Update sensor.rfxtrx.markdown

source/_components/sensor.rfxtrx.markdown

@@ -16,6 +16,25 @@ To enable RFXtrx sensors in your installation, add the following to your `config
 
 ```yaml
 # Example configuration.yaml entry
-sensor:
-  platform: rfxtrx
+sensor: 
+ platform: rfxtrx
+ automatic_add: True
+ devices:
+   sensor_0502:
+     name: Lving
+     packetid: 0a52080705020095220269
+     data_type: Temperature
+   sensor_0601:
+     name: Bath_Humidity
+     packetid: 0a520802060100ff0e0269
+     data_type: Humidity
+   sensor_0601 2:
+     name: Bath
+     packetid: 0a520802060100ff0e0269
 ```
+
+Configuration variables:
+
+- **devices**  (*Optional*): A list of devices with their name to use in the frontend.
+- **automatic_add** (*Optional*): To enable the automatic addition of new lights.
+- **data_type**  (*Optional*): Which data type the sensor should show