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<title>Eclipse Ditto: Digital Twins as part of an open IoT platform</title>
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<meta name="author" content="Thomas Jäckle">
<meta name="date" content="2020-04-216">
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<body>
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<!-- 2. Create hidden header/footer <div> -->
<div id="hidden" style="display:none;">
<div id="header">
<div id="header-left"><img src="../../images/ditto.svg" style="width: 80px; padding-top: 10px; padding-left: 10px" alt="Ditto logo"></div>
<div id="header-right"><img src="../../images/2020-04-16-Logo_TTVC_color.png" style="width: 140px; padding-top: 10px; padding-right: 10px" alt="Eclipse IoT logo"></div>
<!-- <div id="header-right"><img src="../../images/iot_logo.svg" style="width: 120px; padding-top: 10px; padding-right: 10px" alt="Eclipse IoT logo"></div>-->
</div>
</div>
<!-- Any section element inside of this container is displayed as a slide -->
<div class="slides">
<!-- Section: Intro -->
<section>
<section id="title" class="new-chapter" data-background="../bg-images/background-twin-small.jpg" data-state="chapter-background">
<!-- background source: https://unsplash.com/collections/425779/iot -->
<h1 style="line-height: 1em">
<img src="../../images/iot_logo.svg" style="width: 15%;vertical-align: top; padding-right: 20px" alt="Eclipse IoT">
<img src="../../images/ditto.svg" style="width: 15%;vertical-align: middle" alt="Eclipse Ditto">
</h1>
<h1 style="font-size: 1.5em;">Digital Twins as part of an open IoT platform</h1>
<img src="../../images/2020-04-16-Logo_TTVC_color.png" alt="The Things Network Virtual Conference" style="width: 35%;padding-top:0.5em" />
<h2 style="font-size: 0.8em">16.04.2020</h2>
</section>
<!-- <section id="whoami" class="new-chapter">-->
<!-- <h2>who am I?</h2>-->
<!-- <br/>-->
<!-- <div style="float:left; width: 25%;">-->
<!-- <img src="../images/thjaeckle_400x400.jpg" alt="Thomas Jäckle" style="width: 100%; border-radius: 50%" />-->
<!-- <h4>Thomas Jäckle</h4>-->
<!-- <h4><a href="https://twitter.com/thjaeckle">@thjaeckle</a></h4>-->
<!-- <br style="clear: both"/>-->
<!-- </div>-->
<!-- <div style="float:right; width: 70%;">-->
<!-- <img src="//www.brand.bosch.com/images/icons/bosch-logo.png" alt="Bosch logo" style="width: 30%; float: right; padding-left: 2px; margin-top: -1em"/>-->
<!-- <h4>software developer <br/>@ Bosch.IO</h4>-->
<!-- <h4 style="padding-top:1em">project lead of Eclipse Ditto</h4>-->
<!-- <h4 style="padding-top:1em">lead developer of commercial service<br/>"Bosch IoT Things"</h4>-->
<!-- </div>-->
<!-- </section>-->
<section id="agenda" class="new-chapter">
<h2>agenda</h2>
<br/>
<ol>
<!-- <li><a href="#motivation">Motivation</a></li>-->
<li><a href="#twin">Digital Twins</a></li>
<li><a href="#ditto">Eclipse Ditto</a></li>
<li><a href="#ditto-ttn">Ditto + TTN</a></li>
<li><a href="#hands-on">Hands-on</a></li>
<li><a href="#wrap-up">Wrap up</a></li>
</ol>
</section>
</section>
<!-- Section: Motivation -->
<!-- <section style="clear: both;">-->
<!-- <section id="motivation" class="new-chapter" data-background="../bg-images/background-cloud-small.jpg"-->
<!-- data-state="chapter-background">-->
<!-- <!– background source: http://wallpapercave.com/wp/WkziiJQ.jpg –>-->
<!-- <h1>Motivation</h1>-->
<!-- <br/>-->
<!-- <h2>turn physical devices into services</h2>-->
<!-- </section>-->
<!-- <section id="motivation-0" style="clear: both;">-->
<!-- <h2>IoT</h2>-->
<!-- <br/>-->
<!-- <h3>connecting <b>things</b> from various domains to the <b>Internet</b> happens</h3>-->
<!-- <div class="fragment" style="margin-top: 1em;">-->
<!-- <ul>-->
<!-- <li>on devices</li>-->
