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27 <article id="toc" title="Table of Contents">
28 <h1>Table of Contents</h1>
29 <h2>Firefox OS Tricorder</h2>
31 <div class="captionedbox">
32 <p class="captionedbox-caption">The following slides are available in this presentation:</p>
33 <div class="captionedbox-content">
38 <article id="index" title="Start Page">
39 <h1>Firefox OS Tricorder</h1>
40 <h2>Reading Device Sensor Data in JavaScript</h2>
42 <div class="simplebox">
43 <mark><a href="http://home.kairo.at/">Robert Kaiser</a></mark>,
44 "KaiRo" <kairo@kairo.at>
45 <br><small>Program Manager, Mozilla QA</small>
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">
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
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>
74 <article id="tricorder" title="Tricorder">
75 <h1>What is a Tricorder?</h1>
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>
86 <article id="fxos-tricorder" title="Firefox OS Tricorder">
87 <h1>Firefox OS Tricorder App</h1>
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>
96 <article id="ui" title="UI">
97 <h1>Firefox OS Tricorder UI</h1>
99 <div class="simplebox cent">
100 <img src="tricorder-ui.svg"
101 alt="Tricorder UI description">
105 <article id="module" title="Module">
108 <div class="simplebox">
110 <li>HTML (switch, display)</li>
113 <li>2 Methods: activate(), deactivate()</li>
120 <article id="position" title="Position Module">
121 <h1>Position Module</h1>
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>
130 <article id="position-code" title="Position: Code">
131 <h1>Position: Code</h1>
133 <div class="simplebox">
135 this.watchID = <a href="https://developer.mozilla.org/en-US/docs/Web/API/Geolocation.watchPosition">navigator.geolocation.watchPosition</a>(
137 position.coords.latitude / .longitude / .accuracy / ...
139 function(error) { ... },
140 {enableHighAccuracy: true, maximumAge: 10000, timeout: 60000}
143 navigator.geolocation.clearWatch(this.watchID);
148 <article id="gravity" title="Gravity Module">
149 <h1>Gravity Module</h1>
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>
159 <article id="gravity-code" title="Gravity: Code">
160 <h1>Gravity: Code</h1>
162 <div class="simplebox">
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);
167 orientEvent: function(orientData) {
168 orientData.alpha / .beta / .gamma (in °)
170 motionEvent: function(event) {
171 event.accelerationIncludingGravity.x / .y / .z (in m/s²)
174 window.removeEventListener("deviceorientation", this.orientEvent, true);
175 window.removeEventListener("devicemotion", this.motionEvent, true);
180 <article id="sound" title="Sound Module">
181 <h1>Sound Module</h1>
183 <div class="simplebox">
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>
191 <article id="sound-code" title="Sound: Code">
194 <div class="simplebox">
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);
205 function(err) { ... }
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 ...
213 gModSound.mAudio.stream.stop();
218 <article id="environment" title="Environment Module">
219 <h1>Environment Module</h1>
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>
230 <article id="environment-code" title="Environment: Code">
231 <h1>Environment: Code</h1>
233 <div class="simplebox">
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);
238 lightEvent: function(lightData) {
239 lightData.value (in lux)
241 proxEvent: function(proxData) {
242 proxData.min <= .value <= .max (in cm)
245 window.removeEventListener("devicelight", this.lightEvent, true);
246 window.removeEventListener("deviceproximity", this.proxEvent, true);
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
254 <article id="device" title="Device Module">
255 <h1>Device Module</h1>
257 <div class="simplebox">
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>
264 <article id="device-code" title="Device: Code">
265 <h1>Device: Code</h1>
267 <div class="simplebox">
269 0 <= <a href="https://developer.mozilla.org/en-US/docs/Web/API/Navigator.battery">navigator.battery</a>.level <= 1
271 .charging (true/false)
273 .chargingTime (in s; 0 or Infinity: unknown)
275 .dischargingTime (in s; 0 or Infinity: unknown)
280 <article id="end" title="The End">
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 & Mister Tricorder">