Activate a switch/Relay at a specific time

Setup, Configuration and Use Beginners
1

Hi Guys,

i need again your help. Im trying to figure out how to activate a Relay daily at a specific time then have it running X seconds and then turn off.

Relais3 is the item in question here.
Now i need the starting condition (here Time) but i dont know if this works or if a cronjob has to be done here.

My code so far is:

rule “Relais off”
import Time

when

    Time(16:31)

     then
        Relais3.sendCommand(ON)
        createTimer(now.plusMillis(10000), [|
        Relais3.sendCommand(OFF)
        ])

end

Hope you can help me out here.

2

You should use a cronjob to switch it on, and another rule with a cronjob to switch it off, or you use a timer. Maybe also the expire binding could help you.
Read the docs and good luck!

3

@Soron Rule to run every day at 16:31

rule “Relais off”
when
    Time cron "0 31 16 ? * *"
then
        Relais3.sendCommand(ON)
        createTimer(now.plusMillis(10000), [|
        Relais3.sendCommand(OFF)
        ])

end
4

Please

See:

Read the docs before asking questions, please!!

5

After reading the doc’s if your still not sure about the rule with a timer here is a working example. You needed to create the var Timer like below.

var Timer startTimer = null
rule “Relais off”
when
    Time cron "0 31 16 ? * *"
then
        Relais3.sendCommand(ON)
        startTimer = createTimer(now.plusMillis(10000), [|
        Relais3.sendCommand(OFF)
        startTimer = null
        ])

end

Also, here’s a link that will help with writing rules. Lots of examples and explanations.:+1:

6

Thanks H102 so far that works.
Now to the real problems begin.

1.) I need to make the time variable so I can set it myself in openhabpanel
2.) and also adjust the timer how long it will stay on.

Any suggestion will be greatly appreciated.

7

Search the forum to see if this has been done before. If you can’t find what your looking for then start a new topic.

8