Documentation for LCN component and light platform (#7599)

* Initial documentation for LCN component and light platform

* Light platform integrated into LCN component

* Incorporated LCN lights example and configuration docs into corresponding component.

source/_components/lcn.markdown

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+---
+layout: page
+title: "LCN"
+description: "Instructions on how to integrate LCN components with Home Assistant."
+date: 2018-11-01 08:00
+sidebar: true
+comments: false
+sharing: true
+footer: true
+logo: lcn.png
+ha_category: Hub
+ha_release: 0.85
+ha_iot_class: "Local Push"
+---
+
+
+The `lcn` integration for Home Assistant allows you to connect to [LCN](http://www.lcn.eu) hardware devices.
+
+The component requires one unused license of the coupling software LCN-PCHK (version >2.8) and a LCN hardware coupler. Alternatively a LCN-PKE coupler can be used which offers two PCHK licenses.
+With this setup sending and receiving commands to and from LCN modules is possible.
+
+
+There is currently support for the following device types within Home Assistant:
+
+- [Light](/components/light.lcn)
+
+## {% linkable_title Configuration %}
+
+To use your LCN system in your installation, add the following lines to your `configuration.yaml` file.
+You have to specify at least one ip/port with login credentials for a PCHK host.
+Consider to store your credentials in a [secrets.yaml](/docs/configuration/secrets).
+
+
+```yaml
+lcn:
+  connections:
+    - name: myhome
+      host: 192.168.2.41
+      port: 4114
+      username: lcn
+      password: lcn
+  
+  lights:
+    - name: Bedroom light
+      address: myhome.s0.m7
+      output: output1
+      dimmable: true
+      transition: 5
+```
+
+{% configuration %}
+connections:
+  description: List of your connections
+  required: true
+  type: map
+  keys:
+    host:
+      description: IP address of the LCN-PCHK host.
+      required: true
+      type: string
+    port:
+      description: Port of the LCN-PCHK host.
+      required: true
+      type: integer
+    username:
+      description: Login username for the LCN-PCHK host.
+      required: true
+      type: string
+    password:
+      description: Login password for the LCN-PCHK host.
+      required: true
+      type: string
+    name:
+      description: Optional connection identifier. If omited, the connections will be named consecutively as _pchk_, _pchk1_, _pchk2_, ...
+      required: false
+      default: pchk
+      type: string
+    sk_num_tries:
+      description: Segment coupler scans. Increase this number if you have at least one segment coupler in your system.
+      required: false
+      default: 0
+      type: integer
+    dim_mode:
+      description: "Dimming mode for connected modules. The operation mode is programmed into the LCN modules by the LCN-PRO software and depends on their firmware. If you experience unexpected dimming behavior, the connection is probably in the wrong operation mode. Possible values: _steps50_, _steps200_"
+      required: false
+      default: steps50
+      type: string
+
+lights:
+  description: List of your lights.
+  required: true
+  type: map
+  keys:
+    name:
+      description: Name of the light.
+      required: true
+      type: string
+    address:
+      description: "[Address](/components/lcn#lcn-addresses) of the module/group."
+      required: true
+      type: string
+    output:
+      description: "Light source ([OUTPUT_PORT](/components/lcn#ports))."
+      required: true
+      type: string
+    dimmable:
+      description: Enable the dimming feature for this light
+      required: false
+      type: bool
+      default: false
+    transition:
+      description: Transition (ramp) time in seconds.
+      required: false
+      type: int
+      default: 0
+{% endconfiguration %}
+
+
+
+## {% linkable_title LCN Addresses %}
+LCN hardware devices connected to the LCN bus are called _modules_. LCN modules are addressed by their numeric id in the range (5..254).
+
+Modules can be arranged in _segments_. Segments can be addressed by their numeric id (5..128) or 0 (= no segment exist) or 3 (= target all segments).
+
+LCN Modules within the _same_ segment can be grouped by their group id (5..254) or 3 (= target all groups.)
+
+The LCN component allow the connection to more than one hardware coupler. In this case it has to be specified which hardware coupler should be used for addressing the specified module.
+
+Whenever the address of a module or a group has to be specified, it can be addressed using one of the following syntaxes:
+
+Example for modules:
+```
+connid.s000.m007
+connid.s0.m7
+s0.m7
+0.7
+```
+
+Example for groups:
+```
+connid.s000.g007
+connid.s0.g7
+s0.g7
+0.g7
+```
+
+Leading zeroes in the segment id or module/group id can be omitted. If the `connection_id` is omitted, the first connection defined in the [configuration](#configuration) will be used.
+
+
+## {% linkable_title LCN Constants %}
+The platforms and service calls use several predefined constants as parameters.
+
+#### {% linkable_title Ports %}
+
+| Constant | Values |
+| -------- | ------ |
+| OUTPUT_PORT | `output1`, `output2`, `output3`, `output4` |

source/_components/light.lcn.markdown

@@ -0,0 +1,23 @@
+---
+layout: page
+title: "LCN Light"
+description: "Instructions on how to setup LCN lights within Home Assistant."
+date: 2018-11-01 08:00
+sidebar: true
+comments: false
+sharing: true
+footer: true
+logo: lcn.png
+ha_category: Light
+ha_release: 0.85
+ha_iot_class: "Local Push"
+---
+
+The `lcn` light platform allows the control of the following [LCN](http://www.lcn.eu) ports:
+
+- (Dimmable) output ports
+
+## {% linkable_title Configuration %}
+
+The `lcn` component must be configured correctly, see [LCN component](/components/lcn).
+This platform is configured within the `lcn` component.