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How to create a Bluetooth connection that can be used across your Windows Phone app

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This article explains how to create a Bluetooth connection that can be used in any page of a Windows Phone application.

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Article Metadata
Code ExampleTested with
Devices(s): Lumia 820, Lumia 620
Compatibility
Platform(s): Windows Phone 8.0 and later
Windows Phone 8
Article
Created: ceriboo (06 May 2013)
Last edited: hamishwillee (04 Jul 2013)

Contents

Overview

The Dev Center documentation shows how to create and use a Bluetooth connection using a new StreamSocket. However in a real app you won't create a connection every time, but instead create a single instance to be used across your whole app.

This article shows how you can create a connection that works across all pages. Note that Bluetooth stream sockets only work with Windows Phone 8 and later.

Solution

The solution is to create a static StreamSocket as part of your App class. This can then be referenced throughout your app using its full scope.

Declare the static StreamSocket in App.xaml.cs as shown:

public static StreamSocket Socket;

To use this socket in a page you can reference it using its full scope App.Socket. The line below shows how you'd create the socket.

App.Socket = new StreamSocket();


Bluetooth for Windows Phone 8 shows in more detail how to find a Bluetooth device using PeerFinder, connect to it using Socket::ConnectAsync(), and send and receive information using App.Socket.OutputStream.WriteAsync and App.odbSocket.InputStream.ReadAsync as appropriate.

Code Sample

This code sample shows how to find peers and connect to them in several pages. File:HowToKeepBT.zip

Summary

This article showed how to create a static Bluetooth connection that can be used through your app.

This approach has been verified in the test app, and also my commercial apps:

Reference

Bluetooth for Windows Phone 8 (Dev Center)

Acknowledgements

This article was only possible with super advice from my Facebook friend Olivier Bacheliez.

This page was last modified on 4 July 2013, at 04:45.
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