0.0.14

Corrected wind chill

README.md

@@ -59,6 +59,8 @@ Further, the adapter provides a selection of useful minimum and maximum values o
 The protocol sends a lightning distance of 0 when no lightning was detected. Values of 0 are modified to 999 to avoid the impression that lightning strikes are directly overhead.
 
 ## Changelog
+### 0.0.14
+(womi) Corrected wind chill calculation in feels like temperature calculation
 ### 0.0.13
 (womi) Corrected precipitation duration (again); changed boolean raining behaviour
 ### 0.0.12

io-package.json

@@ -1,8 +1,12 @@
 {
   "common": {
     "name": "weatherflow_udp",
-    "version": "0.0.13",
+    "version": "0.0.14",
     "news": {
+      "0.0.14": {
+        "en": "corrected calculation of windchill in feels like temperature",
+        "de": "Wind chill Temperatur korrigiert"
+      },
       "0.0.13": {
         "en": "Corrected precipitation duration; changed boolean raining behaviour",
         "de": "Korrektur: Regendauer; Regenstart erkennung geändert"

main.js

@@ -1032,14 +1032,14 @@ function beaufort(windspeed) {
 }
 
 /**
- * Canvert wind speed from m/s to beauforts
+ * Convert wind speed from m/s to beauforts
  * @param {number} temperature The local air temperature in °C
  * @param {number} windspeed The current wind speed in m/s
  * @param {number} humidity The local air humidity in %
  * @returns {number} Feels like temperature in °C
  */
 function feelsLike(temperature, windspeed, humidity) {
-  let feelsLikeTemperature = temperature;
+  let feelsLikeTemperature;
   if (temperature >= 26.7 && humidity >= 40) { // heat index (https://de.wikipedia.org/wiki/Hitzeindex)
     feelsLikeTemperature = (-8.784695 + 1.61139411 * temperature + 2.338549 * humidity);
     feelsLikeTemperature += (-0.14611605 * temperature * humidity);
@@ -1048,10 +1048,12 @@ function feelsLike(temperature, windspeed, humidity) {
     feelsLikeTemperature += (0.002211732 * (temperature ** 2) * humidity);
     feelsLikeTemperature += (0.00072546 * temperature * (humidity ** 2));
     feelsLikeTemperature += (-0.000003582 * (temperature ** 2) * (humidity ** 2));
-  } else if (temperature < 10 && windspeed > 1.4) { // wind chill (https://de.wikipedia.org/wiki/Windchill)
-    feelsLikeTemperature = 13.12 + 0.6215 * temperature + (((0.3965 * temperature - 11.37) * windspeed * 3.6) ** 0.16);
-    feelsLikeTemperature = Math.round(temperature * 10) / 10;
+  } else if (temperature < 10 && windspeed > (5 / 3.6)) { // wind chill (https://de.wikipedia.org/wiki/Windchill)
+    feelsLikeTemperature = 13.12 + 0.6215 * temperature + ((0.3965 * temperature) - 11.37) * ((windspeed * 3.6) ** 0.16);
+  } else {
+    feelsLikeTemperature = temperature;
   }
+  feelsLikeTemperature = Math.round(feelsLikeTemperature * 10) / 10;  // round to 1 decimal only
 
   return feelsLikeTemperature;
 }

package.json

@@ -57,5 +57,5 @@
     "test:package": "mocha test/package --exit",
     "test:unit": "mocha test/unit --exit"
   },
-  "version": "0.0.13"
+  "version": "0.0.14"
 }