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<!-- Attention authors: Do not edit directly. Please add your changes to the appropriate source repository -->
<h1 id="stiebel-eltron-lwz-binding">Stiebel Eltron LWZ Binding</h1>
<p>This binding is used to communicate Stiebel Eltron LWZ heat pumps via a serial interface. The binding is inspired by the work of <a href="http://robert.penz.name/heat-pump-lwz">Monitoring a Stiebel Eltron LWZ</a> which is hosted at <a href="https://launchpad.net/heatpumpmonitor">Heatpumpmonitor</a> and is written in Python.</p>
<p>The following functionality has been implemented:</p>
<ul>
<li>reading all settings, status, time, and sensor data from the heat pump</li>
<li>protocol parse for different versions of LWZ is configurable via xml file. Other versions like 2.16, 4.09, 4.19, 4.38 should be easy to extend as parser configuration can be derived from <a href="http://bazaar.launchpad.net/~robert-penz-name/heatpumpmonitor/trunk/files/head:/protocolVersions/">protocol versions</a>.</li>
<li>changing settings of number setting parameter in the heat pump (still in beta)</li>
<li>updating the time in the heat pump (still in beta)</li>
</ul>
<p>The binding has been successfully tested with these hardware configurations:</p>
<ul>
<li><a href="https://www.stiebel-eltron.de/content/dam/ste/de/de/products/downloads/erneuerbare_energien/lueftung/Bedienungs-_u._Installationsanleitungen__LWZ_303-403__DM0000017729-ome.pdf">Stiebel Eltron LWZ 303</a> connected with <a href="http://robert.penz.name/heat-pump-lwz/">Mate-N-Lok RS232</a></li>
</ul>
<h2 id="binding-configuration">Binding Configuration</h2>
<p>This binding can be configured in the file <code class="highlighter-rouge">services/stiebelheatpump.cfg</code>.</p>
<table>
<thead>
<tr>
<th>Property</th>
<th>Default</th>
<th style="text-align: center">Required</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td>serialPort</td>
<td>
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