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<meta name="description" content="Instructions how to integrate One wire (1-wire) sensors into Home Assistant.">
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<h1 class="title indent">
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One Wire Sensor
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</h1>
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<p>The <code class="highlighter-rouge">onewire</code> platform supports sensors which are using the One wire (1-wire) bus for communication.</p>
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<p>Supported devices:</p>
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<ul>
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<li><a href="https://datasheets.maximintegrated.com/en/ds/DS18B20.pdf">DS18B20</a></li>
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<li><a href="https://www.maximintegrated.com/en/products/analog/sensors-and-sensor-interface/DS18S20.html">DS18S20</a></li>
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<li><a href="https://datasheets.maximintegrated.com/en/ds/DS1822.pdf">DS1822</a></li>
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<li><a href="https://datasheets.maximintegrated.com/en/ds/DS1825.pdf">DS1825</a></li>
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<li><a href="https://datasheets.maximintegrated.com/en/ds/DS28EA00.pdf">DS28EA00</a> temperature sensors</li>
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</ul>
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<p>The 1-Wire bus can be connected directly to the IO pins of Raspberry Pi or using dedicated interface adapter (e.g <a href="https://datasheets.maximintegrated.com/en/ds/DS9490-DS9490R.pdf">DS9490R</a>). When an interface adapter is used, sensors can be accessed on Linux hosts via <a href="http://owfs.org/">owfs 1-Wire file system</a>. When using an interface adapter and the owfs, the ‘mount_dir’ option must be configured to correspond a directory, where owfs device tree has been mounted. If you are using Raspberry Pi and IO pin connected bus setup, don’t use the ‘mount_dir’ option.</p>
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<p>To enable One wire sensors in your installation, add the following to your <code class="highlighter-rouge">configuration.yaml</code> file:</p>
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<div class="language-yaml highlighter-rouge"><pre class="highlight"><code><span class="c1"># Example configuration.yaml entry</span>
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<span class="s">sensor</span><span class="pi">:</span>
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<span class="pi">-</span> <span class="s">platform</span><span class="pi">:</span> <span class="s">onewire</span>
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<span class="s">names</span><span class="pi">:</span>
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<span class="s">some_id</span><span class="pi">:</span> <span class="s">your name</span>
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</code></pre>
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</div>
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<p>Configuration variables:</p>
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<ul>
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<li><strong>names</strong> array (<em>Optional</em>): ID and friendly name of your sensors.</li>
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<li><strong>mount_dir</strong> (<em>Optional</em>): Location of device tree if owfs driver used.</li>
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</ul>
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</article>
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<aside id="sidebar" class="grid__item one-third lap-one-whole palm-one-whole">
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<div class="grid">
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<section class="aside-module grid__item one-whole lap-one-half">
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<div class='edit-github'><a href='https://github.com/home-assistant/home-assistant.github.io/tree/current/source/_components/sensor.onewire.markdown'>Edit this page on GitHub</a></div>
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<div class='brand-logo-container section'>
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<img src='/images/supported_brands/onewire.png' />
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</div>
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<div class='section'>
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Introduced in release: 0.12
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</div>
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<div class='section'>
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<h1 class="title delta">Category Sensor</h1>
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<ul class='divided'>
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<li>
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<a href='/components/sensor.apcupsd/'>APCUPSd Sensor</a>
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</li>
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<li>
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<a href='/components/sensor.api_stream/'>API Stream Sensor</a>
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</li>
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<li>
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<a href='/components/sensor.arwn/'>ARWN Sensor</a>
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</li>
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<li>
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<a href='/components/sensor.bbox/'>Bbox Sensor</a>
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</li>
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<li>
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<a href='/components/sensor.bloomsky/'>BloomSky Sensor</a>
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</li>
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<li>
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<a href='/components/sensor.broadlink/'>Broadlink RM2 and A1 sensor</a>
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</li>
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<li>
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<a href='/components/sensor.command_line/'>Command line Sensor</a>
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</li>
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<li>
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<a href='/components/sensor.dweet/'>Dweet.io</a>
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</li>
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<li>
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<a href='/components/sensor.emoncms/'>Emoncms Sensor</a>
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</li>
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<li>
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<a href='/components/sensor.enocean/'>EnOcean Sensor</a>
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</li>
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<li>
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<a href='/components/sensor.envisalink/'>Envisalink Sensor</a>
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</li>
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<li>
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<a href='/components/sensor.gpsd/'>GPSD</a>
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</li>
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<li>
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<a href='/components/sensor.http/'>HTTP Sensor</a>
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</li>
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<li>
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<a href='/components/sensor.haveibeenpwned/'>HaveIBeenPwned Sensor</a>
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</li>
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<li>
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<a href='/components/sensor.homematic/'>Homematic Sensor</a>
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</li>
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<li>
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<a href='/components/sensor.imap_email_content/'>IMAP Email Content</a>
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</li>
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<li>
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<a href='/components/sensor.imap/'>IMAP Unread E-mail</a>
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</li>
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<li>
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<a href='/components/sensor.isy994/'>ISY994 Sensor</a>
