home-assistant.github.io/components/arduino.html
2015-08-29 09:17:09 -07:00

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Arduino
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<p><img src='/images/supported_brands/arduino.png' class='brand pull-right' /></p>
<p>The <a href="https://www.arduino.cc/">Arduino</a> device family are microcontroller boards that are often based on the ATmega328 chip. They come with digital input/output pins (some can be used as PWM outputs), analog inputs, and a USB connection. The equipment depends on the <a href="https://www.arduino.cc/en/Main/Products">type</a> of board. The most common ones are the Arduino Uno and the Arduino Leonardo with 14 digital input/output pins and 6 analog input pins.</p>
<p>There are a lot of extensions (so called <a href="https://www.arduino.cc/en/Main/ArduinoShields">shields</a>) available. Those shields can be plugged-in into the existing connectors and stacked on top of each other. This makes it possible to expand the capabilities of the Arduino boards.</p>
<h2>Basic Configuration</h2>
<p>The arduino component is designed to let you use a directly attached board to your Home Assistant host over USB.</p>
<p>You need to have the <a href="https://github.com/firmata/">Firmata firmware</a> on your board. Please upload the <code>StandardFirmata</code> sketch to your board, please refer to the <a href="https://www.arduino.cc/en/Main/Howto">Arduino documentation</a> for further information.</p>
<p>To integrate an Arduino boards with Home Assistant, add the following section to your <code>configuration.yaml</code> file:</p>
<figure class='code'><figcaption><span></span></figcaption><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
<span class='line-number'>2</span>
<span class='line-number'>3</span>
</pre></td><td class='code'><pre><code class='yaml'><span class='line'><span class="c1"># Example configuration.yaml entry</span>
</span><span class='line'><span class="l-Scalar-Plain">arduino</span><span class="p-Indicator">:</span>
</span><span class='line'> <span class="l-Scalar-Plain">port</span><span class="p-Indicator">:</span> <span class="l-Scalar-Plain">/dev/ttyACM0</span>
</span></code></pre></td></tr></table></div></figure>
<p>The port where is your board connected to your Home Assistant host. If you are using an original Arduino the port will be named <code>ttyACM*</code>. The exact
number can be determined with <code>ls /dev/ttyACM*</code>.</p>
<figure class='code'><figcaption><span></span></figcaption><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
</pre></td><td class='code'><pre><code class='bash'><span class='line'>ls /dev/ttyACM*
</span></code></pre></td></tr></table></div></figure>
<p>If that is not working, check your <code>dmesg</code> or <code>journalctl -f</code> output. Keep in mind that Arduino clones are often using a different name for the port (e.g. <code>/dev/ttyUSB*</code>).</p>
<p class='note warning'>
A word of caution: The Arduino boards are not storing states. This means that with every initialization the pins are set to off/low.
</p>
<h2>Switch Configuration</h2>
<p>Support for switching pins is limited to high/on and low/off of the digital pins. PWM (pin 3,5,6,9,10, and 11 on a Arduino Uno) is not supported yet.</p>
<p>To enable the Arduino switch pins with Home Assistant, add the following section to your <code>configuration.yaml</code> file:</p>
<figure class='code'><figcaption><span></span></figcaption><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
<span class='line-number'>2</span>
<span class='line-number'>3</span>
<span class='line-number'>4</span>
<span class='line-number'>5</span>
<span class='line-number'>6</span>
<span class='line-number'>7</span>
<span class='line-number'>8</span>
<span class='line-number'>9</span>
<span class='line-number'>10</span>
</pre></td><td class='code'><pre><code class='yaml'><span class='line'><span class="c1"># Example configuration.yaml entry</span>
</span><span class='line'><span class="l-Scalar-Plain">switch</span><span class="p-Indicator">:</span>
</span><span class='line'> <span class="l-Scalar-Plain">platform</span><span class="p-Indicator">:</span> <span class="l-Scalar-Plain">arduino</span>
</span><span class='line'> <span class="l-Scalar-Plain">pins</span><span class="p-Indicator">:</span>
</span><span class='line'> <span class="l-Scalar-Plain">11</span><span class="p-Indicator">:</span>
</span><span class='line'> <span class="l-Scalar-Plain">name</span><span class="p-Indicator">:</span> <span class="l-Scalar-Plain">Fan Office</span>
</span><span class='line'> <span class="l-Scalar-Plain">type</span><span class="p-Indicator">:</span> <span class="l-Scalar-Plain">digital</span>
</span><span class='line'> <span class="l-Scalar-Plain">12</span><span class="p-Indicator">:</span>
</span><span class='line'> <span class="l-Scalar-Plain">name</span><span class="p-Indicator">:</span> <span class="l-Scalar-Plain">Light Desk</span>
</span><span class='line'> <span class="l-Scalar-Plain">type</span><span class="p-Indicator">:</span> <span class="l-Scalar-Plain">digital</span>
</span></code></pre></td></tr></table></div></figure>
<p>The digital pins are numbered from 0 to 13. The available pins are 2 till 13. For testing purposes you can use pin 13 because with that pin you can control the internal LED.</p>
<p>The name field of the pins array will be used in the frontend.</p>
<h2>Sensor Configuration</h2>
<p>The sensor platform allow you to get an numerical values from an analog input pin. Usually between 0 and 1024.</p>
<p>To enable an Arduino sensor with Home Assistant, add the following section to your <code>configuration.yaml</code> file:</p>
<figure class='code'><figcaption><span></span></figcaption><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
<span class='line-number'>2</span>
<span class='line-number'>3</span>
<span class='line-number'>4</span>
<span class='line-number'>5</span>
<span class='line-number'>6</span>
<span class='line-number'>7</span>
<span class='line-number'>8</span>
<span class='line-number'>9</span>
<span class='line-number'>10</span>
</pre></td><td class='code'><pre><code class='yaml'><span class='line'><span class="c1"># Example configuration.yaml entry</span>
</span><span class='line'><span class="l-Scalar-Plain">sensor</span><span class="p-Indicator">:</span>
</span><span class='line'> <span class="l-Scalar-Plain">platform</span><span class="p-Indicator">:</span> <span class="l-Scalar-Plain">arduino</span>
</span><span class='line'> <span class="l-Scalar-Plain">pins</span><span class="p-Indicator">:</span>
</span><span class='line'> <span class="l-Scalar-Plain">1</span><span class="p-Indicator">:</span>
</span><span class='line'> <span class="l-Scalar-Plain">name</span><span class="p-Indicator">:</span> <span class="l-Scalar-Plain">Door switch</span>
</span><span class='line'> <span class="l-Scalar-Plain">type</span><span class="p-Indicator">:</span> <span class="l-Scalar-Plain">analog</span>
</span><span class='line'> <span class="l-Scalar-Plain">0</span><span class="p-Indicator">:</span>
</span><span class='line'> <span class="l-Scalar-Plain">name</span><span class="p-Indicator">:</span> <span class="l-Scalar-Plain">Brightness</span>
</span><span class='line'> <span class="l-Scalar-Plain">type</span><span class="p-Indicator">:</span> <span class="l-Scalar-Plain">analog</span>
</span></code></pre></td></tr></table></div></figure>
<p>The 6 analog pins are numbered from A0 to A5.</p>
<p>The name field of the pins array will be used in the frontend.</p>
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