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AI on the Edge Device
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MQTT API
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Welcome
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Installation
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Initial Setup
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Hardware Compatibility
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Best Practice
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Configuration
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Configuration
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Reference Image
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Alignment References
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ROIs (Regions of Interest)
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Graphical Configuration
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Model Selection
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Over-The-Air (OTA) Update
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Advanced
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Advanced
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Parameters
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Integration into Home Assistant
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External LED
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Data Logging
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Living on the Edge
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Analog/Digital Transition on Water Meters
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Collect images to improve the models
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Learn a model with your own images
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Correction Algorithm
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Neural Network Types
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Additional Information
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Notification about new Releases
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Prometheus/OpenMetrics
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Troubleshooting
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Troubleshooting
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Reduced webinterface (error codes)
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Board status LED (blink codes)
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WLAN disconnect reasons
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Often observed issues
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Basic hardware/config issues
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Demo mode
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Quick Links
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Releases
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Create an Issue
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API's
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API's
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REST API
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MQTT API
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MQTT API
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Table of contents
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<a class="md-nav__link" href="#published-topics">1.1
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Published topics
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<a class="md-nav__link" href="#status">1.1.1
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Status
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<a class="md-nav__link" href="#result">1.1.2
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Result
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<a class="md-nav__link" href="#gpio">1.1.3
<span class="md-ellipsis">
GPIO
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GPIO/GPIO{PinNumber}
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Subscribed topics
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Control
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ctrl/flow_start
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<a class="md-nav__link" href="#ctrlset_prevalue">1.2.1.2
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ctrl/set_prevalue
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Status
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Result
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GPIO
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GPIO/GPIO{PinNumber}
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ctrl/flow_start
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ctrl/set_prevalue
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GPIO/GPIO{PinNumber}
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<h1 id="mqtt-api"><span class="enumerate-headings-plugin enumerate-heading-plugin">1.</span> MQTT API</h1>
<p>The device is capable to register to a MQTT broker to publish data and subscribe to specific topics.</p>
<div class="admonition note">
<p class="admonition-title">Note</p>
<p>Only MQTT v3.1.1 is supported.</p>
</div>
<p>The MQTT service has to be enabled and configured properly in the device configuration via web interface (<code>Settings</code> -&gt; <code>Configuration</code> -&gt; section <code>MQTT</code>)</p>
<p>The following parameters have to be defined:
* URI
* MainTopic (optional, if not set, the hostname is used)
* ClientID (optional, if not set, <code>AIOTED-</code> + the MAC address gets used to make sure the ID is unique)
* User (optional)
* Password (optional)
* RetainFlag (optional)</p>
<h2 id="published-topics"><span class="enumerate-headings-plugin enumerate-heading-plugin">1.1</span> Published topics</h2>
