Windows Phone 8 NFC Quickstart

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.

Near Field
Communication NearSpeak


Near Field Communication


Scenarios

Connect Devices Exchange Digital Objects Acquire Content


Windows Phone 8 +
Proximity APIs

Windows 8
Documentation
Win8: bit.ly/ProximityAPI
WP8: bit.ly/ProximityAPIwp8


NearSpeak
nearspeak.at


NearSpeak

Record a Write to an Tap the tag to
voice message NFC tag launch the app &
hear the text!


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();


UI Design


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));


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

NDEF = NFC Data Exchange Format, Container image adapted from s_volenszki (Flickr), released under Creative Commons BY-NC 2.0

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)


Supported Record Types
Geo tags
Smart Poster Social tags
URI SMS tags
Text Telephone call
LaunchApp
Android Application Record (AAR)
Nokia Accessories Record

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.

NDEF Library
5 Use NuGet package manager to install NDEF Library for Proximity APIs


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);


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"));
}


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"]);
}
}


Nfc Interactor for
Windows Phone 8


nfcinteractor.com


Near Field
Communication NearSpeak


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


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