;
                    client = leDevice.GattConnect(false);
                    ConnectBrewer.Text = "Connected!";
                }

            }
        }
        catch (Exception ex)
        {
            Toast.DisplayText("Error: " + ex.Message);
        }
    }

public async Task WaitScanFlag()

    {
        int count = 0;
        do
        {
            await Task.Delay(3000);
            if (count % 4 == 0)
            { 

            }
            count++;

        } while (count < 10 && !scanFlag);

    }
public static void scanResultEventHandler(object sender, AdapterLeScanResultChangedEventArgs e)
    {

        int txLevel;
        int rssi;
        BluetoothError result;
        string address;
        BluetoothLePacketType PacketType;

        if (!e.DeviceData.Equals(null) && e.DeviceData.RemoteAddress.Equals(remote_addr))
        {
//Here is where I am setting my leDevice object,based on the remote address, but the if statement conditions are never true. 
               leDevice = e.DeviceData;
            result = e.Result;
            scanFlag = true;
        }

    }
public static void LeDevice_GattConnectionStateChanged(object sender, GattConnectionStateChangedEventArgs e)
    {
        if (e.Result != (int)BluetoothError.None)
        {
            StateChanged_flag = false;
        }
        else if (!e.RemoteAddress.Equals(remote_addr))
        {
            StateChanged_flag = false;
        }
        else if (e.IsConnected.Equals(false))
        {
            StateChanged_flag = false;
        }
        else
        {
            StateChanged_flag = true;
        }
    }

我希望它能根据远程地址找到设备，但 ledevice 仍然为 null 并且永远不会更新，从而触发了分段错误。如何根据预先给定的地址进行连接？

Answer 1

我们可以针对此问题检查 2 项内容。

地址的字符串值
- 可能是地址中的( )引起的。所以请删除 ( ) ，然后重新测试。 public static string remote_addr = "B8:27:EB:DC:D9:EC";
远程设备 (RPI3) 不在广告中。所以真的没有搜。
- 首先，使用 android 的应用程序（nRF 连接），尝试扫描您的 RPI3。并检查它是否也在手机中被扫描。
- 然后，进入银河手表shell。使用低层扫描工具扫描。

sdb root on
sdb shell
hcitool lescan
LE Scan ...
E4:DB:6D:62:4B:09 (unknown)
E4:DB:6D:62:4B:09 (unknown)
B8:BB:AF:C2:7B:1D (unknown)

将 LE 蓝牙从 samsung watch active wearable app 连接到 raspberry pi，并向其发送 gattservice

Connect LE bluetooth from samsung watch active wearable app to raspberry pi, and send gattservice to it

xamarin.forms

bluetooth-lowenergy

raspberry-pi3

tizen

tizen-wearable-sdk