Hi,

the scenrio is this: a bluetooth module search for a device, a pocket pc (windows mobile 6.1 professional based); the ppc is in listening for incoming connections. I'm writing this code to perform the listening of incoming connection:

public void EffettuaPairing()
{
  //dico ke sto in pairing
  inPairing = true;
  if (frmMain.spPort.IsOpen)
  {
    frmMain.spPort.Close();
  }
  //Verifico che ci sia supporto bluetooth sul dispositivo
  if (BluetoothRadio.PrimaryRadio != null)
  {
    //controllo se il bluetooth è attivato
    if (!(BluetoothRadio.PrimaryRadio.HardwareStatus == HardwareStatus.Running))
    {
      //Provo ad attivare il bluetooth
      BluetoothRadio.PrimaryRadio.Mode = RadioMode.Discoverable;
    }
    //Imposto l'indirizzo del modulo del politecnico
    addr = BluetoothAddress.Parse("XXXXXXXXXXXX");
    //Revoco il pin
    BluetoothSecurity.RevokePin(addr);
    //Istanzio il listener sul servizio di serial port
    BTlistener = new BluetoothListener(service);
    //Faccio partire il listener
    BTlistener.Start();
    //ciclo finchè non avviene il pairing
    while (!paired)
    {
      //Rilevo i dispositivi che richiedono il pin
      incoming = BluetoothSecurity.GetPinRequest();
      //Se ce ne sono...
      if (incoming != null)
      {
        //...controllo che sia il dispositivo giusto
        if (incoming.ToString() == addr.ToString())
        {
          //Se è quello giusto effettuo il pairing
          //Imposto il PIN
          BluetoothSecurity.SetPin(incoming, pin);
          //Open serial port
          frmMain.spPort.Open();
          paired = true;
          timerPairing.Enabled = true;
        }
      }
    }
  }
  inPairing = false;
  return;
}

In the main form i have the declaration of spPort as System.IO.Ports.SerialPort (Port Name "COM6") and the event handler spPort_DataRecieved, I parsing the bytes that arrives through the serial port and all works fine. My problem is that i need to verify periodically (with a timer) if the connection is alive: if the connection is down (because the ppc isn't in the range of bluetooth module, or because of any other problem), i need to do the pairing with "EffettuaPairing()". How can I do to verify if the connection is alive?

Thanks at all!

I'm confused.  You use a BluetoothListener to receive the incoming connection from the hardware module, but then use a serial port to communicate with it?  Or is the serial port connecting to a third device?

If you used a connection from the BluetoothListener then you'd know immediately when the device had gone away.  You'd get an error on that (socket) connection then (well the next time you did a read or write operation -- and you could set a background read or write to know immediately).

Thanks for reply,

I hve some question about your reply:

1. What function should I use to listen incoming connection from the specified bluetooth address? Can I use AcceptBluetoothClient() ? Where? In the internal cicle after the control on incoming address?
2. After the use of AcceptBluetoothClient() or similar, do I use BluetoothClient class methods to connect the devices?
3. I use the serial port spPort because I intercept the data received event to do the parsing of arrived bytes; If i don't use the serial port, what can I use?

I'm not an expert of 32Feet.Net...

Thanks a lot!