/// <summary> Starts connection to the WeDo Hubs. </summary>
/// <returns> If the method completed with success the returning value is
/// <see cref="wclErrors.WCL_E_SUCCESS" />. If the method failed the returning value is
/// one of the Bluetooth Framework error code. </returns>
/// <remarks> The method starts searching for WeDo Hubs and to connect to each found. Once the Hub found
/// the <c>OnHubFound</c> event fires. An application may accept connection to this Hub by setting
/// the <c>Connect</c> parameter to <c>true</c>. </remarks>
public Int32 Start()
{
if (FRadio != null)
{
return(wclConnectionErrors.WCL_E_CONNECTION_ACTIVE);
}
Int32 Res = FManager.Open();
if (Res == wclErrors.WCL_E_SUCCESS)
{
Res = FManager.GetLeRadio(out FRadio);
if (Res == wclErrors.WCL_E_SUCCESS)
{
// Try to start watching for HUBs.
Res = FWatcher.Start(FRadio);
// If something went wrong we must clear the working radio objecy.
if (Res != wclErrors.WCL_E_SUCCESS)
{
FRadio = null;
}
}
// If something went wrong we must close Bluetooth Manager
if (Res != wclErrors.WCL_E_SUCCESS)
{
FManager.Close();
}
}
return(Res);
}
private void BtConnect_Click(Object Sender, EventArgs e)
{
// The very first thing we have to do is to open Bluetooth Manager.
// That initializes the underlying drivers and allows us to work with Bluetooth.
// Always check result!
Int32 Res = FManager.Open();
if (Res != wclErrors.WCL_E_SUCCESS)
{
// It should never happen but if it does notify user.
MessageBox.Show("Unable to open Bluetooth Manager: 0x" + Res.ToString("X8"));
}
else
{
// Assume that no one Bluetooth Radio available.
wclBluetoothRadio Radio = null;
Res = FManager.GetLeRadio(out Radio);
if (Res != wclErrors.WCL_E_SUCCESS)
{
// If not, let user know that he has no Bluetooth.
MessageBox.Show("No available Bluetooth Radio found");
}
else
{
// If found, try to start discovering.
Res = FWatcher.Start(Radio);
if (Res != wclErrors.WCL_E_SUCCESS)
{
// It is something wrong with discovering starting. Notify user about the error.
MessageBox.Show("Unable to start discovering: 0x" + Res.ToString("X8"));
}
else
{
btConnect.Enabled = false;
btDisconnect.Enabled = true;
laStatus.Text = "Searching...";
}
}
// Again, check the found Radio.
if (Res != wclErrors.WCL_E_SUCCESS)
{
// And if it is null (not found or discovering was not started
// close the Bluetooth Manager to release all the allocated resources.
FManager.Close();
// Also clean up found Radio variable so we can check it later.
Radio = null;
}
}
}
