How to extract hour and min from DateTime

[rossko57]

@jlikonen

Etuvalot_Off is an Item and I have defined it as a DateTime

Alright.
Datetimes in general are a complex topic, you should probably review -

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…

Don’t approach this as a trivial job at all.

Take it on trust that it is almost always best to get a DateTime Item state into a rule as a ZonedDateTime type java object, because the ZDT comes with a lot of useful methods.

logInfo("test" , "Etuvalot state " + Etuvalot_Off.state.toString)

// get OH Item state as ZDT object
val EtuvalotZDT = (Etuvalot_Off.state as DateTimeType).getZonedDateTime

// get parts
val evHour = EtuvalotZDT.getHour
logInfo("test" , "Etuvalot hour " + evHour.toString)

Be sure to tell the GUI what script language you are using.