Add documentation for LIVISI integration (#23808)

Co-authored-by: Martin Hjelmare <marhje52@gmail.com>
Co-authored-by: Franck Nijhof <frenck@frenck.nl>

source/_integrations/livisi.markdown

@@ -0,0 +1,39 @@
+---
+title: LIVISI SmartHome
+description: Access and control your LIVISI Smart Home Controller (SHC) and its connected RWE/innogy devices.
+ha_category:
+  - Switch
+ha_iot_class: Local Push
+ha_release: 2022.12.0
+ha_config_flow: true
+ha_codeowners:
+  - '@StefanIacobLivisi'
+ha_domain: livisi
+ha_platforms:
+  - switch
+ha_integration_type: integration
+
+---
+The LIVISI Smart Home integration allows you to connect your LIVISI Smart Home Controller (SHC) to Home Assistant. The SHC can control compatible devices from RWE/innogy connected to it.
+ 
+The following devices are currently supported by this integration:
+ 
+- RWE/innogy Smart Plug (PSS)
+ 
+##Prequisites
+ 
+This integration communicates with the local version of LIVISI SmartHome only. 
+ 
+To activate the local SmartHome functionality, please use the LIVISI App and go to **Settings** >> **General Settings** >> **Local SmartHome** and click **Activate**.
+ 
+Please visit [LIVISI Community](https://community.livisi.de) for more information.
+ 
+{% include integrations/config_flow.md %}
+ 
+### Extra Configuration
+ 
+The current integration will not find your SHC automatically and needs to be configured manually. You will need to provide the IP address and the local password for the controller.
+ 
+## Device Discovery
+
+All devices are automatically discovered and included by the integration. If you include a new device in LIVISI SmartHome, the device will automatically appear in Home Assistant after a few minutes.