Windows (Phone) 8 NFC App Scenarios

Windows (Phone) 8NFC App Scenarios

Andreas Jakl, Mopius

Andreas JaklTwitter: @mopius

Email: andreas.jakl@mopius.com

Trainer & app developer– mopius.com

– nfcinteractor.com

Nokia: Technology Wizard

FH Hagenberg, Mobile Computing: Assistant Professor

Siemens / BenQ Mobile: Augmented Reality-Apps

Seamless Multi-User Games & CollaborationShare to OthersDiscover Your App

Near Field Communication Nfc InteractorNDEF Library

PROXIMITY & TAPPING

NFC Scenarios

Connect Devices Exchange Digital Objects Acquire Content

Tap and Do

A gesture that is a natural interaction between people in close proximity used to trigger doing something together between the devices they are holding.

System: Near Field Proximity(e.g., NFC)

Documentation: bit.ly/ProximitySpec

DocumentationWin8: bit.ly/ProximityAPI

WP8: bit.ly/ProximityAPIwp8

APP SCENARIOS

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Seamless Multi-User Games & Collaboration

General Project Setup

1 Add Proximity Capability

2 Initialize ProximityDevice_device = ProximityDevice.GetDefault();

Connect to HWDetect devices in rangePublish & subscribe to messages

How to Launch Apps

Custom URI schemelaunches app.App needs to register.

Tag directly containsapp name andcustom data.No registration necessary.

Win8 + WP8

Directly launch App

parameters app name 1platform 1 platform 2 app name 2 …

* For your low-level interest: type: Absolute URI, type name format: windows.com/LaunchApp. Contents re-formatted, e.g., with string lengths before each value

Encoded into NDEF message*

Write LaunchApp Tags

// Arguments to pass to app, valid for all platformsvar launchArgs = "user=default";

// WP8: app's product id from the app manifest, wrapped in {}var wp8App = "{5e506af4‐4586‐4c90‐bc5f‐428b12cf48bc}";

// Win8: app ID: Package.appxmanifest ‐> source ‐> <Application Id="...">var win8AppId = "Proximity.App";var win8App = Windows.ApplicationModel.Package.Current.Id.FamilyName +

"!" + win8AppId;

// Combine to LaunchApp Messagevar launchAppMessage = launchArgs +

"\tWindowsPhone\t" + wp8App + "\tWindows\t" + win8App;

1 Launch parameters, platforms + app IDs

Write LaunchApp Tags

3 Write to tags_device.PublishBinaryMessage("LaunchApp:WriteTag",

dataWriter.DetachBuffer());

var dataWriter = new Windows.Storage.Streams.DataWriter{UnicodeEncoding = Windows.Storage.Streams.UnicodeEncoding.Utf16LE};

dataWriter.WriteString(launchAppMessage);

2 Convert to byte array

nearspeak: Good+morning.

Custom dataProtocol name

Encoded Launch URI

Examples*skype:mopius?call

spotify:search:17th%20boulevard

* Definition & examples: http://en.wikipedia.org/wiki/URI_scheme

User Experience

No app installed 1 app installed 2+ apps installed

WP Protocol Association

1 Specify protocol name in WMAppManifest.xml

...</Tokens><Extensions><Protocol Name="nearspeak"

NavUriFragment="encodedLaunchUri=%s"TaskID="_default" />

</Extensions>

Protocol name

Note: different in Win8 / WP8

2 Create UriMapper class to parse parametersclass NearSpeakUriMapper : UriMapperBase{

public override Uri MapUri(Uri uri){

// Example: "Protocol?encodedLaunchUri=nearspeak:Good+morning."var tempUri = HttpUtility.UrlDecode(uri.ToString());var launchContents = Regex.Match(tempUri, @"nearspeak:(.*)$").Groups[1].Value;if (!String.IsNullOrEmpty(launchContents)){

