Receiving continuous data using 32feet in .Net (BLUETOOTH)

Question

I am creating a Windows Form application, where it is connecting to a device through bluetooth. I am able to send commands to the device and I am receiving the data continuously. The problem I am facing is that I am not able to show the continuous data in the text box. The text box only shows the first line of characters the application is receiving. Here is my code:

CONNECT BUTTON ACTION:

private void btnConnect_Click(object sender, EventArgs e)
    {
        if (listBox.SelectedItem != null)
        {
            lblProgress.Text = "";

            btnStart.Enabled = true;

            cBoxAvailablePorts.Enabled = cBoxAvailableBaudRates.Enabled = true;

            try
            {
                int pos = listBox.SelectedIndex;

                deviceInfo = array.ElementAt(pos);

                if (pairDevice())
                {
                    Thread thread = new Thread(() => connectThread());
                    thread.Start();
                }
                else
                {
                    MessageBox.Show("Pair failed!");
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString());
            }
        }
        else
        {
            MessageBox.Show("Please connect to a device!");
        }
    }

THREAD ACTION

private void connectThread()
    {
        //BluetoothClient client = new BluetoothClient();
        bc.BeginConnect(deviceInfo.DeviceAddress, serviceClass, this.connectCallBack, bc);
    }

CALLBACK ACTION:

private void connectCallBack(IAsyncResult result)
    {
        //BluetoothClient client = (BluetoothClient)result.AsyncState;

        try
        {
            if (bc.Connected)
            {
                MessageBox.Show("Connected!");
            }
            else
            {
                MessageBox.Show("Connection Failed!");
            }
        }
        catch (Exception)
        {
            MessageBox.Show("Not able to identify Bluetooth devices! Please try again.!");
        }
    }

START BUTTON ACTION: Here I send a command "S". In button action I call sendMessage("S"). The function that is called is shown below:

public void sendMessage(string msg)
    {
        try
        {
            if (bc.Connected)
            {
                Stream stream = bc.GetStream();

                stream.ReadTimeout = 1000;

                StreamWriter streamWriter = new StreamWriter(stream);

                streamWriter.WriteLine(msg);

                streamWriter.Flush();

                // Read operation

                StreamReader streamReader = new StreamReader(stream);

                string result = streamReader.ReadLine();

                txtResult.Text = result;
            }
            else
            {
                MessageBox.Show("Sending failed!");
            }
        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.ToString());
        }
    }

I wrote the StreamReader part in a loop, and it gave me Socket Exception. I also tried to get the data from Serial Port and used DataReceived event just in case, but still it didn't help. Any help would be appreciated. Thank you!

score 2 · Answer 1 · answered Oct 06 '17 at 04:25

OKAY! I solved the problem. Without getting in trouble with 32feet library (though it is fun to code with 32feet), I thought to make communication through serial port. I connected the device with my laptop and got to know the outgoing COMPORT in bluetooth setting of my laptop. The two-way communication can only be done through outgoing COMPORT, not the incoming COMPORT.

Suppose the outgoing COMPORT is COM12 and the baud rate that I have set is 9600. So here is my code:

public delegate void updateDelegate(string text);

private updateDelegate objDelegate;

private SerialPort serialPort;

public View() // constructor
{
        InitializeComponent();
        this.WindowState = FormWindowState.Normal;
        this.StartPosition = FormStartPosition.CenterScreen;
        this.objDelegate = new updateDelegate(getText);

        serialPort = new SerialPort("COM12", 9600);
        serialPort.Handshake = Handshake.None;
        serialPort.Parity = Parity.None;
        serialPort.StopBits = StopBits.One;
        serialPort.DtrEnable = true;
        serialPort.RtsEnable = true;
}

START BUTTON ACTION

private void btnStart_Click(object sender, EventArgs e)
    {
        sendData("S");
    }

// SEND COMMAND

    public void sendData(string msg)
    {
        try
        {
            if (!serialPort.IsOpen)
            {
                serialPort.Open();

                //serialPort.Close();
            }

            if (serialPort.IsOpen)
            {
                serialPort.Write(msg);
            }
        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.ToString());
        }
    }

// READ DATA

    public void readData()
    {
        try
        {
            serialPort.DataReceived += SerialPort_DataReceived;
        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.ToString());
        }
    }

    private void SerialPort_DataReceived(object sender, SerialDataReceivedEventArgs e)
    {
        string res = serialPort.ReadExisting();

        Thread.Sleep(500);

        txtResult.Invoke(this.objDelegate, new object[] {res});
    }

    public void getText(string text)
    {
        txtResult.Text = text;
    }

I hope this will help someone! Thank you!!!

Receiving continuous data using 32feet in .Net (BLUETOOTH)

1 Answers1