<h3 id="status"><span class="enumerate-headings-plugin enumerate-heading-plugin">1.1.1</span> Status</h3>
<p>The following overhead data are available under the main topic (i.e. <code>watermeter</code>):</p>
<table>
<thead>
<tr>
<th>Topic</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><code>watermeter/MAC</code></td>
<td>The MAC address of the ESP module.</td>
</tr>
<tr>
<td><code>watermeter/IP</code></td>
<td>The IP address of the ESP module.</td>
</tr>
<tr>
<td><code>watermeter/Hostname</code></td>
<td>The network host name of the ESP module.</td>
</tr>
<tr>
<td><code>watermeter/Interval</code></td>
<td>The round interval as configured during setup or in <a href="https://jomjol.github.io/AI-on-the-edge-device-docs/Parameters/#section-autotimer">Parameters -&gt; Interval</a>.</td>
</tr>
<tr>
<td><code>watermeter/Connection</code></td>
<td>Network connection status.</td>
</tr>
<tr>
<td><code>watermeter/Uptime</code></td>
<td>Seconds up since last boot.</td>
</tr>
<tr>
<td><code>watermeter/FreeMem</code></td>
<td>Free memory in kB.</td>
</tr>
<tr>
<td><code>watermeter/wifiRSSI</code></td>
<td>Quality of WiFi signal.</td>
</tr>
<tr>
<td><code>watermeter/CPUTemp</code></td>
<td>Temperature of the ESP CPU in degrees celsius.</td>
</tr>
</tbody>
</table>
<h3 id="result"><span class="enumerate-headings-plugin enumerate-heading-plugin">1.1.2</span> Result</h3>
<p>The following calculation data are available under the sup-topic <code>main</code> (i.e. <code>watermeter/main</code>):</p>
<table>
<thead>
<tr>
<th>Topic</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><code>watermeter/main/error</code></td>
<td>Informs about the flow status. On success, the value is <code>no error</code>.</td>
</tr>
<tr>
<td><code>watermeter/main/raw</code></td>
<td>The value <strong>before</strong> performing <a href="https://jomjol.github.io/AI-on-the-edge-device-docs/Parameters/section-postprocessing">post processing</a>.</td>
</tr>
<tr>
<td><code>watermeter/main/value</code></td>
<td>The value <strong>after</strong> performing <a href="https://jomjol.github.io/AI-on-the-edge-device-docs/Parameters/section-postprocessing">post processing</a>.</td>
</tr>
<tr>
<td><code>watermeter/main/rate</code></td>
<td>How much flow was consumed in one minute.</td>
</tr>
<tr>
<td><code>watermeter/main/rate_per_time_unit</code></td>
<td>How much flow was consumed in one minute. The time unit gets set with the Home Assistant Discovery, e.g. <code>h</code> (hours) or <code>m</code> (minutes).</td>
</tr>
<tr>
<td><code>watermeter/main/changeabsolut</code></td>
<td>Difference between the previous and actual read value.</td>
</tr>
<tr>
<td><code>watermeter/main/rate_per_digitization_round</code></td>
<td>How much flow was consumed in one minute.</td>
</tr>
<tr>
<td><code>watermeter/main/timestamp</code></td>
<td>Timestamp of the last valid reading (equal to timestamp of previous value)</td>
</tr>
<tr>
<td><code>watermeter/main/Status</code></td>
<td>Informs about the last performed step of the watermeter (i.e. <code>Flow finished</code>).</td>
</tr>
<tr>
<td><code>watermeter/main/json</code></td>
<td>This is a JSON formatted object containing the following values: <code>value</code>, <code>raw</code>, <code>pre</code>, <code>error</code>, <code>rate</code>, <code>timestamp</code>.</td>
</tr>
</tbody>
</table>
<h3 id="gpio"><span class="enumerate-headings-plugin enumerate-heading-plugin">1.1.3</span> GPIO</h3>
<p><code>MainTopic</code>/{GPIO topic}, e.g. <code>watermeter/GPIO/GPIO12</code></p>
<h4 id="gpiogpiopinnumber"><span class="enumerate-headings-plugin enumerate-heading-plugin">1.1.3.1</span> GPIO/GPIO{PinNumber}</h4>
<p>Depending on device configuration (<code>Settings</code> --&gt; <code>Configuration</code> --&gt; section <code>GPIO</code>)</p>
<h2 id="subscribed-topics"><span class="enumerate-headings-plugin enumerate-heading-plugin">1.2</span> Subscribed topics</h2>
<p><code>MainTopic</code>/{subscribed topic}, e.g. <code>watermeter/ctrl/flow_start</code></p>
<h3 id="control"><span class="enumerate-headings-plugin enumerate-heading-plugin">1.2.1</span> Control</h3>
<h4 id="ctrlflow_start"><span class="enumerate-headings-plugin enumerate-heading-plugin">1.2.1.1</span> ctrl/flow_start</h4>
<p>Trigger a flow start by publishing to this topic.</p>
<p><strong>Payload:</strong></p>
<ul>
<li>any character, length &gt; 0</li>
</ul>
<h4 id="ctrlset_prevalue"><span class="enumerate-headings-plugin enumerate-heading-plugin">1.2.1.2</span> ctrl/set_prevalue</h4>
<div class="admonition note">
<p class="admonition-title">Note</p>
<p>This feature is available since version <a href="https://github.com/jomjol/AI-on-the-edge-device/releases/tag/v15.2.0">15.2.0</a>.</p>
</div>
<p>Set the last valid value (previous value) to given value or the actual RAW value. Payload needs to be provided in JSON notation.</p>
<p><strong>Payload:</strong></p>
<ul>
<li>
<p>Set to given value (value &gt;= 0): <code>{"numbersname": "&lt;NUMBERSNAME&gt;", "value": &lt;VALUE&gt;}</code></p>
<ul>
<li><code>"numbersname":</code>Provide name of number sequence, e.g. <code>"main"</code> </li>
<li><code>"value":</code> provide the value to be set, eg. <code>12345.67890</code></li>
</ul>
</li>
<li>
<p>Set to actual RAW value (value &lt; 0, a valid RAW value is mandatory): <code>{"numbersname": "&lt;NUMBERSNAME&gt;", "value": -1}</code></p>
<ul>
<li><code>"numbersname":</code> Provide name of number sequence, e.g. <code>"main"</code> </li>
<li><code>"value":</code> Provide any negative number</li>
</ul>
</li>
</ul>
<h4 id="gpiogpiopinnumber_1"><span class="enumerate-headings-plugin enumerate-heading-plugin">1.2.1.3</span> GPIO/GPIO{PinNumber}</h4>
<p>Depending on device configuration (<code>Settings</code> --&gt; <code>Configuration</code> --&gt; section <code>GPIO</code>)</p>
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