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</li>
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<li>
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<a href='/components/sensor.influxdb/'>InfluxDB Sensor</a>
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</li>
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<li>
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<a href='/components/sensor.iss/'>International Space Station Sensor</a>
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</li>
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<li>
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<a href='/components/sensor.mhz19/'>MH-Z19 CO2 Sensor</a>
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</li>
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<li>
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<a href='/components/sensor.mqtt/'>MQTT Sensor</a>
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</li>
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<li>
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<a href='/components/sensor.min_max/'>Min/max Sensor</a>
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</li>
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<li>
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<a href='/components/sensor.modbus/'>Modbus Sensor</a>
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</li>
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<li>
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<a href='/components/sensor.moldindicator/'>Mold Indicator</a>
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</li>
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<li>
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<a href='/components/sensor.mysensors/'>MySensors Sensor</a>
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</li>
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<li>
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<a href='/components/sensor.nut/'>NUT Sensor</a>
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</li>
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<li>
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<a href='/components/sensor.neato/'>Neato Robotics Sensor</a>
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</li>
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<li>
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<a href='/components/sensor.nest/'>Nest Sensor</a>
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</li>
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<li>
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<a href='/components/sensor.octoprint/'>OctoPrint Sensor</a>
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</li>
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<li>
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One wire Sensor
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</li>
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<li>
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<a href='/components/sensor.pilight/'>Pilight Sensor</a>
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</li>
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<li>
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<a href='/components/sensor.rest/'>RESTful Sensor</a>
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</li>
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<li>
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<a href='/components/sensor.rfxtrx/'>RFXtrx Sensor</a>
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</li>
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<li>
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<a href='/components/sensor.random/'>Random Sensor</a>
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</li>
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<li>
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<a href='/components/sensor.scrape/'>Scrape Sensor</a>
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</li>
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<li>
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<a href='/components/sensor.sensehat/'>Sense HAT</a>
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</li>
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<li>
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<a href='/components/sensor.sleepiq/'>SleepIQ Sensor</a>
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</li>
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<li>
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<a href='/components/sensor.sonarr/'>Sonarr Sensor</a>
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</li>
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<li>
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<a href='/components/sensor.statistics/'>Statistics Sensor</a>
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</li>
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<li>
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<a href='/components/sensor.synologydsm/'>SynologyDSM Sensor</a>
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</li>
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<li>
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<a href='/components/sensor.tcp/'>TCP Sensor</a>
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</li>
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<li>
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<a href='/components/sensor.temper/'>TEMPer Sensor</a>
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</li>
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<li>
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<a href='/components/sensor.tellstick/'>TellStick Sensor</a>
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</li>
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<li>
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<a href='/components/sensor.tellduslive/'>Telldus Live sensor</a>
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</li>
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<li>
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<a href='/components/sensor.template/'>Template Sensor</a>
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</li>
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<li>
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<a href='/components/sensor.thinkingcleaner/'>Thinking Cleaner sensor</a>
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</li>
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<li>
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<a href='/components/sensor.usps/'>USPS Sensor</a>
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</li>
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<li>
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<a href='/components/sensor.vera/'>Vera Sensor</a>
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</li>
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<li>
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<a href='/components/sensor.verisure/'>Verisure Sensor</a>
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</li>
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<li>
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<a href='/components/sensor.wink/'>Wink Sensor</a>
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</li>
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<li>
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<a href='/components/sensor.waqi/'>World Air Quality Index</a>
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</li>
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<li>
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<a href='/components/sensor.zwave/'>Z-Wave Sensor</a>
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</li>
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<li>
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<a href='/components/sensor.zigbee/'>ZigBee Sensor</a>
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</li>
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<li>
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<a href='/components/sensor.zoneminder/'>ZoneMinder Sensor</a>
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</li>
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<li>
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<a href='/components/sensor.arest/'>aREST Sensor</a>
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</li>
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<li>
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<a href='/components/sensor.mfi/'>mFi Sensor</a>
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</li>
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</ul>
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</div>
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</section>
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