// Launched from associated "nearspeak:" protocol// Call MainPage.xaml with parametersreturn new Uri("/MainPage.xaml?ms_nfp_launchargs=" + launchContents, UriKind.Relative);

// Include the original URI with the mapping to the main pagereturn uri;

}} Argument already handled in step 9 of LaunchApp tags (MainPage.OnNavigatedTo)

Note: different in Win8 / WP8

3 Use UriMapper in App.xaml.cs(region: )

private void InitializePhoneApplication() {RootFrame = new PhoneApplicationFrame();RootFrame.UriMapper = new NearSpeakUriMapper();

– If needed: launch protocol from app (for app2app comm)

await Windows.System.Launcher.LaunchUriAsync(new Uri("nearspeak:Good+morning."));

Register for URI Schemes

Specify URI scheme, display name + optional im

Tag Data After Launch

Activtion arguments in App.xaml.cs

protected override async void OnActivated(IActivatedEventArgs args){

if (args.Kind == ActivationKind.Protocol){

ProtocolActivatedEventArgs protocolArgs = args asProtocolActivatedEventArgs;

User Experience

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Publish Messages

Proximity devices only

– (doesn’t write tags)

Windows Protocol + URI record

– Encapsulated in NDEF

_publishingMessageId = _device.PublishUriMessage(new Uri("nfcinteractor:compose"));

1 Start publishing

Contains scheme,

platform & App ID

Write Tags

1 Prepare & convert datavar dataWriter =

new Windows.Storage.Streams.DataWriter { UnicodeEncoding = Windows.Storage.Streams.

UnicodeEncoding.Utf16LE};

dataWriter.WriteString("nfcinteractor:compose");var dataBuffer = dataWriter.DetachBuffer();

2 Write tag (no device publication)_device.PublishBinaryMessage("WindowsUri:WriteTag", dataBuffer);

Mandatory encoding

bit.ly/PublishTypes

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Share to Others

Tap for

Quick Data Exchange

ProximityDeviceExchange Windows /

NDEF messages,SNEP protocol

Long Term Connection

PeerFinderAutomatically builds

Bt / WiFi Directsocket connection

Establishing

Long Term Connection

Trigger

Interact with TapNFC

Browse

Start SearchBt, WiFi, etc.

Tap to Trigger

App not installed

App installed

Connection State

PeerFound

1Proximity gesture completeDevices can be pulled away

Connecting /Listening

2Which device initiated tap gesture?→ Connecting, other device Listening

Completed

3Access socket of persistent transport

(e.g., TCP/IP, Bt)

Find Peers

PeerFinder.TriggeredConnectionStateChanged +=TriggeredConnectionStateChanged;

PeerFinder.Start();

1 Start waiting for triggered connections

2 Peer found & connection established? Send message over socket

* For URI records + simple Smart Poster (w/o title), use the WindowsUri type.

private async void TriggeredConnectionStateChanged(object sender, TriggeredConnectionStateChangedEventArgs eventArgs) {

if (eventArgs.State == TriggeredConnectState.Completed) {// Socket connection established!var dataWriter = new DataWriter(eventArgs.Socket.OutputStream);dataWriter.WriteString("Hello Peer!");var numBytesWritten = await dataWriter.StoreAsync();

}}Completed

TOOLS & RESOURCES

UX Recommendations*

User initiated peer search only Ask for consent Show connection

Failed connection?

