signalk-server
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An implementation of a [Signal K](http://signalk.org) server for boats.
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<ol class="chapter"><li class="chapter-item expanded affix "><a href="../index.html">Introduction</a></li><li class="chapter-item expanded affix "><li class="part-title">Getting Started</li><li class="chapter-item expanded "><a href="../installation/install.html"><strong aria-hidden="true">1.</strong> Installation</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../installation/raspberry_pi_installation.html" class="active"><strong aria-hidden="true">1.1.</strong> Installing on Raspberry Pi</a></li><li class="chapter-item expanded "><a href="../installation/updating.html"><strong aria-hidden="true">1.2.</strong> Updating your installation</a></li><li class="chapter-item expanded "><a href="../installation/command_line.html"><strong aria-hidden="true">1.3.</strong> Runtime environment & options</a></li></ol></li><li class="chapter-item expanded "><a href="../security.html"><strong aria-hidden="true">2.</strong> Security</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../setup/generating_tokens.html"><strong aria-hidden="true">2.1.</strong> Generating tokens</a></li></ol></li><li class="chapter-item expanded "><li class="part-title">Setup</li><li class="chapter-item expanded "><a href="../setup/configuration.html"><strong aria-hidden="true">3.</strong> Configuration</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../setup/seatalk/seatalk.html"><strong aria-hidden="true">3.1.</strong> Seatalk Connections</a></li></ol></li><li class="chapter-item expanded "><li class="part-title">Feature How Tos</li><li class="chapter-item expanded "><a href="../features/anchoralarm/anchoralarm.html"><strong aria-hidden="true">4.</strong> Anchor Alarm</a></li><li class="chapter-item expanded "><a href="../features/navdataserver/navdataserver.html"><strong aria-hidden="true">5.</strong> NMEA0183 Server</a></li><li class="chapter-item expanded "><a href="../features/datalogging/datalogging.html"><strong aria-hidden="true">6.</strong> Data Logging</a></li><li class="chapter-item expanded affix "><li class="part-title">Support</li><li class="chapter-item expanded "><a href="../support/help.html"><strong aria-hidden="true">7.</strong> Help & Support</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../support/faq.html"><strong aria-hidden="true">7.1.</strong> FAQs</a></li></ol></li><li class="chapter-item expanded "><a href="../support/sponsor.html"><strong aria-hidden="true">8.</strong> Sponsor</a></li><li class="chapter-item expanded affix "><li class="part-title">Develop</li><li class="chapter-item expanded "><a href="../develop/developer_notes.html"><strong aria-hidden="true">9.</strong> Notes for Developers</a></li><li class="chapter-item expanded "><a href="../whats_new.html"><strong aria-hidden="true">10.</strong> What's New in V2</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../breaking_changes.html"><strong aria-hidden="true">10.1.</strong> Changes & Deprecations</a></li></ol></li><li class="chapter-item expanded "><a href="../develop/webapps.html"><strong aria-hidden="true">11.</strong> WebApps</a></li><li class="chapter-item expanded "><a href="../develop/plugins/server_plugin.html"><strong aria-hidden="true">12.</strong> Plugins</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../develop/plugins/deltas.html"><strong aria-hidden="true">12.1.</strong> Processing Data</a></li><li class="chapter-item expanded "><a href="../develop/plugins/server_plugin_api.html"><strong aria-hidden="true">12.2.</strong> Server API</a></li><li class="chapter-item expanded "><a href="../develop/plugins/resource_provider_plugins.html"><strong aria-hidden="true">12.3.</strong> Resource Providers</a></li><li class="chapter-item expanded "><a href="../develop/rest-api/course_calculations.html"><strong aria-hidden="true">12.4.</strong> Course Providers</a></li><li class="chapter-item expanded "><a href="../develop/plugins/autopilot_provider_plugins.html"><strong aria-hidden="true">12.5.</strong> Autopilot Providers</a></li></ol></li><li class="chapter-item expanded "><a href="../develop/plugins/publishing.html"><strong aria-hidden="true">13.</strong> Publishing to the AppStore</a></li><li class="chapter-item expanded "><a href="../develop/rest-api/open_api.html"><strong aria-hidden="true">14.</strong> REST APIs</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../develop/rest-api/course_api.html"><strong aria-hidden="true">14.1.</strong> Course API</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../develop/rest-api/course_calculations.html"><strong aria-hidden="true">14.1.1.</strong> Course Calculations</a></li></ol></li><li class="chapter-item expanded "><a href="../develop/rest-api/resources_api.html"><strong aria-hidden="true">14.2.</strong> Resources API</a></li><li class="chapter-item expanded "><a href="../develop/rest-api/notifications_api.html"><strong aria-hidden="true">14.3.</strong> Notifications API</a></li><li class="chapter-item expanded "><a href="../develop/rest-api/autopilot_api.html"><strong aria-hidden="true">14.4.</strong> Autopilot API</a></li><li class="chapter-item expanded "><a href="../develop/rest-api/anchor_api.html"><strong aria-hidden="true">14.5.</strong> Anchor API</a></li></ol></li><li class="chapter-item expanded "><a href="../develop/contributing.html"><strong aria-hidden="true">15.</strong> Contribute</a></li></ol>
