diff --git a/README.md b/README.md
index ac733f3..6c34e57 100644
--- a/README.md
+++ b/README.md
@@ -9,9 +9,9 @@ Install the plugin through the SignalK plugin interface. After installation you
 'environment.forecast.humidity'<br><br>
 'environment.forecast.pressure'<br><br></code><br>
 </p>
-<p>Forecast data is purely based on position - hence <code>'navigation.position'</code> needs to present. Data will be queried on position change and/or regularily on an hourly-basis (triggered by signalk-raspberry-pi-temperature-plugin). <code>'navigation.gnss.antennaAltitude'</code> (GPS altitude) is required if operated on non-sealevel altitude to compensate atmospheric pressure data to the appropriate elevation. Plugins like signalk-fixedstation could be used and the plugin will make calculations by adjusting the pressure accordingly. Default is altitude = 0 (sea level).It will take the plugin a few minutes before showing output data, as it will need to collect position information before requesting data from openweathermap.</p><br> 
-By default the will update forecast information every hour. No information will be stored or tracked.<br>
-Note: Alerts from openweathermap.org currently not implemented as based on <code>'environment.outside.pressure'</code> like provided by RuuviTag severities could be more accurate and it's possible to set an alarm, i.e. via the Simple Notification-plugin.<br>
+<p>Forecast data is purely based on position - hence <code>'navigation.position'</code> needs to be present. Data will be queried on position change and/or regularily on an hourly-basis (triggered by signalk-raspberry-pi-temperature-plugin). <code>'navigation.gnss.antennaAltitude'</code> (GPS altitude) is required if operated on non-sealevel altitude to compensate atmospheric pressure data to the appropriate elevation. Plugins like signalk-fixedstation could be used and the plugin will make calculations by adjusting the pressure accordingly. Default is altitude = 0 (sea level).It will take the plugin a few minutes before showing output data, as it will need to collect position information before requesting data from openweathermap.</p><br> 
+By default the plugin will update forecast information every hour. No information will be stored or tracked.<br>
+Note: Alerts from openweathermap.org currently not implemented as based on <code>'environment.outside.pressure'</code> like provided by RuuviTag. Severities could be more accurate and it's possible to set an alarm, i.e. via the Simple Notification-plugin.<br>
 
 ## Details on input data
 <p>Simple output format is based on openweather-apis SMART JSON<br>
@@ -57,4 +57,6 @@ Note: Alerts from openweathermap.org currently not implemented as based on <code
   </code></p>
   
 The plugin shall adhere to meta-data units according to the SignalK definition.
-Note (v0.5): To comply with the SignalK spec timestamps are provided according to RFC3339.
\ No newline at end of file
+### Release Notes
+- v0.5: Comply with the SignalK spec by providing timestamps according to RFC3339.
+- v0.6: Support value timeouts according to the SignalK spec
\ No newline at end of file
diff --git a/openweather.js b/openweather.js
index cc2d1f8..3d23c8c 100644
--- a/openweather.js
+++ b/openweather.js
@@ -235,42 +235,42 @@ function onElevationUpdate(value) {
 }
 
 function prepareUpdate(forecast, weather, full) {
-    const noData = "waiting ..."
-    const noVal = null
+    const noData = "waiting ..."    // only sending for "description"
+    const noVal = null              // sending null until data is available
     switch (type) {
         case 'simple': return [
-            buildDeltaUpdate(forecastTime, forecast.time !== null ? convert.toSignalK('unixdate', forecast.time).value : noData),
+            buildDeltaUpdate(forecastTime, forecast.time !== null ? convert.toSignalK('unixdate', forecast.time).value : noVal),
 
