Hallo everybody!

I need some help with a problem I have:

I want to wait via Smartphone for a bluetooth- connection. After successful connection a stream should be open and a data transmition can start. 

I tried the Bluetoothlistener but wasn't successful.

Can anybody give me a link, a code that helps me?

I am hoping for answers :)

Kind regads

Alex

 

Don't know whether you've read the User Guide (in the release and at http://www.alanjmcf.me.uk/comms/bluetooth/32feet.NET -- User Guide.html).  There's a code sample there.  You can also just run the SdpBrowserXxxx sample and you can start a bluetooth listener using it (on any standard Service Class Id).

What does the client program do?  Connect to Service Class "Serial Port"?  Or something different?

The Client program should wait for an connection request from a blood pressure metre. After the connection the measurements should be transmitted.

I have tried the follow code

public NetworkStream WaitForConnection()
        {       
            BluetoothRadio.PrimaryRadio.Mode = RadioMode.Discoverable;
            Guid g = BTServices.Instance.GetServiceValue("SerialPort");
            BluetoothListener listener = new BluetoothListener(g);
            listener.Start();
            BluetoothClient c=listener.AcceptBluetoothClient();
            return c.GetStream();
        }

 If  I am right, this is the moment where the listener is waiting for a connection!?!? My device worked and should have searched for my "Bluetoothname" In the underline line, the program stops and nothing happens (So it still doesn't work). Is the listener waiting for a connection there?

What should normaly happens I there is a pairing request?

I know this are stupid questions :D but I am a beginner!

I would call that code "server", its hosting a Bluetooth RFCOMM service.  That code looks fine (assuming the correct Guid is being used), so it would just seem that the other device is not connecting.  How does the " blood pressure meter" know what device to connect to?  Does your smartphone have to be given a special Bluetooth Device Name perhaps?  Is there documentation somewhere online for the meter?

I've tried an test application to connect to my Smartphone. This worked. So the problem is at the blood pressure meter!

 The device has two different modes:

Active and passive

In the passive mode it does an measurement and establish a connection after doing.

So you can connect to the device and request the result.

This worked pretty good. I have done this in a short time.

 But I need this in an active mode.

In this mode the device searches after each measurement for an established bluetooth connection.

You have to set a filter on the device.

The filter seaches for special name ,special DIAC and special service.

The thing I am knowing for 100% sure is the name of the device, the DIAC!

But I am not sure for the name of the service: If I establish a connection with the Guid "SerialPort" do you think that the blood meter finds this as "SerialPort"? How can I find out which Service a device establish? Does it work with the Class DeviceInfo?

 

Ok! I have solved the problem!

 There were many reasons why it didn't work

• old version of library
• wrong COD
• wrong servicename

:D

 At least one question... Is it possible to use Bluetooth as well as server as well as client?

 

Glad to hear you solved it.

In this case where you are using BluetoothListener you are acting as a server, the meter device is "active" and is thus a client.