# Sunday, February 06, 2005

Bluetooth Library (February Edition)

Not a huge amount of change since last months release but I just wanted to post the latest update. The download includes the same Chat application samples along with the complete solution for the library itself.

Downloads

The main changes in this release are:-

  • BluetoothRadio class which handles the radio state on a single or multiple radio device. Multiple radios are only supported on XP, Windows CE supports a single radio device.
  • BluetoothSecurity class which has a couple of methods to automate the pairing (bonding) process between devices. Using SetPin and RevokePin you can specify the PIN to use with a particular remote device. Using PairRequest you can force the device to intiate a connection and bond with the remote device with the specified PIN code. Currently the BluetoothSecurity class is built for Windows CE only, in a future update this functionality will be extended to run on the desktop too.
  • General housekeeping - P/Invokes have been moved into a single NativeMethods class and a few new ones added, though not all are used by the library yet.

Online documentation for this build can be browsed here.

Bluetooth | NETCF
#    Comments [12] |
Tracked by:
"Libreria Bluetooth para .NET Compact Framework" (César A. Fong E.) [Trackback]
Tuesday, February 15, 2005 10:16:41 AM (GMT Standard Time, UTC+00:00)
The download and documentation links seem to be broken (unless they're getting blocked by the firewall here, or something daft)
benjymous
Wednesday, February 16, 2005 9:56:56 AM (GMT Standard Time, UTC+00:00)
Yes, the link is broken: it looks very useful, can you give us the right link?
Thanks
Andrea Bioli
Wednesday, February 16, 2005 10:03:32 AM (GMT Standard Time, UTC+00:00)
Yes, there is a problem with the download, I will try and fix it later today, sorry for the inconvenience

Peter
Peter
Thursday, February 17, 2005 8:06:38 AM (GMT Standard Time, UTC+00:00)
The link is still broken. Could you please fix it?
Thanks

Marco
Marco Castelvecchio
Saturday, February 19, 2005 9:38:08 PM (GMT Standard Time, UTC+00:00)
Hi Peter, I wonder if there is an application that enables the smartphone user to send a file to all the bluetooth phones/devices that it finds? If not, how hard is it to develop?
Marwan
Monday, February 21, 2005 1:52:01 AM (GMT Standard Time, UTC+00:00)
Peter i have a question.. once a bluetooth devices is bounded.. it is not discoverable isnt it?

César
cesar fong
Monday, February 21, 2005 5:26:00 AM (GMT Standard Time, UTC+00:00)
Forgot the question... :)
cesar fong
Thursday, February 24, 2005 10:56:42 PM (GMT Standard Time, UTC+00:00)
César, thats correct, however bonded devices are stored in the registry and the BondedDevices property returns a collection of these. There is no indication with these of course if the device is currently available and in range so a connection may not succeed.

Peter
Peter
Thursday, February 24, 2005 11:00:02 PM (GMT Standard Time, UTC+00:00)
Marwan,

Not too, after you've done a device discovery you can loop through the devices and attempt a connection on the ObjectPush profile. For the code required to send OBEX data see Steve Gill's code here - http://www.gatefold.co.uk/obex

Peter
Peter
Tuesday, March 01, 2005 3:44:53 PM (GMT Standard Time, UTC+00:00)
Hi Peter

Well, I guess you might have saved my day by publishing this great library. I do have some troubles making it work though, as I recieve an exception when creating an instance of OpenNETCF.Net.Sockets.BluetoothClient. The exception message is as follows:

An address incompatible with the requested protocol was used

I am not sure if my bluetooth device uses the microsoft stack (I think it might uses the WidComm stack). Does this incur a problem? I am developing on my PC?
Lasse Johansen
Tuesday, March 22, 2005 3:13:09 AM (GMT Standard Time, UTC+00:00)
Hi Peter,

Apparently my PPC will lost its pairing info with a bluetooth printer, even i had manually paired before. I am wondering, can i use ur library to pair the bluetooth printer programmatically? I using eVC++ as development language. Is is supported? Thanks in advance.
lcw
Friday, April 08, 2005 7:46:11 AM (GMT Standard Time, UTC+00:00)
I have downloaded v1.2.50205 and get the following error in the bluetoothchat application in the chatform.cs (at line 07 in the clip below)

I only get the error on my HP Ipaq hx4700, not in the emulator.


An unhandled exception of type 'System.Net.Sockets.SocketException' occurred in System.dll

Additional information: An address incompatible with the requested protocol was used




01 public class ChatForm : System.Windows.Forms.Form
02 {
03 internal System.Windows.Forms.MainMenu MainMenu1;
04 const int MAX_MESSAGE_SIZE = 128;
05 const int MAX_TRIES = 3;
06 private System.Guid ServiceName = new System.Guid("{E075D486-E23D-4887-8AF5-DAA1F6A5B172}");
07 OpenNETCF.Net.Sockets.BluetoothClient btClient = new OpenNETCF.Net.Sockets.BluetoothClient();
08 OpenNETCF.Net.Sockets.BluetoothListener btListener;
09 private bool listening = true;
10 string str;
11
12 public ChatForm()
13 {
14 //base.New();
15 InitializeComponent();
16 }

any help would be appreciated
andy aspell-clark
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