Calculation in a rule (numbers and dates)

[muelli1967 (Jan)]

this might lead you to a solution:

[SOLVED] Rules: calculate difference between 2 DateTime in minutes

ZonedDateTime… until… ChronoUnit.TemporalUnit… import java.time.temporal.ChronoUnit ... val date_1 = Virtual_DateTime_1.getStateAs(DateTimeType).zonedDateTime val date_2 = Virtual_DateTime_2.getStateAs(DateTimeType).zonedDateTime val seconds_between = date_1.until(date_2, ChronoUnit.SECONDS) val minutes_between = date_1.until(date_2, ChronoUnit.MINUTES) val days_between = date_1.until(date_2, ChronoUnit.DAYS) val weeks_between = date_1.until(date_2, ChronoUnit.WE…

in a nutshell, you need to translate the var date to zonedDateTime. Today you get with „now“. Also consider to change sendCommand to postUpdate and make sure you send the string to the item .toString . unless you really want to action something with this item.