Trigger rule on DateTime item

[Lars_R]

hello Community,

Is it possible to trigger/start a rule on a specific Time, coming from an variable DateTime item (e.g. astro-items) ?? I couldn’t find anything in the documents.

Thank you

[allen]

Can you elaborate what you want to do ? that will make it easier to point you in the right Direction ?

[mstormi (Markus Storm)]

It’s awfully complicated so you won’t want to do it.
The astro binding generates events on every possible occasion, that’s way easier to trigger upon.

[Lars_R]

This is what I’m trying to accomplish

Item:

DateTime AstroDaylightEnd "[%1$ta, %1$td.%1$tb %1$tY -- %1$tR]"{channel="astro:sun:local:daylight#end"}

Rule:

rule "Irrigation start/stop"
  when
    Time Item AstroDaylightEnd ??.....??
  then
     do something

[allen]

i use the following for day/night controll of my outside ligts.

[Deprecated] Design Pattern: Time Of Day

[Edit] Adde link to Time of Day State Machine For years now I’ve let this Design Pattern post get out of hand so I’m going to rein it in a bit now. It’s really expanded away from what it’s originally intended to be (i.e. a way to illustrate how to code a time based state machine) into a thread that is mostly about the example, Time of Day. It’s partially my fault for naming the thread “Time of Day”. But there are better alternatives for Time of Day in specific and time based state machines in g…

with my rule :

rule "Stoep Light On"
when
    Item vTimeOfDay changed to "EVENING"
    
then
 if (Alarm_Status.state == "Disarmed") {
  Kitchen_Light_Stoep.sendCommand(ON) }
 if (Alarm_Status.state == "Armed-Stay") {
  Kitchen_Light_Stoep.sendCommand(ON) }
 if (Alarm_Status.state == "Armed-Away") {
  Kitchen_Light_Stoep.sendCommand(ON) }
 
end
    
rule "Stoep Light Off"
when
    Item vTimeOfDay changed to "BED"
   
then
 if ( Alarm_Status.state == "Armed-Stay" ) {
  Kitchen_Light_Stoep.sendCommand(OFF) }
 if ( Alarm_Status.state == "Disarmed" ) { 
  sendBroadcastNotification("Stoep Light Still On" + " - " + now.toString("MM/dd HH:mm ")) }
 
end

rule "Stoep Light Off Armed"
when
    Item vTimeOfDay changed to "MORNING"
then
 if ( Alarm_Status.state == "Armed-Away" ) {
  Kitchen_Light_Stoep.sendCommand(OFF) }
end

Not sure if this would help you. My Rule is still crude. but it is a work in progress as i am only beginning to use rules now.

[Lars_R]

So according to https://community.openhab.org/t/design-pattern-time-of-day/15407

this might be a solution. I’ll try this out

rule "Calculate time of day state" 
when
  System started or // run at system start in case the time changed when OH was offline
  Channel 'astro:sun:home:rise#event'    triggered START or
  Channel 'astro:sun:home:set#event'     triggered START or
  Channel 'astro:sun:minus90:set#event'  triggered START or
  Time cron "0 1 0 * * ? *" or // one minute after midnight so give Astro time to calculate the new day's times
  Time cron "0 0 6 * * ? *" or
  Time cron "0 0 23 * * ? *"
then

  logInfo(logName, "Calculating time of day...")...........

[mstormi (Markus Storm)]

@Lars_R

when Time Item AstroDaylightEnd ??..?? then

when
  Channel 'astro:sun:mythingname:set#event' triggered START
then

or trigger upon any of the other events, many to choose from - see binding docs.

Note you can also create multiple astro things, each to have a different offset.

[allen]

The DP rules Calculate the TOD
and you use that in your rule. read the whole design patern. i use the rules in the design and items . then i wrote my rule to look at the vtime of day. as my trigger and then it has actions.