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1 <!DOCTYPE html>
2 <html>
3 <head>
4   <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
5   <meta name="Author" content="KaiRo - Robert Kaiser">
6   <title>Firefox OS Tricorder</title>
7   <link rel="stylesheet" type="text/css" href="slides.css">
8   <script type="text/javascript" src="slides.js"></script>
9   <link rel="contents" href="#index" title="Overview">
10   <link rel="index" id="link-toc" href="#toc" title="Contents">
11   <link rel="start" id="link-start" href="#index" title="Start">
12 </head>
13 <body onload="docLoaded();">
14 <header id="header"><div id="header-text">Tricorder</div>
15   <div id="subheader-text"></div>
16   <a id="headerlogo" href="#index" title="Startseite">Mozilla</a>
17 </header>
18 <nav id="slidenav">
19   <a href="#toc" id="nav-toc" accesskey="t">toc</a> ||
20   <a href="#index" id="nav-start" accesskey="s">start</a> ||
21   <a href="#" id="nav-prev" accesskey="p" hidden>&lt; back</a>
22   <span id="nav-prev-nolink" class="nolink">&lt; back</span> |
23   <a href="#" id="nav-next" id="goNext" accesskey="n" hidden>fwd &gt;</a>
24   <span id="nav-next-nolink" class="nolink">fwd &gt;</span>
25 </nav>
26
27 <article id="toc" title="Table of Contents">
28 <h1>Table of Contents</h1>
29 <h2>Firefox OS Tricorder</h2>
30
31 <div class="captionedbox">
32 <p class="captionedbox-caption">The following slides are available in this presentation:</p>
33 <div class="captionedbox-content">
34 <ul id="toc-list">
35 </ul>
36 </article>
37
38 <article id="index" title="Start Page">
39 <h1>Firefox OS Tricorder</h1>
40 <h2>Reading Device Sensor Data in JavaScript</h2>
41
42 <div class="simplebox">
43 <mark><a href="http://home.kairo.at/">Robert Kaiser</a></mark>,
44 "KaiRo" &lt;kairo@kairo.at&gt;
45 <br><small>Program Manager, Mozilla QA</small>
46 </div>
47
48 <div class="captionedbox">
49 <p class="captionedbox-caption">Slides:
50   <a href="http://slides.kairo.at/fosdem2015/">http://slides.kairo.at/fosdem2015/</a></p>
51 <div class="captionedbox-content small">
52 <ul class="small">
53   <li>Created for
54     <a href="http://fosdem.org/2015/schedule/track/mozilla/">Mozilla
55     Developer Room</a> at <a href="http://www.fosdem.org/">FOSDEM 2015</a> in
56     Brussels.</li>
57   <li>Written in HTML 5 with CSS 3 and JavaScript.</li>
58   <li>Navigation via links on all slides, via access keys
59    (e.g. "n"/Alt+Shift+N for "next") or back/forward arrow keys</li>
60   <li><a href="#toc">Contents</a></li>
61   <li><a rel="license" href="http://creativecommons.org/licenses/by-sa/3.0/at/"><img
62         alt="Licensed under CC-BY-SA," style="border-width:0;vertical-align:bottom;"
63         src="cc-by-sa-80x15.png"></a> 01/2015 Robert Kaiser -
64     "Mozilla", "Firefox" and their logos are
65     <a href="http://www.mozilla.org/foundation/trademarks/list.html">trademarks
66     of the Mozilla Foundation</a>; <a href="http://www.startrek.com/">Star Trek</a>
67     and related items are trademarks of
68     <a href="http://www.paramount.com/">Paramount Pictures</a>.</li>
69 </ul>
70 </div>
71 </div>
72 </article>
73
74 <article id="tricorder" title="Tricorder">
75 <h1>What is a Tricorder?</h1>
76
77 <div class="simplebox">
78 <img src="starfleet_tricorder_2370.jpg" class="slidepic"
79  alt="Starfleet Tricorder, 2370">
80 <p>Sensor device as seen on "Star Trek"</p>
81 <p>Displays whatever data is needed at plot speeds and resolutions.</p>
82 <p class="ensurepicinbox"></p>
83 </div>
84 </article>
85
86 <article id="fxos-tricorder" title="Firefox OS Tricorder">
87 <h1>Firefox OS Tricorder App</h1>
88
89 <div class="simplebox">
90 <p>Displays data from device sensors as exposed by WebAPIs</p>
91 <p><a href="https://marketplace.firefox.com/app/tricorder/">marketplace.firefox.com/app/tricorder/</a></p>
92 <p>Code: <a href="https://github.com/KaiRo-at/tricorder">github.com/KaiRo-at/tricorder</a></p>
93 </div>
94 </article>
95
96 <article id="ui" title="UI">
97 <h1>Firefox OS Tricorder UI</h1>
98
99 <div class="simplebox cent">
100 <img src="tricorder-ui.svg"
101      alt="Tricorder UI description">
