Because openHAB 2.x rules use Jodatime instead of Java Time API, there is still the old DateTime Conversion thread for openHAB 2.x . Overview In openHab 3.x there are different ways to handle Date/Time values. DateTimeType A DateTime Item carries a DateTimeType . Java Time By default openHAB …

#5: val MyZoneDateTime = ZoneDateTime.parse("2020-12-25T00:00:00.000Z").withZoneSameInstant(ZoneId.systemDefault())

#4 Get Java Time from DateTimeType Tested in OH3, works fine: val MyJavaTimeFromDateTimeItem = (MyDateTimeItem.state as DateTimeType).getZonedDateTime()

Hello, I had in OH 2.5 the following rule - that calculates my power consuption for one day: rule “Strom Verbrauch Tag” when tem homematic_stecker_Energiezaehler_kwh received update then if(homematic_stecker_Energiezaehler_kwh.state instanceof Number){ Stromzaehler_Verbrauch_Tag.postUpdate(h…

[image] wellem: withTimeAtStartOfDay [image] Help rewriting a rule without JodaTime Migration These are my favorites:

Hello, I didn’t understand Java at all. I need to convert now.getWeekOfWeekyear in oh3 format because now one rule dont work properly. Many thanks

Hi, When rewriting my rules for OH3, I encountered a problem with the conversion between DateTimeType and Java Time: for some reason, when I convert Java Time to String, the name of my timezone is added to the string, e.g. 2021-01-01T07:00+01:00[Europe/Amsterdam]. This probably has to do with the t…

[image] bartkummel: I was able to solve both issues by using a formatter: You can use the .toLocaleDateTime method to get the time with the time zone. Then you don’t the formatter. See: ZonedDateTime (Java SE 11 & JDK 11 ) And LocalDateTime (J…

#7 now.toInstant.toEpochMilli now.toEpochSecond * 1000

#6 val zdt = Instant.ofEpochMilli(XXX).atZone(ZoneId.systemDefault()) val zdt = ZonedDateTime.ofInstant(Instant.ofEpochMilli(XXX), ZoneId.systemDefault())

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DateTime Conversion (openHAB 3.x)

Tutorials & Examples

wellem (Michael) December 28, 2020, 3:56pm 15

thanks - now it works

I replaced

now.withTimeAtStartOfDay

with

ZonedDateTime.now().with(LocalTime.MIDNIGHT)