diff --git a/.idea/workspace.xml b/.idea/workspace.xml
index a74a71a..2fc017a 100644
--- a/.idea/workspace.xml
+++ b/.idea/workspace.xml
@@ -2,7 +2,7 @@
 <project version="4">
   <component name="ChangeListManager">
     <list default="true" id="1a245e6a-2e43-4348-8759-dc1b63a4c9c8" name="Default" comment="">
-      <change type="MODIFICATION" beforePath="$PROJECT_DIR$/docs_src/copy_docs.sh" afterPath="$PROJECT_DIR$/docs_src/copy_docs.sh" />
+      <change type="MODIFICATION" beforePath="$PROJECT_DIR$/docs_src/source/index.rst" afterPath="$PROJECT_DIR$/docs_src/source/index.rst" />
     </list>
     <option name="EXCLUDED_CONVERTED_TO_IGNORED" value="true" />
     <option name="TRACKING_ENABLED" value="true" />
@@ -73,11 +73,11 @@
   </component>
   <component name="FileEditorManager">
     <leaf SIDE_TABS_SIZE_LIMIT_KEY="300">
-      <file leaf-file-name="index.rst" pinned="false" current-in-tab="false">
+      <file leaf-file-name="index.rst" pinned="false" current-in-tab="true">
         <entry file="file://$PROJECT_DIR$/docs_src/source/index.rst">
           <provider selected="true" editor-type-id="text-editor">
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-              <caret line="14" column="0" lean-forward="false" selection-start-line="14" selection-start-column="0" selection-end-line="14" selection-end-column="0" />
+            <state relative-caret-position="150">
+              <caret line="10" column="15" lean-forward="false" selection-start-line="10" selection-start-column="15" selection-end-line="10" selection-end-column="15" />
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             </state>
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@@ -99,53 +99,23 @@
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-                <marker date="1542401714975" expanded="false" signature="3405:3410" ph="&amp;" />
-                <marker date="1542401714975" expanded="true" signature="3535:3575" ph="..." />
+                <marker date="1542401827340" expanded="true" signature="2526:2703" ph="..." />
+                <marker date="1542401827340" expanded="true" signature="2555:2696" ph="..." />
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+                <marker date="1542401827340" expanded="false" signature="2732:2745" ph="..." />
+                <marker date="1542401827340" expanded="true" signature="2760:3110" ph="..." />
+                <marker date="1542401827340" expanded="true" signature="2820:3103" ph="..." />
+                <marker date="1542401827340" expanded="true" signature="2880:3092" ph="..." />
+                <marker date="1542401827340" expanded="true" signature="3281:3586" ph="..." />
+                <marker date="1542401827340" expanded="false" signature="3289:3295" ph="©" />
+                <marker date="1542401827340" expanded="false" signature="3405:3410" ph="&amp;" />
+                <marker date="1542401827340" expanded="true" signature="3535:3575" ph="..." />
               </folding>
             </state>
           </provider>
         </entry>
       </file>
-      <file leaf-file-name="Makefile" pinned="false" current-in-tab="false">
-        <entry file="file://$PROJECT_DIR$/docs_src/Makefile">
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-              <folding />
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-          </provider>
-        </entry>
-      </file>
-      <file leaf-file-name="conf.py" pinned="false" current-in-tab="false">
-        <entry file="file://$PROJECT_DIR$/docs_src/source/conf.py">
-          <provider selected="true" editor-type-id="text-editor">
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-              <folding />
-            </state>
-          </provider>
-        </entry>
-      </file>
-      <file leaf-file-name="requirements.txt" pinned="false" current-in-tab="false">
-        <entry file="file://$PROJECT_DIR$/requirements.txt">
-          <provider selected="true" editor-type-id="text-editor">
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-              <folding />
-            </state>
-          </provider>
-        </entry>
-      </file>
       <file leaf-file-name="main.py" pinned="false" current-in-tab="false">
         <entry file="file://$PROJECT_DIR$/main.py">
           <provider selected="true" editor-type-id="text-editor">
@@ -181,7 +151,7 @@
           </provider>
         </entry>
       </file>
-      <file leaf-file-name="copy_docs.sh" pinned="false" current-in-tab="true">
+      <file leaf-file-name="copy_docs.sh" pinned="false" current-in-tab="false">