102 </div>
103 </article>
104
105 <article id="module" title="Module">
106 <h1>Module</h1>
107
108 <div class="simplebox">
109 <ul>
110   <li>HTML (switch, display)</li>
111   <li>JS Object
112     <ul>
113       <li>2 Methods: activate(), deactivate()</li>
114     </ul>
115   </li>
116 </ul>
117 </div>
118 </article>
119
120 <article id="position" title="Position Module">
121 <h1>Position Module</h1>
122
123 <div class="simplebox">
124 <p>GPS, WiFi/Cell Location</p>
125 <p>API: <a href="https://developer.mozilla.org/en-US/docs/Web/API/Geolocation">Geolocation</a></p>
126 <p>Permission: geolocation</p>
127 </div>
128 </article>
129
130 <article id="position-code" title="Position: Code">
131 <h1>Position: Code</h1>
132
133 <div class="simplebox">
134 <pre>
135   this.watchID = <a href="https://developer.mozilla.org/en-US/docs/Web/API/Geolocation.watchPosition">navigator.geolocation.watchPosition</a>(
136     function(position) {
137       position.coords.latitude / .longitude / .accuracy / ...
138     },
139     function(error) { ... },
140     {enableHighAccuracy: true, maximumAge: 10000, timeout: 60000}
141   );
142
143   navigator.geolocation.clearWatch(this.watchID);
144 </pre>
145 </div>
146 </article>
147
148 <article id="gravity" title="Gravity Module">
149 <h1>Gravity Module</h1>
150
151 <div class="simplebox">
152 <p>Accelerometer, Magnetometer</p>
153 <p>APIs: <a href="https://developer.mozilla.org/en-US/docs/Web/API/DeviceOrientationEvent">deviceorientation</a>,
154 <a href="https://developer.mozilla.org/en-US/docs/Web/API/DeviceMotionEvent">devicemotion</a> events</p>
155 <p>Permissions: ---</p>
156 </div>
157 </article>
158
159 <article id="gravity-code" title="Gravity: Code">
160 <h1>Gravity: Code</h1>
161
162 <div class="simplebox">
163 <pre>
164   window.addEventListener("<a href="https://developer.mozilla.org/en-US/docs/Web/Events/deviceorientation">deviceorientation</a>", this.orientEvent, true);
165   window.addEventListener("<a href="https://developer.mozilla.org/en-US/docs/Web/Events/devicemotion">devicemotion</a>", this.motionEvent, true);
166
167   orientEvent: function(orientData) {
168     orientData.alpha / .beta / .gamma (in °)
169   },
170   motionEvent: function(event) {
171     event.accelerationIncludingGravity.x / .y / .z (in m/s²)
172   },
173
174   window.removeEventListener("deviceorientation", this.orientEvent, true);
175   window.removeEventListener("devicemotion", this.motionEvent, true);
176 </pre>
177 </div>
178 </article>
179
180 <article id="sound" title="Sound Module">
181 <h1>Sound Module</h1>
182
183 <div class="simplebox">
184 <p>Microphone</p>
185 <p>APIs: <a href="https://developer.mozilla.org/en-US/docs/Web/Guide/API/WebRTC">WebRTC</a>(getUserMedia),
186 <a href="https://developer.mozilla.org/en-US/docs/Web/API/Web_Audio_API">WebAudio</a></p>
187 <p>Permissions: audio-capture</p>
188 </div>
189 </article>
190
191 <article id="sound-code" title="Sound: Code">
192 <h1>Sound: Code</h1>
193
194 <div class="simplebox">
195 <pre>
196   <a href="https://developer.mozilla.org/en-US/docs/NavigatorUserMedia.getUserMedia">navigator.getUserMedia</a>({ audio: true },
197     function(aLocalMediaStream) {
198       gModSound.mAudio.stream = aLocalMediaStream;
199       gModSound.mAudio.context = new <a href="https://developer.mozilla.org/en-US/docs/Web/API/AudioContext">window.AudioContext</a>();
200       gModSound.mAudio.input =
201           gModSound.mAudio.context.createMediaStreamSource(gModSound.mAudio.stream);
202       gModSound.mAudio.analyzer = gModSound.mAudio.context<a href="https://developer.mozilla.org/en-US/docs/Web/API/AnalyserNode">.createAnalyser</a>();
203       gModSound.mAudio.input.connect(gModSound.mAudio.analyzer);
204     },
205     function(err) { ... }
206   );
207
208   // in window.requestAnimationFrame():
209   var data = new Uint8Array(gModSound.mAudio.frequencySlices);
210   gModSound.mAudio.analyzer<a href="https://developer.mozilla.org/en-US/docs/Web/API/AnalyserNode.getByteFrequencyData">.getByteFrequencyData</a>(data);
211   // ... do something with data ...