Inform & revert to single-user mode

Let user get out of proximity

experience

Proximity: only if connection details

not relevant

NFC ToolsProximity Tapper for WP emulator

– http://proximitytapper.codeplex.com/

Open NFC Simulator

– http://open-nfc.org/wp/editions/android/

NFC plugin for Eclipse: NDEF Editor

– https://code.google.com/p/nfc-eclipse-plugin/

nfcinteractor.com

NFC Resources NFC News: nfcworld.com

NFC developer comparison

(WP, Android, BlackBerry):

bit.ly/NfcDevCompare

Specifications: nfc-forum.org

NDEF HANDLINGStandardized NFC Tag Contents

NDEF Message

NFC Data

NDEF Record(e.g., URL) …

NDEF = NFC Data Exchange Format

SNEP = Simple NDEF Exchange Protocol

NDEF Message

NDEF Record(e.g., URL) …

Reading NDEF

_subscribedMessageId = _device.SubscribeForMessage("NDEF", MessageReceivedHandler);

1 Subscribe to all NDEF messages

2 Parse raw byte array in handler

http://www.nfc-forum.org/specs/

_subscribedMessageId = _device.SubscribeForMessage("NDEF", MessageReceivedHandler);

Subscribe to all NDEF messages

Parse raw byte array in handler

http://www.nfc-forum.org/specs/

// Convert the language code to a byte arrayvar languageEncoding = Encoding.UTF8;var encodedLanguage = languageEncoding.GetBytes(languageCode);// Encode and convert the text to a byte arrayvar encoding = (textEncoding == TextEncodingType.Utf8) ? Encoding.UTF8 : Encoding.BigEndianUnicode;var encodedText = encoding.GetBytes(text);// Calculate the length of the payload & create the arrayvar payloadLength = 1 + encodedLanguage.Length + encodedText.Length;Payload = new byte[payloadLength];

// Assemble the status bytePayload[0] = 0; // Make sure also the RFU bit is set to 0// Text encodingif (textEncoding == TextEncodingType.Utf8)

Payload[0] &= 0x7F; // ~0x80else

Payload[0] |= 0x80;

// Language code lengthPayload[0] |= (byte)(0x3f & (byte)encodedLanguage.Length);

// Language codeArray.Copy(encodedLanguage, 0, Payload, 1, encodedLanguage.Length);

// TextArray.Copy(encodedText, 0, Payload, 1 + encodedLanguage.Length, encodedText.Length);Si

Reading NDEF

NDEF.codeplex.com

Reusable NDEF classes

Create NDEFmessages & records

(standard compliant)

Parse informationfrom raw byte arrays

Fully documentedOpen Source LGPL license

(based on Qt Mobility)

NDEF Subscriptions

_subscribedMessageId = _device.SubscribeForMessage("NDEF",MessageReceivedHandler);

1 Subscribe to all NDEF formatted tags

private void MessageReceivedHandler(ProximityDevice sender, ProximityMessage message){

var msgArray = message.Data.ToArray();NdefMessage ndefMessage = NdefMessage.FromByteArray(msgArray);[...]

2 Parse NDEF message

NDEF Subscriptions

foreach (NdefRecord record in ndefMessage) {

Debug.WriteLine("Record type: " + Encoding.UTF8.GetString(record.Type, 0, record.Type.Length));

// Check the type of each record ‐ handling a Smart Poster in this exampleif (record.CheckSpecializedType(false) == typeof(NdefSpRecord)) {

// Convert and extract Smart Poster infovar spRecord = new NdefSpRecord(record);Debug.WriteLine("URI: " + spRecord.Uri);Debug.WriteLine("Titles: " + spRecord.TitleCount());Debug.WriteLine("1. Title: " + spRecord.Titles[0].Text);Debug.WriteLine("Action set: " + spRecord.ActionInUse());

3 Analyze all contained NDEF records with specialized classes

Write NDEF

1 Prepare & convert data// Initialize Smart Poster record with URI, Action + 1 Titlevar spRecord = new NdefSpRecord

{ Uri = "http://www.nfcinteractor.com" };spRecord.AddTitle(new NdefTextRecord

{ Text = "Nfc Interactor", LanguageCode = "en" });

// Add record to NDEF messagevar msg = new NdefMessage { spRecord };

2a Write tag// Publish NDEF message to a tag_device.PublishBinaryMessage("NDEF:WriteTag", msg.ToByteArray().AsBuffer());

2b Publish to devices// Alternative: send NDEF message to another NFC device_device.PublishBinaryMessage("NDEF", msg.ToByteArray().AsBuffer());

Supported Record Types

Smart Poster URI

Text LaunchApp

Android Application Record (AAR)Windows Phone SettingsNokia Accessories Record

NearSpeak Voice Messages

Geo tagsSocial tagsSMS tagsTelephone callMailto tags

ndef.mopius.com

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Near Field Communication Nfc InteractorNDEF Library

Thank You.