         <entry file="file://$PROJECT_DIR$/docs_src/copy_docs.sh">
           <provider selected="true" editor-type-id="text-editor">
             <state relative-caret-position="75">
@@ -191,6 +161,36 @@
           </provider>
         </entry>
       </file>
+      <file leaf-file-name="actor.rst" pinned="false" current-in-tab="false">
+        <entry file="file://$PROJECT_DIR$/docs_src/source/actor.rst">
+          <provider selected="true" editor-type-id="text-editor">
+            <state relative-caret-position="270">
+              <caret line="18" column="0" lean-forward="false" selection-start-line="18" selection-start-column="0" selection-end-line="18" selection-end-column="0" />
+              <folding />
+            </state>
+          </provider>
+        </entry>
+      </file>
+      <file leaf-file-name="step.rst" pinned="false" current-in-tab="false">
+        <entry file="file://$PROJECT_DIR$/docs_src/source/step.rst">
+          <provider selected="true" editor-type-id="text-editor">
+            <state relative-caret-position="0">
+              <caret line="0" column="0" lean-forward="false" selection-start-line="0" selection-start-column="0" selection-end-line="0" selection-end-column="0" />
+              <folding />
+            </state>
+          </provider>
+        </entry>
+      </file>
+      <file leaf-file-name="core.rst" pinned="false" current-in-tab="false">
+        <entry file="file://$PROJECT_DIR$/docs_src/source/core.rst">
+          <provider selected="true" editor-type-id="text-editor">
+            <state relative-caret-position="0">
+              <caret line="0" column="4" lean-forward="false" selection-start-line="0" selection-start-column="4" selection-end-line="0" selection-end-column="4" />
+              <folding />
+            </state>
+          </provider>
+        </entry>
+      </file>
     </leaf>
   </component>
   <component name="FileTemplateManagerImpl">
@@ -296,9 +296,10 @@
         <option value="$PROJECT_DIR$/docs_src/source/actor.rst" />
         <option value="$PROJECT_DIR$/core/extension/dummy/__init__.py" />
         <option value="$PROJECT_DIR$/.gitignore" />
-        <option value="$PROJECT_DIR$/docs_src/source/index.rst" />
         <option value="$PROJECT_DIR$/README.md" />
         <option value="$PROJECT_DIR$/docs_src/copy_docs.sh" />
+        <option value="$PROJECT_DIR$/docs_src/source/core.rst" />
+        <option value="$PROJECT_DIR$/docs_src/source/index.rst" />
       </list>
     </option>
   </component>
@@ -454,6 +455,7 @@
       <recent name="$PROJECT_DIR$/core/controller" />
     </key>
     <key name="CopyFile.RECENT_KEYS">
+      <recent name="$PROJECT_DIR$/docs_src/source" />
       <recent name="$PROJECT_DIR$/docs/build/html" />
       <recent name="$PROJECT_DIR$/docs" />
       <recent name="$PROJECT_DIR$/core/extension/comp" />
@@ -845,21 +847,6 @@
     <watches-manager />
   </component>
   <component name="editorHistoryManager">
-    <entry file="file://$PROJECT_DIR$/core/controller/__init__.py">
-      <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="0">
-          <caret line="0" column="0" lean-forward="false" selection-start-line="0" selection-start-column="0" selection-end-line="0" selection-end-column="0" />
-        </state>
-      </provider>
-    </entry>
-    <entry file="file://$PROJECT_DIR$/core/controller/crud_controller.py">
-      <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="-629">
-          <caret line="0" column="6" lean-forward="false" selection-start-line="0" selection-start-column="6" selection-end-line="0" selection-end-column="6" />
-          <folding />
-        </state>
-      </provider>
-    </entry>
     <entry file="file://$PROJECT_DIR$/core/websocket.py">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="131">
@@ -1149,14 +1136,6 @@
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/docs_src/source/actor.rst">
-      <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="227">
-          <caret line="18" column="0" lean-forward="false" selection-start-line="18" selection-start-column="0" selection-end-line="18" selection-end-column="0" />
-          <folding />
-        </state>
-      </provider>
-    </entry>
     <entry file="file://$PROJECT_DIR$/core/extension/dummy/__init__.py">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="302">
@@ -1230,30 +1209,22 @@
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           <caret line="0" column="0" lean-forward="false" selection-start-line="0" selection-start-column="0" selection-end-line="0" selection-end-column="0" />
           <folding>
