diff --git a/.devcontainer/devcontainer.json b/.devcontainer/devcontainer.json
index fab8c1f..729d669 100644
--- a/.devcontainer/devcontainer.json
+++ b/.devcontainer/devcontainer.json
@@ -1,7 +1,7 @@
 // See https://aka.ms/vscode-remote/devcontainer.json for format details.
 {
 	"image": "ludeeus/container:integration-debian",
-	"name": "Blueprint integration development",
+	"name": "HA KNMI development",
 	"context": "..",
 	"appPort": [
 		"9123:8123"
@@ -16,7 +16,7 @@
 	"settings": {
 		"files.eol": "\n",
 		"editor.tabSize": 4,
-		"terminal.integrated.shell.linux": "/bin/bash",
+		"terminal.integrated.defaultProfile.linux": "bash",
 		"python.pythonPath": "/usr/bin/python3",
 		"python.analysis.autoSearchPaths": false,
 		"python.linting.pylintEnabled": true,
diff --git a/.vscode/settings.json b/.vscode/settings.json
index a3d535d..aea87d4 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -4,5 +4,10 @@
     "python.pythonPath": "/usr/local/bin/python",
     "files.associations": {
         "*.yaml": "home-assistant"
-    }
+    },
+    "python.testing.pytestArgs": [
+        "tests"
+    ],
+    "python.testing.unittestEnabled": false,
+    "python.testing.pytestEnabled": true
 }
\ No newline at end of file
diff --git a/LICENSE b/LICENSE
index 1e7d3c0..705730d 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2021 golles
+Copyright (c) 2022 golles
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/custom_components/knmi/const.py b/custom_components/knmi/const.py
index 97372e6..be1c4fa 100644
--- a/custom_components/knmi/const.py
+++ b/custom_components/knmi/const.py
@@ -7,6 +7,10 @@
 from homeassistant.components.binary_sensor import (
     DEVICE_CLASS_SAFETY,
 )
+from homeassistant.components.sensor import (
+    STATE_CLASS_MEASUREMENT,
+    ATTR_STATE_CLASS,
+)
 from homeassistant.components.weather import (
     ATTR_CONDITION_CLEAR_NIGHT,
     ATTR_CONDITION_CLOUDY,
@@ -20,9 +24,6 @@
     ATTR_CONDITION_SUNNY,
 )
 
-# Todo, import next: from homeassistant.components.sensor import SensorStateClass
-MEASUREMENT = "measurement"
-
 # Base component constants.
 NAME = "KNMI"
 DOMAIN = "knmi"
@@ -72,8 +73,8 @@
         "device_class": DEVICE_CLASS_TEMPERATURE,
         "attributes": [
             {
-                "name": "state_class",
-                "value": MEASUREMENT,
+                "name": ATTR_STATE_CLASS,
+                "value": STATE_CLASS_MEASUREMENT,
             },
         ],
     },
@@ -85,8 +86,8 @@
         "device_class": DEVICE_CLASS_TEMPERATURE,
         "attributes": [
             {
-                "name": "state_class",
-                "value": MEASUREMENT,
+                "name": ATTR_STATE_CLASS,
+                "value": STATE_CLASS_MEASUREMENT,
             },
         ],
     },
diff --git a/custom_components/knmi/weather.py b/custom_components/knmi/weather.py
index b6ecda1..ba7a49e 100644
--- a/custom_components/knmi/weather.py
+++ b/custom_components/knmi/weather.py
@@ -129,6 +129,11 @@ def forecast(self):
                 if super().getData(f"d{i}windkmh") is not None
                 else None
             )
+            sun_chance = (
+                float(super().getData(f"d{i}zon"))
+                if super().getData(f"d{i}zon") is not None
+                else None
+            )
             next_day = {
                 ATTR_FORECAST_TIME: date.isoformat(),
                 ATTR_FORECAST_CONDITION: condition,
@@ -137,6 +142,7 @@ def forecast(self):
                 ATTR_FORECAST_PRECIPITATION: precipitation,
                 ATTR_FORECAST_WIND_BEARING: wind_bearing,
                 ATTR_FORECAST_WIND_SPEED: wind_speed,
+                "sun_chance": sun_chance,
             }
             forecast.append(next_day)