doc: Add documentation about 'recorder' configuration

docs/ha_configuration.md

@@ -0,0 +1,29 @@
+# Home Assistant configuration
+
+**Power meter** is reading energy exchanged with the grid every secondes.  
+By default, Home Assistant *recorder* is saving this information in its database.  
+To optimize data storage in Home Assistant, it's essential to configure databases appropriately.
+
+* First **Identify the Target Sensor**  
+  Power meter provides a sensor names `real_power`.  
+  In your Home Assistant it should be prefixed with the name of your device and should then be identified with an id like `sensor.solarrouter_real_power`.  
+  Check you sensor to adapt the configuration.
+
+* Then **Create a `recorder` configuration for Home Assistant**  
+  Add the following lines in your `configuration.yaml` to filter out `real_power` data:  
+
+    ```yaml
+    recorder:
+      exclude:
+        entities:
+          - sensor.solarrouter_real_power
+    ```
+!!! note "About recorder"
+    Home Assistant `recorder` is constantly saves data in database. Refer to [recorder configuration](https://www.home-assistant.io/integrations/recorder/) for details.
+
+
+!!! warning "If you are uding InfluxDB"
+    If you are using InfluxDB, you should pay the same attention about data recording.  
+    Refer to the [integration documentation](https://www.home-assistant.io/integrations/influxdb/) to exclude `real_power` from your database.
+
+

mkdocs.yml

@@ -22,6 +22,7 @@ nav:
       - Triac: regulator_triac.md
       - Relay: regulator_relay.md
   - Engine: engine.md
+  - HA configuration: ha_configuration.md
   - Contributing: contributing.md
   - ChangeLog: changelog.md
   - License: license.md