This document provides instructions for building a Windows Phone 8 application that uses Near Field Communication (NFC) functionality. It discusses initializing the NFC device and speech recognition capabilities. It also explains how to create an NDEF message containing a text record when a voice command is recognized, and how to write that message to an NFC tag. When the tag is tapped, the application launches and speaks the text aloud. The document recommends using an open-source NDEF library and provides code samples to implement these NFC features.

1. Windows Phone 8 NFC
Quickstart – NearSpeak
Andreas Jakl
[@mopius]
nfcinteractor.com
Technology Wizard
Nokia
1 Windows Phone 8 NFC Quickstart - NearSpeak v1.1.0 November 20, 2012 © 2012 Andreas Jakl
NFC Forum and the NFC Forum logo are trademarks of the Near Field Communication Forum.

2. Near Field
Communication NearSpeak
2 Windows Phone 8 NFC Quickstart - NearSpeak v1.1.0 November 20, 2012 © 2012 Andreas Jakl

3. Near Field Communication
3 Windows Phone 8 NFC Quickstart - NearSpeak v1.1.0 November 20, 2012 © 2012 Andreas Jakl

4. Scenarios
Connect Devices Exchange Digital Objects Acquire Content
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5. Windows Phone 8 +
Proximity APIs
Windows 8
Documentation
Win8: bit.ly/ProximityAPI
WP8: bit.ly/ProximityAPIwp8
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6. NearSpeak
nearspeak.at
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7. NearSpeak
Record a Write to an Tap the tag to
voice message NFC tag launch the app &
hear the text!
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8. General Project Setup
1 Add Capabilities: Proximity, Microphone, Speech Recognition, Networking
Requirement: NFC
Connect to HW
2 Initialize ProximityDevice Detect devices in range
_device = ProximityDevice.GetDefault(); Publish & subscribe to messages
3 Initialize Speech Recognizer & Synthesizer
_recognizer = new SpeechRecognizer();
_synthesizer = new SpeechSynthesizer();
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9. UI Design
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10. Listen
4 Text recognition (Speech-to-Text)
var recoResult = await _recognizer.RecognizeAsync();
MessageBox.Show(string.Format("You said "{0}"n
Please touch a tag to write the message.",
recoResult.Text));
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11. Data on an NFC Tag
LaunchApp
Arguments
[speech text]
WindowsPhone app ID
{0450eab3-92…}
Data Encapsulated in Encoded through Stored on
NDEF Record(s) NDEF Message NFC Forum NFC Forum Tag
Tag Type Platform
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NDEF = NFC Data Exchange Format, Container image adapted from s_volenszki (Flickr), released under Creative Commons BY-NC 2.0

12. NDEF.codeplex.com
Create NDEF Reusable
Parse information
messages & records NDEF from raw byte arrays
(standard compliant) classes
Fully documented
Open Source LGPL license
(based on Qt Mobility)
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13. Supported Record Types
Geo tags
Smart Poster Social tags
URI SMS tags
Text Telephone call
LaunchApp
Android Application Record (AAR)
Nokia Accessories Record
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Why use the library for “Talking Tags”? Creating LaunchApp records is easier, and you can also send them to other phones and not only write to a tag.

14. NDEF Library
5 Use NuGet package manager to install NDEF Library for Proximity APIs
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15. Write NFC Tags
6 Create LaunchApp Message (in button call-back method)
var record = new NdefLaunchAppRecord {Arguments = recoResult.Text};
record.AddPlatformAppId("WindowsPhone", "{...}");
var msg = new NdefMessage {record};
7 Write to the next tag
_device.PublishBinaryMessage("NDEF:WriteTag",
msg.ToByteArray().AsBuffer(), MessageWrittenHandler);
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16. Write NFC Tags
8 NFC message written to a tag? Inform user
private void MessageWrittenHandler(
ProximityDevice sender, long messageId)
{
Dispatcher.BeginInvoke(() => MessageBox.Show(
"Message written"));
}
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17. Speak When Launched
9 App launched from a tag? Speak the stored text!
protected override async void OnNavigatedTo(
NavigationEventArgs e)
{
base.OnNavigatedTo(e);
if (NavigationContext.QueryString.ContainsKey(
"ms_nfp_launchargs"))
{
await _synthesizer.SpeakTextAsync(
NavigationContext.QueryString
["ms_nfp_launchargs"]);
}
}
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18. Nfc Interactor for
Windows Phone 8
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19. nfcinteractor.com
19 Windows Phone 8 NFC Quickstart - NearSpeak v1.1.0 November 20, 2012 © 2012 Andreas Jakl

20. Near Field
Communication NearSpeak
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21. Thank You.
NFC Introduction
bit.ly/NfcIntro
Andreas Jakl
Related Presentations
[@mopius] Windows (Phone) 8 NFC App Scenarios
bit.ly/NFCAppScenarios
nfcinteractor.com
NFC Development on the Windows 8 Platform
Technology Wizard
bit.ly/Win8NFC
Nokia
NFC Development with Qt on Symbian and MeeGo
bit.ly/NfcDevelopment
21 Windows Phone 8 NFC Quickstart - NearSpeak v1.1.0 November 20, 2012 © 2012 Andreas Jakl