Symbol.WPAN.Bluetooth传输数据的示例

Question

我正在尝试使用符号设备的EMDK附带的Symbol.WPAN.Bluetooth.

有没有人碰巧有一个传输数据的工作示例？

Symbol的示例只是将设备配对.(他们显然认为在个人区域网络示例中并不真正需要传输数据.)

无论如何,我知道这是一个很长的镜头,但如果有人让这个工作,我很乐意看到一些代码.

这就是我尝试过的.我有一个设备按下按钮1和另一个设备按下按钮2.读取值始终为零长度字节数组.

using System.Text;
using System.Windows.Forms;
using Symbol.WPAN;
using Symbol.WPAN.Bluetooth;

namespace SmartDeviceProject1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            Bluetooth bluetooth = new Bluetooth();
            if (bluetooth.IsEnabled != true)
            {
                bluetooth.Enable();
                bluetooth.RadioMode = BTH_RADIO_MODE.BTH_DISCOVERABLE_AND_CONNECTABLE;
            }

            RemoteDevice connectedDevice = null;
            foreach (RemoteDevice remoteDevice in MakeEnumerable(bluetooth.RemoteDevices))
            {
                if ((remoteDevice.Name == "WM_Dan")  && (remoteDevice.IsPaired == false))
                {
                    remoteDevice.Pair();
                    connectedDevice = remoteDevice;
                }
            }

            string test;
            test = "Testing this out";
            ASCIIEncoding encoding = new ASCIIEncoding();
            byte[] encTest = encoding.GetBytes(test);


            if (connectedDevice != null)
            {
                connectedDevice.WriteTimeout = 20000;
                connectedDevice.Write(encTest);
            }


        }

        public static IEnumerable<RemoteDevice> MakeEnumerable(RemoteDevices devices)
        {
            for (var i = 0; i < devices.Length; i++)
            {
                yield return devices[i];
            }
        }

        private void button2_Click(object sender, EventArgs e)
        {
            Bluetooth bluetooth = new Bluetooth();

            if (bluetooth.IsEnabled != true)
            {
                bluetooth.Enable();
                bluetooth.RadioMode = BTH_RADIO_MODE.BTH_DISCOVERABLE_AND_CONNECTABLE;
            }

            RemoteDevice connectedDevice = null;
            foreach (RemoteDevice remoteDevice in MakeEnumerable(bluetooth.RemoteDevices))
            {
                if ((remoteDevice.Name == "WM_Dan2") && (remoteDevice.IsPaired == false))
                {
                    remoteDevice.Pair();
                    connectedDevice = remoteDevice;
                }
            }

            string test;
            test = "Testing this out";
            ASCIIEncoding encoding = new ASCIIEncoding();
            byte[] encTest = encoding.GetBytes(test);
            byte[] encTest2;
            string test2;

            if (connectedDevice != null)
            {
                connectedDevice.ReadTimeout = 20000;
                encTest2 = connectedDevice.Read(encTest.Length);
                test2 = encoding.GetString(encTest2, 0, encTest2.Length);
                MessageBox.Show(test2);
            }

        }

    }
}

Answer 1

我放弃使用内置的 com 端口连接并在连接上打开一个 SerialPort 对象。

SerialPort sp = new SerialPort();
sp.PortName = "COM" + connectedDevice.LocalComPort.ToString();
sp.BaudRate = 9600;
sp.DataBits = 8;
sp.Parity = Parity.None;
sp.StopBits = StopBits.One;

sp.Open();
sp.Open();
sp.DataReceived += new SerialDataReceivedEventHandler(sp_DataReceived);
sp.ErrorReceived += new SerialErrorReceivedEventHandler(sp_ErrorReceived);
sp.WriteLine(textBoxSend.Text);

我还发现，尽管他们的文档说 LocalComPort 是自动分配的，但这并不总是事实。最好先用他们的BTExplorer来设置一下。

同样，OpenComPort 可以在不应该工作的情况下工作——使用 Reflector 显然是错误的。检查::CreateFile("COM" + port...) 0 的返回而不是 -1 ( INVALID_HANDLE_VALUE)