Andreas Jakl@mopius

mopius.comnfcinteractor.com

Windows (Phone) 8 NFC App Scenarios

Technology

System Frameworks #WWDC17€¦ · Near Field Communication (NFC) Close proximity wireless communication RF technologies: NFC-A, NFC-B, NFC-F, NFC-V NFC Data Exchange Format (NDEF)

NFC Device Interoperability Scenariosnfc-forum.org/wp-content/uploads/2013/11/Interoperability_Test...NFC Device Interoperability Scenarios, Release 0.4 This documentation proposes

NFC Goes Vertical: Introducing NFC Forum Special Interest ...nfc-forum.org/wp-content/uploads/2013/12/NFC-Goes-Vertical-Webcast-Presentation.pdfNFC Goes Vertical: Introducing NFC Forum

NFC-A, NFC-B and NFC-F Protocol Analyzer

NFC M24LRxx CR95HF - etc · NFC Portfolio presentation NFC Tag with serial interface • NFC Reader-Writer NFC Transceiver NFC Controller & Secure Element NFC Summary . NFC Transceiver

Василий Бернштейн. Тенденции мобильных платежей – NFC & In-App Payments. РИФ-Воронеж 2016

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Ecosystem Scenarios for Cloud-based NFC Payments Pardis Pourghomi and George Ghinea School of Information Systems, Computing and Mathematics

NFC Near Field Communicationcontent/translations/en.IoTWorld2018-NFC.pdf · NFC –Near Field Communication NFC / RFID READER ICs Demo Info NFC Dynamic TAGS NFC/RFID TAG NFC/RFID

NFC Application: Access - MobileKnowledge€¦ · NFC Application: Access BU Security and Connectivity ... NFC Standards NFC cards and readers NFC devices ISO/IEC 14443 ISO/IEC 15693

NFC in Japan NFC Forum - Meetupfiles.meetup.com/2610372/2012 05 23 NFC Solutions Summit Meetup... · NFC in Japan and NFC Forum ... •CRM effect Fact Advantages Trend ... papers,

Scenarios, functionnal and technical specifications › docs › projects › cnect › 2 › ... · discovery, context discovery, app-to-app communication, interactive multi-screen

Technical data sheet PRCA-S2-T - Belimo · - Belimo Assistant App (Google Play & Apple AppStore) Align NFC-capable smartphone on the actuator so that both NFC antennas are superposed

Manuscript version: Author’s Accepted Manuscript …wrap.warwick.ac.uk/112097/1/WRAP-NFC-payment-spy-privacy...app using the phone’s NFC functionality which the user needs to install

NFC Inventory Android App Jeremy Sagaille. Project Introduction Implementing RFID inventory system

アプリケーション - KDDImedia.kddi.com/app/publish/torisetsu/pdf/lgl24_torisetsu... · 2014. 7. 15. · nfcメニュー nfcサービスに対応するアプリの一覧表示やnfc

Ecosystem Scenarios for Cloud- based NFC Payments Pardis Pourghomi and George Ghinea School of Information Systems, Computing and Mathematics Brunel University

One-touch connection with a smartphone (NFC)/ Pairing and ...tart the app “NFC Easy Connect” on the smartphone.S Make sure that the application screen is displayed. 4 ouch this

ST Solutions for Asset Tracking• ST Asset Tracking App • ST NFC Sensor App •DSH-ASSETRACKING cloud application providing intuitive interface tailored for the collection, visualization