<!-- <li>on the edge (e.g. gateways)</li>-->
<!-- <li>in the back-end (a.k.a. "cloud")</li>-->
<!-- <li>near the user (apps, uis)</li>-->
<!-- </ul>-->
<!-- </div>-->
<!-- </section>-->
<!-- <section id="motivation-1" style="clear: both;">-->
<!-- <h2>IoT solution development</h2>-->
<!-- <br/>-->
<!-- <ul style="font-size: 0.9em;">-->
<!-- <li class="fragment">web and mobile apps need <b>APIs</b> optimized for the web</li>-->
<!-- <li class="fragment" style="margin-top: 0.5em;">security: <b>control</b> who has <b>access</b> to which aspects</li>-->
<!-- <li class="fragment" style="margin-top: 0.5em;">choose whether to <b>directly</b> communicate to devices <b>and</b> access <b>last known</b> state</li>-->
<!-- <li class="fragment" style="margin-top: 0.5em;">integrate with other systems by getting <b>notified</b> about changes/events</li>-->
<!-- <li class="fragment" style="margin-top: 0.5em;">connect and work with devices at <b>scale</b></li>-->
<!-- </ul>-->
<!-- </section>-->
<!-- <section id="motivation-2" style="clear: both;">-->
<!-- <h2>sounds complicated?</h2>-->
<!-- <br/>-->
<!-- <h3>let's find out if the Digital Twin pattern can help</h3>-->
<!-- <img src="../../images/ditto.svg" alt="Ditto logo" style="width: 200px">-->
<!-- </section>-->
<!-- </section>-->
<!-- Section: Digital Twins -->
<section style="clear: both;">
<section id="twin" class="new-chapter" data-background="../bg-images/background-twin-small.jpg"
data-state="chapter-background">
<!-- background source: https://unsplash.com/search/twin?photo=SmAiLn-nnJg -->
<h1>Digital Twins</h1>
<br/>
<ul>
<li class="fragment">digital representation of real physical devices</li>
<li class="fragment" style="margin-top: 1em;">act as broker for communicating with assets</li>
<li class="fragment" style="margin-top: 1em;">also: representation of processes or services</li>
<li class="fragment" style="margin-top: 1em;">applicable for both industrial and consumer-centric IoT scenarios</li>
</ul>
</section>
<!-- <section id="twin-1" style="clear: both;">-->
<!-- <h2>DT - our interpretation</h2>-->
<!-- <br/>-->
<!-- <ul>-->
<!-- <li class="fragment">a pattern for working with <b>things</b> in the IoT</li>-->
<!-- <li class="fragment" style="margin-top: 0.8em;">provide state <b>persistence</b> and <b>search</b> capabilities</li>-->
<!-- <li class="fragment" style="margin-top: 0.8em;">access twins always in an <b>authorized</b> way</li>-->
<!-- <li class="fragment" style="margin-top: 0.8em;">provide APIs - <b>Device as a Service</b></li>-->
<!-- <li class="fragment" style="margin-top: 0.8em;"><b>normalize</b> device payloads</li>-->
<!-- </ul>-->
<!-- </section>-->
</section>
<!-- Section: Ditto -->
<section style="clear: both;">
<section id="ditto" class="new-chapter" data-background="../bg-images/background-cloud-small.jpg"
data-state="chapter-background">
<!-- background source: http://wallpapercave.com/wp/WkziiJQ.jpg -->
<h1>Eclipse Ditto</h1>
<br/>
<h2>… where IoT devices and their Digital Twins get together</h2>
</section>
<section id="ditto-1" style="clear: both;">
<h2>in context</h2>
<div style="text-align: left; float: left; width: 65%">
<img src="../images/ditto-in-action-2020.png" style="width: 90%;padding-top:0.5em" alt="Ditto in action"/>
</div>
<div style="text-align: left; float: right; width: 35%">
<p style="padding-top:3.5em">Ditto as <br/>Digital Twin<br/> "middleware"</p>
</div>
</section>
<section id="ditto-2" style="clear: both;">
<h2>turn device data into APIs</h2>
<div style="text-align: left; float: left; width: 38%">
<pre style="width: 100%; font-size: 0.45em;"><code class="hljs json">{
"thingId": "io.foo:car1",
"policyId": "io.foo:car1",
"attributes": {
"manufacturer": "Foo corp",
"productionData": {
"serialNo": 4711
}
},