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-            <marker date="1542401714975" expanded="true" signature="2555:2696" ph="..." />
-            <marker date="1542401714975" expanded="true" signature="2562:2690" ph="..." />
-            <marker date="1542401714975" expanded="true" signature="2604:2685" ph="..." />
-            <marker date="1542401714975" expanded="false" signature="2732:2745" ph="..." />
-            <marker date="1542401714975" expanded="true" signature="2760:3110" ph="..." />
-            <marker date="1542401714975" expanded="true" signature="2820:3103" ph="..." />
-            <marker date="1542401714975" expanded="true" signature="2880:3092" ph="..." />
-            <marker date="1542401714975" expanded="true" signature="3281:3586" ph="..." />
-            <marker date="1542401714975" expanded="false" signature="3289:3295" ph="©" />
-            <marker date="1542401714975" expanded="false" signature="3405:3410" ph="&amp;" />
-            <marker date="1542401714975" expanded="true" signature="3535:3575" ph="..." />
+            <marker date="1542401827340" expanded="true" signature="2526:2703" ph="..." />
+            <marker date="1542401827340" expanded="true" signature="2555:2696" ph="..." />
+            <marker date="1542401827340" expanded="true" signature="2562:2690" ph="..." />
+            <marker date="1542401827340" expanded="true" signature="2604:2685" ph="..." />
+            <marker date="1542401827340" expanded="false" signature="2732:2745" ph="..." />
+            <marker date="1542401827340" expanded="true" signature="2760:3110" ph="..." />
+            <marker date="1542401827340" expanded="true" signature="2820:3103" ph="..." />
+            <marker date="1542401827340" expanded="true" signature="2880:3092" ph="..." />
+            <marker date="1542401827340" expanded="true" signature="3281:3586" ph="..." />
+            <marker date="1542401827340" expanded="false" signature="3289:3295" ph="©" />
+            <marker date="1542401827340" expanded="false" signature="3405:3410" ph="&amp;" />
+            <marker date="1542401827340" expanded="true" signature="3535:3575" ph="..." />
           </folding>
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/docs_src/source/index.rst">
-      <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="210">
-          <caret line="14" column="0" lean-forward="false" selection-start-line="14" selection-start-column="0" selection-end-line="14" selection-end-column="0" />
-          <folding />
-        </state>
-      </provider>
-    </entry>
     <entry file="file://$PROJECT_DIR$/docs_src/source/sensor.rst">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="210">
@@ -1281,5 +1252,37 @@
         </state>
       </provider>
     </entry>
+    <entry file="file://$PROJECT_DIR$/docs_src/source/actor.rst">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="270">
+          <caret line="18" column="0" lean-forward="false" selection-start-line="18" selection-start-column="0" selection-end-line="18" selection-end-column="0" />
+          <folding />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/docs_src/source/step.rst">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="0">
+          <caret line="0" column="0" lean-forward="false" selection-start-line="0" selection-start-column="0" selection-end-line="0" selection-end-column="0" />
+          <folding />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/docs_src/source/core.rst">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="0">
+          <caret line="0" column="4" lean-forward="false" selection-start-line="0" selection-start-column="4" selection-end-line="0" selection-end-column="4" />
+          <folding />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/docs_src/source/index.rst">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="150">
+          <caret line="10" column="15" lean-forward="false" selection-start-line="10" selection-start-column="15" selection-end-line="10" selection-end-column="15" />
+          <folding />
+        </state>
+      </provider>
+    </entry>
   </component>
 </project>
\ No newline at end of file
diff --git a/docs/_sources/core.rst.txt b/docs/_sources/core.rst.txt
new file mode 100644
index 0000000..6d6ab6c
--- /dev/null
+++ b/docs/_sources/core.rst.txt
@@ -0,0 +1,2 @@
+Core
+========
\ No newline at end of file
diff --git a/docs/_sources/index.rst.txt b/docs/_sources/index.rst.txt
index 9bd9446..65c60f3 100644
--- a/docs/_sources/index.rst.txt
+++ b/docs/_sources/index.rst.txt
@@ -8,8 +8,9 @@ Welcome to CraftBeerPi's documentation!
 