             buildDeltaUpdate(simpleDescription, weather.description !== null ? weather.description : noData),
-            buildDeltaUpdate(simpleTemp, weather.temp !== null ? weather.temp : noVal),
+            buildDeltaUpdate(simpleTemp, weather.temp),
             buildDeltaUpdate(simpleHumidity, weather.humidity !== null ? convert.toSignalK('%', weather.humidity).value : noVal),
-            buildDeltaUpdate(simplePressure, weather.pressure !== null ? weather.pressure : noVal),
+            buildDeltaUpdate(simplePressure, weather.pressure),
             buildDeltaUpdate(simpleRain, weather.rain !== null ? weather.rain : {}),
-            buildDeltaUpdate(simpleWeatherCode, weather.weathercode !== null ? weather.weathercode : noVal)
+            buildDeltaUpdate(simpleWeatherCode, weather.weathercode)
         ];
         case 'full': return [
-            buildDeltaUpdate(forecastTime, forecast.time !== null ? convert.toSignalK('unixdate', forecast.time).value : noData),
-            buildDeltaUpdate(forecastSunrise, forecast.sunrise !== null ? convert.toSignalK('unixdate', forecast.sunrise).value : noData),
-            buildDeltaUpdate(forecastSunset, forecast.sunset !== null ? convert.toSignalK('unixdate', forecast.sunset).value : noData),
+            buildDeltaUpdate(forecastTime, forecast.time !== null ? convert.toSignalK('unixdate', forecast.time).value : noVal),
+            buildDeltaUpdate(forecastSunrise, forecast.sunrise !== null ? convert.toSignalK('unixdate', forecast.sunrise).value : noVal),
+            buildDeltaUpdate(forecastSunset, forecast.sunset !== null ? convert.toSignalK('unixdate', forecast.sunset).value : noVal),
 
             buildDeltaUpdate(simpleDescription, weather.description !== null ? weather.description : noData),
-            buildDeltaUpdate(fullIcon, forecast.icon !== null ? forecast.icon : noVal),
-            buildDeltaUpdate(fullMain, forecast.main !== null ? forecast.main : noVal),
+            buildDeltaUpdate(fullIcon, forecast.icon),
+            buildDeltaUpdate(fullMain, forecast.main),
 
-            buildDeltaUpdate(simpleTemp, weather.temp !== null ? weather.temp : noVal),
-            buildDeltaUpdate(fullTempMin, full.temp.min !== null ? full.temp.min : noVal),
-            buildDeltaUpdate(fullTempMax, full.temp.max !== null ? full.temp.max : noVal),
-            buildDeltaUpdate(fullFeelsLike, full.feelslike !== null ? full.feelslike : noVal),
-            buildDeltaUpdate(simplePressure, weather.pressure !== null ? weather.pressure : noVal),
+            buildDeltaUpdate(simpleTemp, weather.temp),
+            buildDeltaUpdate(fullTempMin, full.temp.min),
+            buildDeltaUpdate(fullTempMax, full.temp.max),
+            buildDeltaUpdate(fullFeelsLike, full.feelslike),
+            buildDeltaUpdate(simplePressure, weather.pressure),
             buildDeltaUpdate(simpleHumidity, weather.humidity !== null ? convert.toSignalK('%', weather.humidity).value  : noVal),
-            buildDeltaUpdate(fullDewPoint, full.dewpoint !== null ? full.dewpoint : noVal),
-            buildDeltaUpdate(fullUVIndex, full.uvindex !== null ? full.uvindex : noVal),
-            buildDeltaUpdate(fullClouds, full.clouds !== null ? full.clouds : noVal),
-            buildDeltaUpdate(fullVisibility, full.visibility !== null ? full.visibility : noVal),                       
-            buildDeltaUpdate(fullWindSpeed, full.wind.speed !== null ? full.wind.speed : noVal),
+            buildDeltaUpdate(fullDewPoint, full.dewpoint),
+            buildDeltaUpdate(fullUVIndex, full.uvindex),
+            buildDeltaUpdate(fullClouds, full.clouds),
+            buildDeltaUpdate(fullVisibility, full.visibility),                       
+            buildDeltaUpdate(fullWindSpeed, full.wind.speed),
             buildDeltaUpdate(fullWinDir, full.wind.dir !== null ? convert.toSignalK('°', full.wind.dir).value : noVal),                       
             buildDeltaUpdate(simpleRain, weather.rain !== null ? weather.rain : {}),
-            buildDeltaUpdate(simpleWeatherCode, weather.weathercode !== null ? weather.weathercode : noVal)
+            buildDeltaUpdate(simpleWeatherCode, weather.weathercode)
         ];
         case 'meta-simple': return [
             buildDeltaUpdate(simpleTemp, { units: "K" }),
diff --git a/package.json b/package.json
index e83d99a..0999a15 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "openweather-signalk",
-  "version": "0.5.2",
+  "version": "0.6.0",
   "description": "SignalK plugin to provide data from OpenWeather Service",
   "main": "index.js",
   "scripts": {