fix gdk101 fw version reporting

content/components/sensor/gdk101.md

@@ -76,13 +76,10 @@ A sensor platform to radiation data
 
 Configuration variables:
 
-- **radiation_dose_per_1m** (**Required**): Radiation average dose per 1 minute.
+- **radiation_dose_per_1m** (*Optional*): Radiation average dose per 1 minute.
   All options from [Sensor](#config-sensor).
 
-- **radiation_dose_per_10m** (**Required**): Radiation average dose per 10 minutes.
-  All options from [Sensor](#config-sensor).
-
-- **version** (**Required**): Fimware version of the module.
+- **radiation_dose_per_10m** (*Optional*): Radiation average dose per 10 minutes.
   All options from [Sensor](#config-sensor).
 
 - **status** (*Optional*): Sensor status.
@@ -108,6 +105,54 @@ Configuration variables:
 - **vibrations** (**Required**): Vibration status.
   All options from [Binary Sensor](#config-binary_sensor).
 
+## Text Sensor
+
+```yaml
+# Example configuration entry
+text_sensor:
+  - platform: gdk101
+    version:
+      name: "GDK101 FW Version"
+```
+
+Text sensor that report firmware version of the sensor.
+
+Configuration variables:
+
+- **version** (*Optional*): Firmware version of the module.
+  All options from [Text Sensor](#config-text_sensor).
+
+## Sensor Status
+
+Sensor status indicates how long sensor work which indicates accuracy of the measurements
+
+| 0 | Power On ~ 10sec |
+| 1 | 10sec to 10min   |
+| 2 | After 10 min     |
+
+This can be represented by a template text sensor such as below:
+
+```yaml
+sensor:
+  - platform: gdk101
+    status:
+      name: "GDK101 status"
+      id: gdk101_status
+  - platform: template
+    name: "GDK101 Status Description"
+    lambda: |-
+      int status = int(id(gdk101_status).state);
+      if (status == 0) {
+        return {"Powered On"};
+      } else if (status == 1) {
+        return {"Settling"};
+      } else if (status == 2) {
+        return {"Settled"};
+      } else {
+        return {"Unknown status"};
+      }
+```
+
 ## See Also
 
 - [Sensor Filters](#sensor-filters)