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<h1 class="menu-title">Signal K Server Documentation</h1>
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<h1 id="installation-on-raspberry-pi"><a class="header" href="#installation-on-raspberry-pi">Installation on Raspberry Pi</a></h1>
<p>Installation of Signal K server can consists of the following steps:</p>
<ol>
<li>Install the tools and libraries required to run the Signal K server (the dependencies)</li>
<li>Install a Signal K Server to process the Signal K data</li>
<li>Run the Setup script.</li>
</ol>
<p><em><strong>Important:</strong> If you are updating a Signal K server installation, especially if upgrading an installed version <= 1.40.0, <a href="./updating.html">please check here first</a>.</em></p>
<h3 id="prerequisites"><a class="header" href="#prerequisites">Prerequisites:</a></h3>
<p>Raspberry Pi OS is installed on the device.</p>
<p>For instructions on how to install the operating system <a href="https://www.raspberrypi.org/documentation/computers/getting-started.html#setting-up-your-raspberry-pi">can be found here.</a>.</p>
<p><em>Note: It is also possible to perform a "headless install" using <code>Raspberry Pi OS Lite</code> since the GUI for Signal K is browser based.</em></p>
<p>Once the OS installation has been completed, you are ready to commence.</p>
<hr />
<h2 id="install-the-dependencies"><a class="header" href="#install-the-dependencies">Install the Dependencies</a></h2>
<ol>
<li>
<p>Log in to the RPi Desktop and open a terminal.</p>
</li>
<li>
<p>Update the list of install packages.</p>
<pre><code>sudo apt update
</code></pre>
</li>
<li>
<p>Install NodeJS 18 and npm.</p>
<p>Follow <a href="https://github.com/nodesource/distributions#installation-instructions">instructions for Ubuntu and Debian based distributions like Raspberry Pi OS at NodeSource Distributions</a>.</p>
</li>
<li>
<p>Ensure that we're using the latest version of npm.</p>
<pre><code>sudo npm install -g npm@latest
</code></pre>
<p>Use the following command to check the versions of NodeJS and npm installed.</p>
<pre><code>node -v && npm -v
</code></pre>
<p>Ensure the reported versions are equal to or greater than <code>v18.15.0, 9.5.0</code> respectively.</p>
</li>
<li>
<p>Install a Bonjour (mDNS) service for Linux called Avahi, which allows Apps and other network devices to Discover the Signal K server.</p>
<pre><code>sudo apt install libnss-mdns avahi-utils libavahi-compat-libdnssd-dev
</code></pre>
</li>
</ol>
<h2 id="install-signal-k-server"><a class="header" href="#install-signal-k-server">Install Signal K Server</a></h2>
<pre><code>sudo npm install -g signalk-server
</code></pre>
<p>You can test that installation was successful by starting the server using some
sample data.</p>
<pre><code>signalk-server --sample-nmea0183-data
</code></pre>
<p>You should see the terminal output "signalk-server running at 0.0.0.0:3000" as shown below...</p>
<pre><code>signalk-server --sample-nmea0183-data
Using sample data from /usr/lib/node_modules/signalk-server/samples/plaka.log
signalk-server running at 0.0.0.0:3000
</code></pre>
<p>The Signal K Node Server is now reading and publishing sample NMEA0183 data from the specified file.</p>
<p>Using a Web browser enter the following URL: <code>http://127.0.0.1:3000/signalk</code> which should display the following information indicating the server is up and running.</p>
<pre><code class="language-JSON">{
"endpoints":{
"v1":{
"version":"2.0.0",
"signalk-http":"http://127.0.0.1:3000/signalk/v1/api/",
"signalk-ws":"ws://127.0.0.1:3000/signalk/v1/stream",
"signalk-tcp":"tcp://127.0.0.1:3858"
}
},
"server":{
"id":"signalk-server-node",
"version":"2.0.0"
}
}
</code></pre>
<h2 id="run-the-setup-script"><a class="header" href="#run-the-setup-script">Run the Setup Script</a></h2>
<p>Now that you have Signal K server installed, you will want to generate a settings file for your vessel
and configure your RPi to start the server automatically. To do this run the setup script by entering the following command and follow the prompts.</p>
<pre><code>sudo signalk-server-setup
</code></pre>
<p>You can re-run this command at any time in the future to change the settings.</p>
<p><em>Note: The setup script will enable security which will require you to <code>Login`` from the Admin UI. Clicking </code>Login` for the first time will prompt you to create a user and password.</em></p>
<p>Signal K server will now be started automatically when your RPi boots up.</p>
<p>If you want to temporarily stop the Signal K server, you can do so by entering the following commands:</p>
<pre><code>sudo systemctl stop signalk.service
sudo systemctl stop signalk.socket
</code></pre>
<p>To start Signal K server again enter the following commands:</p>
<pre><code>sudo systemctl start signalk.service
sudo systemctl start signalk.socket
</code></pre>
<p>To stop Signal K server from starting automatically enter the following commands:</p>
<pre><code>sudo systemctl disable signalk.service
sudo systemctl disable signalk.socket
</code></pre>
<p>You are ready to now <strong><a href="../setup/configuration.html">configure</a></strong> your installation and connect data from devices on your boat.</p>
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