"features": {
"temperature": {
"properties": {
"value": 23.42
}
}
}
}</code></pre>
<p style="text-align: center">JSON repr. of a Thing</p>
</div>
<div style="text-align: left; float: right; width: 60%" class="fragment">
<pre style="width: 105%; font-size: 0.45em;"><code class="hljs">GET/PUT/DELETE /api/2/things/io.foo:car1
/api/2/things/io.foo:car1/thingId
/api/2/things/io.foo:car1/policyId
/api/2/things/io.foo:car1/attributes
/api/2/things/io.foo:car1/attributes/manufacturer
/api/2/things/io.foo:car1/attributes/productionData
/api/2/things/io.foo:car1/attributes/productionData/serialNo
/api/2/things/io.foo:car1/features
/api/2/things/io.foo:car1/features/temperature
/api/2/things/io.foo:car1/features/temperature/properties
/api/2/things/io.foo:car1/features/temperature/properties/value
</code></pre>
<a href="https://www.eclipse.org/ditto/httpapi-concepts.html#endpoints" style="float: right;">→ docs</a>
</div>
</section>
<section id="ditto-3" style="clear: both;">
<h2>persistence of device state</h2>
<br/>
<div style="text-align: left; float: left; width: 48%">
<ul>
<li>devices are not always connected to the net</li>
<li class="fragment" data-fragment-index="1" style="margin-top: 1em;">applications always need to be able to access their data</li>
<li class="fragment" data-fragment-index="2" style="margin-top: 1em;"><b>twin</b> vs. <b>live</b> access on API level</li>
</ul>
</div>
<div class="fragment" data-fragment-index="2" style="text-align: left; float: right; width: 50%">
<img src="../../images/pages/protocol/ditto-twin-channel.png" style="width: 110%" alt="Ditto twin channel">
<img src="../../images/pages/protocol/ditto-live-channel.png" style="width: 80%;padding-left: 1em" alt="Ditto live channel">
</div>
</section>
<section id="ditto-4" style="clear: both">
<h2>authorization</h2>
<br/>
<div style="text-align: left; float: left; width: 58%">
<br/>
<ul>
<li>Ditto contains a built-in authorization mechanism (<b>Policies</b>)</li>
<li class="fragment" style="margin-top: 1em;">every API call is authorized</li>
</ul>
</div>
<div style="text-align: left; float: right; width: 40%">
<pre style="width: 110%; font-size: 0.3em;"><code class="hljs">{
"policyId": "io.foo:car1-policy",
"entries": {
"owner": {
"subjects": {
"nginx:admin": {
"type": "nginx basic auth user"
}
},
"resources": {
"thing:/": {
"grant": ["READ","WRITE"],
"revoke": []
},
"thing:/features/firmware": {
"grant": [],
"revoke": ["WRITE"]
},
"policy:/": {
"grant": ["READ","WRITE"],
"revoke": []
}
}
}
}
}</code></pre>
<a href="https://www.eclipse.org/ditto/basic-auth.html#authorization" style="float: right;">→ docs</a>
</div>
</section>
<section id="ditto-5" style="clear: both;">
<h2>search</h2>
<br/>
<div style="text-align: left; float: left; width: 40%">
<img src="../images/meme-dino.jpg" style="width: 80%;" alt="Meme Dino" />
<ul style="font-size: 0.7em">
<li>you must not</li>
<li>Ditto has you covered</li>
</ul>
</div>
<div style="text-align: left; float: right; width: 60%" class="fragment" data-fragment-index="1">
<pre style="width: 100%; font-size: 0.45em;"><code class="hljs javascript">GET /api/2/search/things
?filter=like(attributes/manufacturer,"Foo*")</code></pre>
<pre style="width: 100%; font-size: 0.45em;" class="fragment" data-fragment-index="2"><code class="hljs javascript">GET /api/2/search/things
?filter=and(
exists(attributes/manufacturer),
gt(features/temperature/properties/value,23.0)
)
&namespaces=io.foo
&option=sort(-_modified,-attributes/manufacturer)
&fields=thingId,attributes/manufacturer,_modified</code></pre>
</div>
<div class="fragment" data-fragment-index="2">
<ul style="font-size: 0.7em">
<li>search for arbitrary data with RQL query</li>
<li>Ditto again ensures authorization</li>
