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home-assistant.github.io/components/mqtt.html
Paulus Schoutsen adcde053bb Site updated at 2015-10-27 04:59:24 UTC
2015-10-26 21:59:24 -07:00

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<h1 class="title indent">
MQTT
</h1>
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<hr class="divider">
<p>MQTT (aka MQ Telemetry Transport) is a machine-to-machine or &ldquo;Internet of Things&rdquo; connectivity protocol on top of TCP/IP. It allows extremely lightweight publish/subscribe messaging transport.</p>
<p>To integrate MQTT into Home Assistant, add the following section to your <code>configuration.yaml</code> file:</p>
<pre><code class="yaml"># Example configuration.yaml entry
mqtt:
broker: IP_ADDRESS_BROKER
port: 1883
client_id: home-assistant-1
keepalive: 60
username: USERNAME
password: PASSWORD
certificate: /home/paulus/dev/addtrustexternalcaroot.crt
</code></pre>
<p>Configuration variables:</p>
<ul>
<li><strong>broker</strong> (<em>Required</em>): The IP address of your MQTT broker, e.g. 192.168.1.32.</li>
<li><strong>port</strong> (<em>Optional</em>): The network port to connect to. Default is 1883.</li>
<li><strong>client_id</strong> (<em>Optional</em>): Client ID that Home Assistant will use. Has to be unique on the server. Default is a random generated one.</li>
<li><strong>keepalive</strong> (<em>Optional</em>): The keep alive in seconds for this client. Default is 60.</li>
<li><strong>username</strong> (<em>Optional</em>): The username to use with your MQTT broker.</li>
<li><strong>password</strong> (<em>Optional</em>): The corresponding password for the username to use with your MQTT broker.</li>
<li><strong>certificate</strong> (<em>Optional</em>): Certificate to use to encrypt communication with the broker.</li>
</ul>
<h2><a class='title-link' name='picking-a-broker' href='#picking-a-broker'></a> Picking a broker</h2>
<p>The MQTT component needs you to run an MQTT broker for Home Assistant to connect to.</p>
<p>There are three options, each with various degrees of ease of setup and privacy.</p>
<h4><a class='title-link' name='run-your-own' href='#run-your-own'></a> Run your own</h4>
<p>Most private option but requires a bit more work. There are two free and open-source brokers to pick
from: <a href="http://mosquitto.org/">Mosquitto</a> and <a href="http://www.mosca.io/">Mosca</a>.</p>
<pre><code class="yaml"># Example configuration.yaml entry
mqtt:
broker: 192.168.1.100
port: 1883
client_id: home-assistant-1
keepalive: 60
username: USERNAME
password: PASSWORD
</code></pre>
<h4><a class='title-link' name='public-mqtt' href='#public-mqtt'></a> Public MQTT</h4>
<p>The Mosquitto project runs a <a href="http://test.mosquitto.org">public broker</a>. Easiest to setup but there
is 0 privacy as all messages are public. Use this only for testing purposes and not for real tracking
of your devices.</p>
<pre><code class="yaml">mqtt:
broker: test.mosquitto.org
port: 1883
# Optional, if you want encryption
# (doesn't really matter because broker is public)
port: 8883
# Download certificate from http://test.mosquitto.org/ssl/mosquitto.org.crt
certificate: /home/paulus/downloads/mosquitto.org.crt
</code></pre>
<h4><a class='title-link' name='cloudmqtt' href='#cloudmqtt'></a> CloudMQTT</h4>
<p><a href="https://www.cloudmqtt.com">CloudMQTT</a> is a hosted private MQTT instance that is free up to 10
connected devices. This is enough to get started with for example
<a href="/components/device_tracker.owntracks.html">OwnTracks</a> and give you a taste of what is possible.</p>
<p class='note'>
Home Assistant is not affiliated with CloudMQTT nor will receive any kickbacks.
