http://www.32feet.NET - Personal Area Networking for .NET
Bluetooth Development
with .NET
Peter Foot

http://www.32feet.NET - Personal Area Networking for .NET
32feet.NET
• Collection of libraries for .NET
• For Desktop, Embedded and Mobile
devices
• Currently Bluetooth and IrDA transports
and Object Exchange protocol support
• Designed to complement existing network
support in .NET
• Online forums and documentation

http://www.32feet.NET - Personal Area Networking for .NET
Supported Platforms
• Windows XP SP1 (And later)
– Running Microsoft Bluetooth Stack
• Windows CE 4.1 (And later)
– Including Windows Mobile 2003 and up
– Running Microsoft Bluetooth Stack
• Broadcom (Widcomm) stack not currently
supported - http://www.high-point.com

http://www.32feet.NET - Personal Area Networking for .NET
Bluetooth Tasks
• Manage device radio state
• Find available devices
• Make connections
• Host a service
• Send objects

http://www.32feet.NET - Personal Area Networking for .NET
BluetoothRadio
• Windows CE supports single radio
BluetoothRadio.PrimaryRadio
• Windows XP supports multiple radios
BluetoothRadio.AllRadios
• .Mode – Off, On & Discoverable
• .IsSupported – Detect whether Microsoft
Bluetooth stack is installed

http://www.32feet.NET - Personal Area Networking for .NET
Discover
• BluetoothClient class
• .DiscoverDevices()
– Default will return all devices
– Optionally return only previously bonded
devices, or only unknown devices
– Returns collection of BluetoothDeviceInfo
objects

http://www.32feet.NET - Personal Area Networking for .NET
Choose a Device
• SelectBluetoothDeviceDialog

http://www.32feet.NET - Personal Area Networking for .NET
Demo
• Discovering Devices

http://www.32feet.NET - Personal Area Networking for .NET
Connecting
• Use the BluetoothClient class
• Specify the unique service id
• BluetoothService class contains
standard service ids
• Read and write data via a NetworkStream
object
• Close stream when finished

http://www.32feet.NET - Personal Area Networking for .NET
Demo
• Connect to GPS

http://www.32feet.NET - Personal Area Networking for .NET
Host a Service
• Use the BluetoothListener class
• Create a unique service id (Guid)
• Start() to publish your service
• AcceptSocket() or
AcceptBluetoothClient()
– Block until incoming connection is made
• Send and receive data
• Stop() to unregister the service

http://www.32feet.NET - Personal Area Networking for .NET
Send Objects
• ObexWebRequest
• Works just like an HttpWebRequest
• Send any file or object
• Some devices may only accept common
object types – vCard, vCalendar etc
• Common Mime types are in
InTheHand.Net.Mime namespace

http://www.32feet.NET - Personal Area Networking for .NET
Demo
• Send a vCard

http://www.32feet.NET - Personal Area Networking for .NET
Receive Objects
• ObexListener
• Works like HttpListener (.NET 2.0)
• Receive incoming objects
• Sample included in the download

http://www.32feet.NET - Personal Area Networking for .NET
Call to Action
• Easy to add Personal Area Networking to
your .Net applications
• Download the latest version:-
– http://www.32feet.net
• Start developing exciting applications
• Let me know how you get on:-
– peter.foot@gmail.com

http://www.32feet.NET - Personal Area Networking for .NET
Demo
• Receiving beamed images

http://www.32feet.NET - Personal Area Networking for .NET
Any Questions?