<li>apply field projection over the results</li>
<li>don't worry about indexing</li>
</ul>
<a href="https://www.eclipse.org/ditto/basic-search.html" style="float: right;">→ docs</a>
</div>
</section>
<section id="ditto-6" style="clear: both;">
<h2>get notified about changes</h2>
<br/>
<ul>
<li>notification via various channels: WebSocket, SSE, MQTT, AMQP, Kafka, HTTP hook</li>
<li class="fragment" style="margin-top: 1em;">server side filtering via RQL (same as in search)</li>
</ul>
<div class="fragment">
<pre style="width: 100%; font-size: 0.45em;margin-top: 1em"><code class="hljs javascript">var ws = new WebSocket("ws://ditto:ditto@localhost:80/ws/2");
ws.onopen = function(w) {
w.send('START-SEND-EVENTS?filter=gt(features/temperature/properties/value,25)');
};
ws.onmessage = function(msg) {
console.log('received: ' + msg.data);
};</code></pre>
<p style="text-align: left; font-size: 0.7em">example of WebSocket browser API</p>
<a href="https://www.eclipse.org/ditto/basic-changenotifications.html" style="float: right;">→ docs</a>
</div>
</section>
<section id="ditto-7" style="clear: both;">
<h2>payload normalization</h2>
<br/>
<div style="text-align: left; float: left; width: 70%">
<ul>
<li>devices send data in various formats</li>
<li class="fragment" style="margin-top: 0.8em;">Ditto provides structured APIs of <b>things</b> (attributes, features)</li>
<li class="fragment" style="margin-top: 0.8em;">devices don't need to be aware of Ditto</li>
</ul>
</div>
<div class="fragment">
<div style="text-align: left; float: right; width: 30%">
<img src="../images/Javascript_badge.svg" style="width: 100%; padding-top: 1em" alt="JavaScript logo">
<!-- img source: https://commons.wikimedia.org/wiki/File:Javascript_badge.svg -->
</div>
<ul style="clear: both; width: 100%">
<li style="margin-top: 1em;">incoming and outgoing data can be transformed</li>
</ul>
</div>
</section>
<section id="ditto-8" style="clear: both;">
<h2>nonfunctional</h2>
<br/>
<div style="text-align: left; float: left; width: 46%">
<img src="../../images/pages/architecture/context-overview.png" alt="Ditto context overview" />
</div>
<div style="text-align: left; float: right; width: 54%">
<ul style="font-size: 0.8em">
<li >modular architecture of Ditto services</li>
<li style="margin-top: 0.8em;">horizontal scalability of each Ditto service</li>
<li style="margin-top: 0.8em;">runtime dependency to MongoDB</li>
<li style="margin-top: 0.8em;">included monitoring (JVM metrics, roundtrips, MongoDB)</li>
<li style="margin-top: 0.8em;">codebase written in: Java</li>
</ul>
</div>
</section>
</section>
<!-- Section: Ditto + LoRaWAN -->
<section style="clear: both;">
<section id="ditto-ttn" class="new-chapter" data-background="../bg-images/background-cloud-small.jpg"
data-state="chapter-background">
<!-- background source: http://wallpapercave.com/wp/WkziiJQ.jpg -->
<h1>Eclipse Ditto +</h1>
<img src="../images/ttn-logo.png" alt="The Things Network logo" style="width: 40%"/>
</section>
<section id="ditto-ttn-1" style="clear: both;">
<h2>benefit from each other</h2>
<br/>
<ul>
<li>TTN solving low cost, wide range connectivity of devices</li>
<li class="fragment" data-fragment-index="1" style="margin-top: 0.5em;">Eclipse Ditto providing APIs for IoT (backend-, web-, mobile-) applications</li>
<li class="fragment" data-fragment-index="2" style="margin-top: 0.5em;">both provide free/community variants</li>
<li class="fragment" data-fragment-index="2" style="margin-top: 0.5em;">both provide commercial services</li>
</ul>
</section>
<section id="ditto-ttn-2" style="clear: both;">
<h2>integration variants</h2>
<br/>
<div style="text-align: center; float: left; width: 48%">
<h4>using TTN's HTTP integration</h4>
<img src="../images/ttn-hono-ditto.png" alt="TTN via Hono to Ditto" style="width: 70%"/>