</p>
<ol>
<li><a href="https://customer.cloudmqtt.com/login">Create an account</a> (no payment details needed)</li>
<li><a href="https://customer.cloudmqtt.com/subscription/create">Create a new CloudMQTT instance</a>
(Cute Cat is the free plan)</li>
<li>From the control panel, click on the <em>Details</em> button.</li>
<li>Create unique users for Home Assistant and each phone to connect<br>(CloudMQTT does not allow two
connections from the same user)
<ol type="a">
<li> Under manage users, fill in username, password and click add</li>
<li> Under ACLs, select user, topic <code>#</code>, check &lsquo;read access&rsquo; and &lsquo;write access&rsquo;</li>
</ol>
</li>
<li>Copy the instance info to your configuration.yaml:
<code>yaml
mqtt:
broker: &lt;Server&gt;
port: &lt;SSL Port&gt;
username: &lt;User&gt;
password: &lt;Password&gt;
</code></li>
</ol>
<p class='note'>
Home Assistant will automatically load the correct certificate if you connect to an encrypted channel
of CloudMQTT (port range 20 000 - 30 000).
</p>
<h2><a class='title-link' name='building-on-top-of-mqtt' href='#building-on-top-of-mqtt'></a> Building on top of MQTT</h2>
<ul>
<li><a href="/components/sensor.mqtt.html">MQTT Sensor</a></li>
<li><a href="/components/switch.mqtt.html">MQTT Switch</a></li>
<li><a href="/components/device_tracker.mqtt.html">MQTT Device Tracker</a></li>
<li><a href="/components/device_tracker.owntracks.html">OwnTracks Device Tracker</a></li>
<li><a href="/components/automation.html#mqtt-based-automation">MQTT automation rule</a></li>
<li><a href="/components/alarm_control_panel.mqtt.html">MQTT alarm</a></li>
<li>Integrating it into a component. See the <a href="https://github.com/balloob/home-assistant/blob/dev/config/custom_components/mqtt_example.py">MQTT example component</a> how to do this.</li>
</ul>
<h2><a class='title-link' name='testing-your-setup' href='#testing-your-setup'></a> Testing your setup</h2>
<p>For debugging purposes <code>mosquitto</code> is shipping commandline tools to send and recieve MQTT messages. For sending test messages to a broker running on localhost:</p>
<pre><code class="bash">mosquitto_pub -h 127.0.0.1 -t home-assistant/switch/1/on -m "Switch is ON"
</code></pre>
<p>Another way to send MQTT messages by hand is to use the &ldquo;Developer Tools&rdquo; in the Frontend. Choose &ldquo;Call Service&rdquo; and then <code>mqtt/mqtt_send</code> under &ldquo;Available Services&rdquo;. Enter something similar to the example below into the &ldquo;Service Data&rdquo; field.</p>
<pre><code class="json">{
"topic":"home-assistant/switch/1/on",
"payload":"Switch is ON"
}
</code></pre>
<p>The message should appear on the bus:</p>
<pre><code class="bash">... [homeassistant] Bus:Handling &lt;Event MQTT_MESSAGE_RECEIVED[L]: topic=home-assistant/switch/1/on, qos=0, payload=Switch is ON&gt;
</code></pre>
<p>For reading all messages sent on the topic <code>home-assistant</code> to a broker running on localhost:</p>
<pre><code class="bash">mosquitto_sub -h 127.0.0.1 -v -t "home-assistant/#"
</code></pre>
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<h1 class='title delta'>Related components</h1>
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<li><a href='/components/alarm_control_panel.mqtt.html'>
MQTT Alarm Control Panel
</a></li>
<li><a href='/components/device_tracker.mqtt.html'>
MQTT device tracker
</a></li>
<li><a href='/components/sensor.mqtt.html'>
MQTT sensor
</a></li>
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MQTT switch
</a></li>
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<a href='/components/isy994.html'>ISY994 Controller</a>
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MQTT
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