 
 .. toctree::
-   :maxdepth: 1
+   :maxdepth: 3
 
+   core
    actor
    sensor
 
diff --git a/docs/core.html b/docs/core.html
new file mode 100644
index 0000000..7d8e641
--- /dev/null
+++ b/docs/core.html
@@ -0,0 +1,113 @@
+
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
+  "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+
+<html xmlns="http://www.w3.org/1999/xhtml">
+  <head>
+    <meta http-equiv="X-UA-Compatible" content="IE=Edge" />
+    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
+    <title>Core &#8212; CraftBeerPi 4.0 documentation</title>
+    <link rel="stylesheet" href="_static/alabaster.css" type="text/css" />
+    <link rel="stylesheet" href="_static/pygments.css" type="text/css" />
+    <script type="text/javascript" id="documentation_options" data-url_root="./" src="_static/documentation_options.js"></script>
+    <script type="text/javascript" src="_static/jquery.js"></script>
+    <script type="text/javascript" src="_static/underscore.js"></script>
+    <script type="text/javascript" src="_static/doctools.js"></script>
+    <script async="async" type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.1/MathJax.js?config=TeX-AMS-MML_HTMLorMML"></script>
+    <link rel="index" title="Index" href="genindex.html" />
+    <link rel="search" title="Search" href="search.html" />
+    <link rel="next" title="Actor" href="actor.html" />
+    <link rel="prev" title="Welcome to CraftBeerPi’s documentation!" href="index.html" />
+   
+  <link rel="stylesheet" href="_static/custom.css" type="text/css" />
+  
+  
+  <meta name="viewport" content="width=device-width, initial-scale=0.9, maximum-scale=0.9" />
+
+  </head><body>
+  
+
+    <div class="document">
+      <div class="documentwrapper">
+        <div class="bodywrapper">
+          
+
+          <div class="body" role="main">
+            
+  <div class="section" id="core">
+<h1>Core<a class="headerlink" href="#core" title="Permalink to this headline">¶</a></h1>
+</div>
+
+
+          </div>
+          
+        </div>
+      </div>
+      <div class="sphinxsidebar" role="navigation" aria-label="main navigation">
+        <div class="sphinxsidebarwrapper">
+<h1 class="logo"><a href="index.html">CraftBeerPi</a></h1>
+
+
+
+
+
+
+
+
+<h3>Navigation</h3>
+<ul class="current">
+<li class="toctree-l1 current"><a class="current reference internal" href="#">Core</a></li>
+<li class="toctree-l1"><a class="reference internal" href="actor.html">Actor</a></li>
+<li class="toctree-l1"><a class="reference internal" href="sensor.html">Sensor</a></li>
+</ul>
+
+<div class="relations">
+<h3>Related Topics</h3>
+<ul>
+  <li><a href="index.html">Documentation overview</a><ul>
+      <li>Previous: <a href="index.html" title="previous chapter">Welcome to CraftBeerPi’s documentation!</a></li>
+      <li>Next: <a href="actor.html" title="next chapter">Actor</a></li>
+  </ul></li>
+</ul>
+</div>
+<div id="searchbox" style="display: none" role="search">
+  <h3>Quick search</h3>
+    <div class="searchformwrapper">
+    <form class="search" action="search.html" method="get">
+      <input type="text" name="q" />
+      <input type="submit" value="Go" />
+      <input type="hidden" name="check_keywords" value="yes" />
+      <input type="hidden" name="area" value="default" />
+    </form>
+    </div>
+</div>
+<script type="text/javascript">$('#searchbox').show(0);</script>
+
+
+
+
+
+
+
+
+        </div>
+      </div>
+      <div class="clearer"></div>
+    </div>
+    <div class="footer">
+      &copy;2018, Manuel Fritsch.
+      
+      |
+      Powered by <a href="http://sphinx-doc.org/">Sphinx 1.8.1</a>
+      &amp; <a href="https://github.com/bitprophet/alabaster">Alabaster 0.7.12</a>
+      
+      |
+      <a href="_sources/core.rst.txt"
+          rel="nofollow">Page source</a>
+    </div>
+
+    
+
+    
+  </body>
+</html>
\ No newline at end of file
diff --git a/docs/genindex.html b/docs/genindex.html
index c9ac67e..5d50885 100644
--- a/docs/genindex.html
+++ b/docs/genindex.html
@@ -107,6 +107,7 @@
 
 <h3>Navigation</h3>
 <ul>
+<li class="toctree-l1"><a class="reference internal" href="core.html">Core</a></li>
 <li class="toctree-l1"><a class="reference internal" href="actor.html">Actor</a></li>
 <li class="toctree-l1"><a class="reference internal" href="sensor.html">Sensor</a></li>
 </ul>
diff --git a/docs/index.html b/docs/index.html
index ba4d590..ec2aa98 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -16,7 +16,7 @@
     <script async="async" type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.1/MathJax.js?config=TeX-AMS-MML_HTMLorMML"></script>
     <link rel="index" title="Index" href="genindex.html" />
     <link rel="search" title="Search" href="search.html" />
-    <link rel="next" title="Actor" href="actor.html" />
+    <link rel="next" title="Core" href="core.html" />
    