212
213   gModSound.mAudio.stream.stop();
214 </pre>
215 </div>
216 </article>
217
218 <article id="environment" title="Environment Module">
219 <h1>Environment Module</h1>
220
221 <div class="simplebox">
222 <p>Light, Proximity; Flashlight</p>
223 <p>APIs: <a href="https://developer.mozilla.org/en-US/docs/Web/API/DeviceLightEvent">devicelight</a>,
224 <a href="https://developer.mozilla.org/en-US/docs/Web/API/DeviceProximityEvent">deviceproximity</a> events;
225 <a href="https://developer.mozilla.org/en-US/docs/Web/API/Camera_API">Camera API</a></p>
226 <p>Permissions: ---; camera (for Flash)</p>
227 </div>
228 </article>
229
230 <article id="environment-code" title="Environment: Code">
231 <h1>Environment: Code</h1>
232
233 <div class="simplebox">
234 <pre>
235   window.addEventListener("<a href="https://developer.mozilla.org/en-US/docs/Web/Events/devicelight">devicelight</a>", this.lightEvent, true);
236   window.addEventListener("<a href="https://developer.mozilla.org/en-US/docs/Web/Events/deviceproximity">deviceproximity</a>", this.proxEvent, true);
237
238   lightEvent: function(lightData) {
239     lightData.value (in lux)
240   },
241   proxEvent: function(proxData) {
242     proxData.min &lt;= .value &lt;= .max (in cm)
243   },
244
245   window.removeEventListener("devicelight", this.lightEvent, true);
246   window.removeEventListener("deviceproximity", this.proxEvent, true);
247
248   // flash/torch code works via <a href="https://developer.mozilla.org/en-US/docs/Web/API/CameraManager.getCamera">navigator.mozCameras.getCamera</a>
249   // flaky and subject to change, please consult code on github
250 </pre>
251 </div>
252 </article>
253
254 <article id="device" title="Device Module">
255 <h1>Device Module</h1>
256
257 <div class="simplebox">
258 <p>Battery</p>
259 <p>APIs: <a href="https://developer.mozilla.org/en-US/docs/Web/API/Battery_Status_API">Battery Status API</a></p>
260 <p>Permissions: ---</p>
261 </div>
262 </article>
263
264 <article id="device-code" title="Device: Code">
265 <h1>Device: Code</h1>
266
267 <div class="simplebox">
268 <pre>
269   0 &lt;= <a href="https://developer.mozilla.org/en-US/docs/Web/API/Navigator.battery">navigator.battery</a>.level &lt;= 1
270
271   .charging (true/false)
272
273   .chargingTime (in s; 0 or Infinity: unknown)
274
275   .dischargingTime (in s; 0 or Infinity: unknown)
276 </pre>
277 </div>
278 </article>
279
280 <article id="end" title="The End">
281
282 <div class="simplebox">
283 <h1 class="cent" style="position: relative; z-index: 3; color: #FFFFFF; font-size: 2.5em;">Questions?</h1>
284 <img src="mister_tricorder.jpg" class="sshot"
285      style="width: 100%; margin-top: -4.5em; position: relative; z-index: 1;"
286      alt="Data &amp; Mister Tricorder">
287 </div>
288 </article>
289
290 </body>
291 </html>