Cron expression in if statement

Setup, Configuration and Use Scripts & Rules
1

Dear Community!

I want to have some simple rule which will take my motion sensor and if it nightime, it should turn on a lamp.

So in general I want to have something like this:

rule "Turn on lamp at night"
when
       Item zone1 received update ON
then
      if(Time cron " 0 0 22-5 ? * * *") {
           // Turn on the lamp and start a timer to turn it off automatically after some time...
      }
end

Is this possible? I have only used cron expressions one time yet, and it was pretty simple, but now I’m stuck, what is the best option here…
Also is it somehow possible to restart the timer of the Expire binding? Like if this rule turns on the lamp, starts the timer and you trigger it again before the timer expires, it will restart the timer?

Thanks!

2

Easiest way to do that is using the expire binding:

And for your “night time”:

3

… but you still could use something like

if (((now.getHourOfDay() >= 21) || (now.getHourOfDay() <= 5)) {
          // Turn on the lamp and start a timer to turn it off automatically after some time...
}
4

Just postUpdate or sendCommand to the Item. See Design Pattern: Expire Binding Based Timers

5

Thank you, I’ll try these!