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<h1 id="air-quality-binding">Air Quality Binding</h1>
<p>This binding uses the <a href="http://aqicn.org">AQIcn.org service</a> for providing air quality information for any location worldwide.</p>
<p>The World Air Quality Index project is a social enterprise project started in 2007. Its mission is to promote Air Pollution awareness and provide a unified Air Quality information for the whole world.</p>
<p>The project is proving a transparent Air Quality information for more than 70 countries, covering more than 9000 stations in 600 major cities, via those two websites: <a href="http://aqicn.org">aqicn.org</a> and <a href="http://waqi.info">waqi.info</a>.</p>
<p>To use this binding, you first need to <a href="http://aqicn.org/data-platform/token/">register and get your API token</a>.</p>
<h2 id="supported-things">Supported Things</h2>
<p>There is exactly one supported thing type, which represents the air quality information for an observation location.
It has the <code class="highlighter-rouge">aqi</code> id.
Of course, you can add multiple Things, e.g. for measuring AQI for different locations.</p>
<h2 id="discovery">Discovery</h2>
<p>There is no discovery implemented.
You have to create your things manually.</p>
<h2 id="binding-configuration">Binding Configuration</h2>
<p>The binding has no configuration options, all configuration is done at Thing level.</p>
<h2 id="thing-configuration">Thing Configuration</h2>
<p>The thing has a few configuration parameters:</p>
<table>
<thead>
<tr>
<th>Parameter</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td>apikey</td>
<td>Data-platform token to access the AQIcn.org service. Mandatory.</td>
</tr>
<tr>
<td>location</td>
<td>Geo coordinates to be considered by the service.</td>
</tr>
<tr>
<td>stationId</td>
<td>Unique ID of the measuring station.</td>
</tr>
<tr>
<td>refresh</td>
<td>Refresh interval in minutes. Optional, the default value is 60 minutes.</td>
</tr>
</tbody>
</table>
<p>For the location parameter, the following syntax is allowed (comma separated latitude and longitude):</p>
<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>37.8,-122.4
37.8255,-122.456
</code></pre></div></div>
<p>If you always want to receive data from specific station and you know its unique ID, you can enter it instead of the coordinates.</p>
<h2 id="channels">Channels</h2>
<p>The AirQuality information that is retrieved is available as these channels:</p>
<table>
<thead>
<tr>
<th>Channel ID</th>
<th>Item Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td>aqiLevel</td>
<td>Number</td>
<td>Air Quality Index</td>
</tr>
<tr>
<td>aqiDescription</td>
<td>String</td>
<td>AQI Description</td>
</tr>
<tr>
<td>locationName</td>
<td>String</td>
<td>Nearest measuring station location</td>
</tr>
<tr>
<td>stationId</td>
<td>Number</td>
<td>Measuring station ID</td>
</tr>
<tr>
<td>stationLocation</td>
<td>Location</td>
<td>Latitude/longitude of measuring station</td>
</tr>
<tr>
<td>pm25</td>
<td>Number</td>
<td>Fine particles pollution level (PM2.5)</td>
</tr>
<tr>
<td>pm10</td>
<td>Number</td>
<td>Coarse dust particles pollution level (PM10)</td>
</tr>
<tr>
<td>o3</td>
<td>Number</td>
<td>Ozone level (O3)</td>
</tr>
<tr>
<td>no2</td>
<td>Number</td>
<td>Nitrogen Dioxide level (NO2)</td>
</tr>
<tr>
<td>co</td>
<td>Number</td>
<td>Carbon monoxide level (CO)</td>
</tr>
<tr>
<td>observationTime</td>
<td>DateTime</td>
<td>Observation date and time</td>
</tr>
<tr>
<td>temperature</td>
<td>Number</td>
<td>Temperature in Celsius degrees</td>
</tr>
<tr>
<td>pressure</td>
<td>Number</td>
<td>Pressure level</td>
</tr>
<tr>
<td>humidity</td>
<td>Number</td>
<td>Humidity level</td>
</tr>
</tbody>
</table>
<p><code class="highlighter-rouge">AQI Description</code> item provides a human-readable output that can be interpreted e.g. by MAP transformation.</p>
<p><em>Note that channels like</em> <code class="highlighter-rouge">pm25</code>, <code class="highlighter-rouge">pm10</code>, <code class="highlighter-rouge">o3</code>, <code class="highlighter-rouge">no2</code>, <code class="highlighter-rouge">co</code> <em>can sometimes return</em> <code class="highlighter-rouge">UNDEF</code> <em>value due to the fact that some stations don’
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