<!-- <ul class="fragment" style="font-size: 0.7em">-->
<!-- <li>publish messages via HTTP to <a href="https://eclipse.org/hono" alt="Hono">Eclipse Hono</a> (a sister project in Eclipse IoT for "connecting large numbers of IoT devices to a back end")</li>-->
<!-- <li>Ditto consumes messages via AMQP 1.0 from Hono</li>-->
<!-- </ul>-->
</div>
<div class="fragment" style="text-align: center; float: right; width: 48%">
<h4>using TTN's MQTT broker</h4>
<img src="../images/ttn-ditto-via-mqtt.png" alt="TTN via MQTT to Ditto" style="width: 70%"/>
<!-- <ul class="fragment" style="font-size: 0.7em">-->
<!-- <li>add connection inside Eclipse Ditto to the TTN MQTT broker</li>-->
<!-- <li>Ditto consumes messages via MQTT 3.1.1 directly from TTN</li>-->
<!-- </ul>-->
<h4 class="fragment"><b>* used now</b> for the hands-on part</h4>
</div>
</section>
</section>
<!-- Section: Hands-on -->
<section style="clear: both;">
<section id="hands-on" class="new-chapter" data-background="../bg-images/background-demo-small.jpg" data-state="chapter-background">
<h1>hands-on time!</h1>
<br/>
<h3><a href="https://www.eclipse.org/ditto/2020-04-16-connecting-to-ttn-via-mqtt.html">Step-by-step blogpost</a></h3>
</section>
</section>
<!-- Section: Wrap up -->
<section style="clear: both;">
<section id="wrap-up" style="clear: both;">
<h1>Wrap up</h1>
<br/>
<ul>
<li>Digital Twins as pattern for simplifying IoT solution development</li>
<li style="margin-top: 1em;">Mission: provide Device-as-a-Service</li>
<li style="margin-top: 1em;">Eclipse Ditto as OpenSource framework for Digital Twins</li>
</ul>
</section>
<!-- <section id="bosch-iot-things" style="clear: both;">-->
<!-- <h2>Bosch IoT Things</h2>-->
<!-- <br/>-->
<!-- <div style="text-align: left; float: left; width: 31%; font-size: 0.6em">-->
<!-- <img src="../images/bosch-iot-things-2020.png" style="width: 100%" alt="Bosch IoT Things" />-->
<!-- <h4>freemium model</h4>-->
<!-- <h4>+operated 24/7</h4>-->
<!-- <h4>+support</h4>-->
<!-- <h4>+management UI</h4>-->
<!-- </div>-->
<!-- <div style="text-align: left; float: right; width: 68%">-->
<!-- <ul>-->
<!-- <li class="fragment">commercial cloud service offering of Eclipse Ditto</li>-->
<!-- <li class="fragment" style="margin-top: 1em;">part of the <a href="https://www.bosch-iot-suite.com">Bosch IoT Suite</a></li>-->
<!-- <li class="fragment" style="margin-top: 1em;">same team works on Ditto and commercialization</li>-->
<!-- <li class="fragment" style="margin-top: 1em;">evaluate Ditto by using free plan</li>-->
<!-- </ul>-->
<!-- </div>-->
<!-- </section>-->
</section>
<!-- Section: Questions and Answers -->
<section style="clear: both;">
<section id="q-a" class="new-chapter" data-background="../bg-images/background-conclusion-small.jpg"
data-state="chapter-background">
<br/>
<h3>thanks to The Things Network for organising this virtual conference</h3>
<br/>
<p>Links:</p>
<ul>
<li><a target="_blank" href="https://www.eclipse.org/ditto">Ditto website and documentation</a></li>
<li><a target="_blank" href="https://github.com/eclipse-ditto/ditto">GitHub</a> - please give us a star ;)</li>
<li><a target="_blank" href="https://gitter.im/eclipse/ditto">Chatroom to ask more questions</a></li>
<li><a target="_blank" href="https://developer.bosch-iot-suite.com/service/things/">Commercial offering incl. free plan</a></li>
</ul>
</section>
</section>
</div>
</div>
<div class="footer">
Copyright ©2020
<a href="https://www.bosch.io" target="_blank">Bosch.IO GmbH</a> All rights reserved. |
<a href="https://www.eclipse.org/ditto/intro-overview.html" target="_blank">Documentation</a> |
<a href="https://github.com/eclipse-ditto/ditto" target="_blank">GitHub</a> |
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