Initial STIEBEL ELTRON documentation (#8763)

* Initial stiebel eltron docu

* Put YOUR_IP instead of an IP

* Add default value for optional parameter

* Prepare for sensor platform integration

* Reflect the state mappings

* Update ha_release to 0.92

* Remove redirect

* ✏️ Tweak

* ✏️ Tweak

* ✏️ Tweak

source/_components/stiebel_eltron.markdown

@@ -0,0 +1,83 @@
+---
+layout: page
+title: "STIEBEL ELTRON"
+description: "Instructions on how to integrate STIEBEL ELTRON integral ventilation and heat pump units into Home Assistant."
+date: 2019-04-14 21:00 +0200
+sidebar: true
+comments: false
+sharing: true
+footer: true
+logo: stiebel_eltron.png
+ha_category:
+  - Climate
+ha_release: 0.92
+ha_iot_class: Local Polling
+---
+
+The `stiebel_eltron` component lets you control integral ventilation or heat pump units of [STIEBEL ELTRON](https://www.stiebel-eltron.com).
+
+It requires the following components:
+
+- Compatible STIEBEL ELTRON unit (see "Compatibility overview" in [Software Documentation Modbus TCP/IP](https://www.stiebel-eltron.ch/content/dam/ste/ch/de/downloads/kundenservice/smart-home/Modbus/Modbus%20Bedienungsanleitung.pdf))
+- [ISG web](https://www.stiebel-eltron.com/en/home/products-solutions/renewables/controller_energymanagement/internet_servicegateway/isg_web.html), with the [Modbus module](https://www.stiebel-eltron.ch/de/home/service/smart-home/modbus.html) enabled
+- IP network connection to the ISG web
+
+## {% linkable_title Supported units %}
+
+By now, the following units are tested:
+
+- LWZ504e
+- LWZ304
+
+## {% linkable_title Operation modes %}
+
+Only the standard HA operation modes are supported. The STIEBEL ELTRON modes are mapped and configurable as follows:
+
+- Auto (STATE_AUTO): Automatic mode
+- Eco (STATE_ECO): Standby mode
+- Manual (STATE_MANUAL): Manual mode
+- Off (STATE_OFF): DHW mode (domestic hot water mode, heating is switched off)
+
+The HA operation mode 'On' is displayed, if the following STIEBEL ELTRON modes are configured directly on the unit:
+
+- On (STATE_ON): Day mode, Setback mode or Emergency operation
+
+## {% linkable_title Configuration %}
+
+To enable this component, add the following lines to your `configuration.yaml` file:
+
+```yaml
+# Example configuration.yaml entry
+stiebel_eltron:
+  name: LWZ504e
+```
+
+{% configuration %}
+name:
+  description: Displayed name of the unit.
+  required: false
+  default: Unnamed Device
+  type: string
+hub:
+  description: The name of the hub where this slave is located.
+  required: false
+  default: default
+  type: string
+{% endconfiguration %}
+
+<p class='note'>
+This component requires the [Modbus](/components/modbus/) component to be set up to work
+</p>
+
+Full configuration example including modbus setup shown below:
+
+```yaml
+# Full example configuration.yaml entry
+modbus:
+  type: tcp
+  host: YOUR_ISGWEB_IP
+  port: 502
+
+stiebel_eltron:
+  name: LWZ504e
+```