diff --git a/esphome/sleepingroom.yaml b/esphome/sleepingroom.yaml
index 1c628b4..d4deae1 100644
--- a/esphome/sleepingroom.yaml
+++ b/esphome/sleepingroom.yaml
@@ -3,19 +3,15 @@ esphome:
   platform: ESP32
   board: nodemcu-32s
   
-#  # Dirty hack, because on_value_range does not trigger green if sensor
-#  # value is within green range on boot.
-#  on_boot:
+# Startup animation
+#on_boot:
+#  then:
+
+#script:
+#  - id: startup_animation
 #    then:
-#      - output.set_level:
-#          id: led_green
-#          level: 58%
-#      - output.set_level:
-#          id: led_red
-#          level: 0%
-#      - text_sensor.template.publish:
-#          id: co2_warn
-#          state: "grün"
+#      - delay: 5s
+#      - 
 
 wifi:
   ssid: "Voltage-legacy"
@@ -62,7 +58,7 @@ output:
     pin: GPIO19
     id: led_blue
 
-# Example configuration entry
+# Define RGB mode for LED
 light:
   - platform: rgb
     id: co2_light
@@ -70,6 +66,7 @@ light:
     red: led_red
     green: led_green
     blue: led_blue
+    internal: true
 
 # Initialize UART for Vindriktning sensor
 uart:
@@ -90,11 +87,12 @@ sensor:
   - platform: wifi_signal
     name: "WiFi Signalstärke"
     update_interval: 60s
-  # SCD30 CO2 +  Temperature + Humidity Sensor
-  # • Luftqualität Kategorie 1: die LEDs leuchten grün (bis 800 ppm) 
-  # • Luftqualität Kategorie 2: die LEDs leuchten gelb (900-1200 ppm) 
-  # • Luftqualität Kategorie 3: die LEDs leuchten orange (1200 bis 1600ppm) 
-  # • Luftqualität Kategorie 4: die LEDs leuchten rot (ab 1600ppm) 
+  # SCD30 CO2 +  temperature + humidity sensor
+  # * air quality category 0: LED is purple, sensor needs calibration (<400ppm)
+  # • air quality category 1: LED is green (400-800ppm) 
+  # • air quality category 2: LED is yellow (900-1200ppm) 
+  # • air quality category 3: LED is orange/amber (1200 bis 1600ppm) 
+  # • air quality category 4: LED is red (1600-2000ppm) 
   - platform: scd30
     i2c_id: bus_a
     co2:
@@ -102,29 +100,59 @@ sensor:
       id: co2_value
       accuracy_decimals: 1
       on_value_range:
-        - above: 380
+        - below: 400
+          then:
+            - text_sensor.template.publish:
+                id: co2_warn
+                state: "Kalibrierung nötig"
+            - light.turn_on:
+                id: co2_light
+                red: 75%
+                green: 0%
+                blue: 100%
+        - above: 400
           below: 800
           then:
             - text_sensor.template.publish:
                 id: co2_warn
                 state: "grün"
+            - light.turn_on:
+                id: co2_light
+                red: 0%
+                green: 100%
+                blue: 9%
         - above: 800
           below: 1200
           then:
             - text_sensor.template.publish:
                 id: co2_warn
                 state: "gelb"
+            - light.turn_on:
+                id: co2_light
+                red: 100%
+                green: 100%
+                blue: 0%
         - above: 1200
           below: 1600
           then:
             - text_sensor.template.publish:
                 id: co2_warn
                 state: "orange"
+            - light.turn_on:
+                id: co2_light
+                red: 100%
+                green: 75%
+                blue: 0%
         - above: 1600
           then:
             - text_sensor.template.publish:
                 id: co2_warn
                 state: "rot"
+            - light.turn_on:
+                id: co2_light
+                red: 100%
+                green: 0%
+                blue: 0%
     temperature:
       name: "Schlafzimmer Temperatur"
       accuracy_decimals: 2
@@ -214,8 +242,3 @@ switch:
       - remote_transmitter.transmit_samsung:
           data: 0xE0E040BF
           nbits: 32
-#script:
-#  - id: startup_animation
-#    then:
-#      - delay: 5s
-#      - 
\ No newline at end of file