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| <h1>Telemetry end-to-end</h1> |
| <p class="lead">A package showing telemetry data acquisition end-to-end: Microcontroller firmware to cloud side data processing, using Drogue IoT and Apache Kafka in the process.</p></div> |
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| <p>The tutorial involves a lot of components, and a lot can go wrong, especially when it comes to bluetooth or network |
| connectivity.</p> |
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| <p>If you run into any blockers, we would kindly ask you to <a href="https://github.com/eclipse/packages/issues/new">reach out to us</a> |
| and report your findings.</p> |
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| <p>But, there is also a way to simulate the actual hardware and work around some requirements.</p> |
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| <h2 id="simulating-a-message">Simulating a message</h2> |
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| <p>You can manually simulate a message, that the IoT gateway would normally send after it acquired the information |
| from the sensor.</p> |
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| <nav><div class="nav nav-tabs" role="tablist"><a class="nav-item nav-link active" data-toggle="tab" id="variants-1-0-tab" href="#variants-1-0" aria-controls="variants-1-0">URL</a><a class="nav-item nav-link" data-toggle="tab" id="variants-1-1-tab" href="#variants-1-1" aria-controls="variants-1-1">drg</a></div></nav> |
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| <p>Ensure that the <code class="language-plaintext highlighter-rouge">DOMAIN</code> variable is still set to the value you used for the installation. Then execute the following |
| command:</p> |
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| <div class="clipboard"><pre><code>http --auth device-1@eclipse:foobar POST http://http-endpoint$DOMAIN/v1/foo temp:=23</code></pre></div> |
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| <p>If you are logged in with `drg`:</p> |
| <div class="clipboard"><pre><code>http --auth device-1@eclipse:foobar POST $(drg whoami -e http)/v1/foo temp:=23</code></pre></div> |
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| <div role="alert" class="alert alert-info"><h4 class="alert-heading">Different protocol </h4> |
| You might have notices, we used HTTP for this. However, Kura would send the message using MQTT. As one part of |
| Drogue IoT is normalizing the IoT protocol, the backend system didn't even notice. |
| </div> |
| |
| <h2 id="reading-directly-from-the-digital-twin">Reading directly from the digital twin</h2> |
| |
| <p>When data gets sent to Ditto, it gets forwarded to Streamsheets for visualization. Should the data not show up in |
| streamsheets, or should you run into issues with Streamsheets, you can also directly query the data in Ditto.</p> |
| |
| <p>Ensure that the <code class="language-plaintext highlighter-rouge">DOMAIN</code> variable is still set to the value you used for the installation. Then execute the following |
| command:</p> |
| |
| <div class="clipboard"><pre><code>curl -sL -X GET "http://ditto-default$DOMAIN/api/2/things/eclipse:device-1" -H "accept: application/json" -H "Authorization: Basic ZGl0dG86ZGl0dG8=" | jq</code></pre></div> |
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