Date time transfer into item from the rule

[alda1 (Alex Needle)]

In the rule I want increase a time about 4hours and then transfer into item (type DateTime). This item (time) I want use for start of any other rule in specific time:

I tired this :

val ZonedDateTime zdt = ZonedDateTime.now().plusHours(4)
postUpdate(myItem, zdt)

but it doesn’t work. myItem isn’t updated

[Udo_Hartmann]

See this topic:

DateTime Conversion (openHAB 3.x)

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 3.x Rules DSL use java.time API to represent date and time. Principle java date-time concepts are LocalDateTime (date and time without any offset or time-zone) and ZonedDateTime (“full” date-time wit…

zdt here is of type Java Time, so you have to use

val DateTimeType myDateTimeType = new DateTimeType(zdt) // conversion

[alda1 (Alex Needle)]

This works:

val ZonedDateTime zdt = ZonedDateTime.now().plusHours(4)
val DateTimeType myDateTimeType = new DateTimeType(zdt)
postUpdate(myItem, myDateTimeType)