   <link rel="stylesheet" href="_static/custom.css" type="text/css" />
   
@@ -37,8 +37,19 @@
 <h1>Welcome to CraftBeerPi’s documentation!<a class="headerlink" href="#welcome-to-craftbeerpi-s-documentation" title="Permalink to this headline">¶</a></h1>
 <div class="toctree-wrapper compound">
 <ul>
-<li class="toctree-l1"><a class="reference internal" href="actor.html">Actor</a></li>
-<li class="toctree-l1"><a class="reference internal" href="sensor.html">Sensor</a></li>
+<li class="toctree-l1"><a class="reference internal" href="core.html">Core</a></li>
+<li class="toctree-l1"><a class="reference internal" href="actor.html">Actor</a><ul>
+<li class="toctree-l2"><a class="reference internal" href="actor.html#architecture">Architecture</a></li>
+<li class="toctree-l2"><a class="reference internal" href="actor.html#module-core.controller.actor_controller">ActorController</a></li>
+<li class="toctree-l2"><a class="reference internal" href="actor.html#custom-actor">Custom Actor</a></li>
+</ul>
+</li>
+<li class="toctree-l1"><a class="reference internal" href="sensor.html">Sensor</a><ul>
+<li class="toctree-l2"><a class="reference internal" href="sensor.html#architecture">Architecture</a></li>
+<li class="toctree-l2"><a class="reference internal" href="sensor.html#module-core.controller.sensor_controller">SensorController</a></li>
+<li class="toctree-l2"><a class="reference internal" href="sensor.html#custom-sensor">Custom Sensor</a></li>
+</ul>
+</li>
 </ul>
 </div>
 </div>
@@ -61,6 +72,7 @@
 
 <h3>Navigation</h3>
 <ul>
+<li class="toctree-l1"><a class="reference internal" href="core.html">Core</a></li>
 <li class="toctree-l1"><a class="reference internal" href="actor.html">Actor</a></li>
 <li class="toctree-l1"><a class="reference internal" href="sensor.html">Sensor</a></li>
 </ul>
@@ -69,7 +81,7 @@
 <h3>Related Topics</h3>
 <ul>
   <li><a href="#">Documentation overview</a><ul>
-      <li>Next: <a href="actor.html" title="next chapter">Actor</a></li>
+      <li>Next: <a href="core.html" title="next chapter">Core</a></li>
   </ul></li>
 </ul>
 </div>
diff --git a/docs/objects.inv b/docs/objects.inv
index ba3e795..ca1270b 100644
Binary files a/docs/objects.inv and b/docs/objects.inv differ
diff --git a/docs/py-modindex.html b/docs/py-modindex.html
index 94f072f..33cb827 100644
--- a/docs/py-modindex.html
+++ b/docs/py-modindex.html
@@ -82,6 +82,7 @@
 
 <h3>Navigation</h3>
 <ul>
+<li class="toctree-l1"><a class="reference internal" href="core.html">Core</a></li>
 <li class="toctree-l1"><a class="reference internal" href="actor.html">Actor</a></li>
 <li class="toctree-l1"><a class="reference internal" href="sensor.html">Sensor</a></li>
 </ul>
diff --git a/docs/search.html b/docs/search.html
index 3eecc2f..9ea835e 100644
--- a/docs/search.html
+++ b/docs/search.html
@@ -82,6 +82,7 @@
 
 <h3>Navigation</h3>
 <ul>
+<li class="toctree-l1"><a class="reference internal" href="core.html">Core</a></li>
 <li class="toctree-l1"><a class="reference internal" href="actor.html">Actor</a></li>
 <li class="toctree-l1"><a class="reference internal" href="sensor.html">Sensor</a></li>
 </ul>
diff --git a/docs/searchindex.js b/docs/searchindex.js
index adedbb8..a58cfbb 100644
--- a/docs/searchindex.js
+++ b/docs/searchindex.js
@@ -1 +1 @@
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\ No newline at end of file
diff --git a/docs_src/source/core.rst b/docs_src/source/core.rst
new file mode 100644
index 0000000..6d6ab6c
--- /dev/null
+++ b/docs_src/source/core.rst
@@ -0,0 +1,2 @@
+Core
+========
\ No newline at end of file
diff --git a/docs_src/source/index.rst b/docs_src/source/index.rst
index 9bd9446..65c60f3 100644
--- a/docs_src/source/index.rst
+++ b/docs_src/source/index.rst
@@ -8,8 +8,9 @@ Welcome to CraftBeerPi's documentation!
 
 
 .. toctree::
-   :maxdepth: 1
+   :maxdepth: 3
 
+   core
    actor
    sensor