How can I use Astro to have a light go on at sunset?

[Rob Goodman]

Here's what I have so far:

In my OpenHab.CFG file I included the bindings for Astro.

In my ITEMS file I have this:

DateTime Sunset_Time   "Sunset [%1$tH:%1$tM]"   {astro="planet=sun, type=set, property=end"}

I can see that I am returning the correct times because I added this line: Text item=Sunset_Time   to the .SITEMAP file.

My question is, in the Rules file, what is the syntax to have my porch lights go on at sunset? If I was going to have the lights turn on at a specific time (say 6:30 AM), I would do the following:

rule "LampOnMorning"

when Time cron "0 30 6 * * ?"

then  sendCommand(Lamp_Module, ON)

end

How would I do this for the sunset time? I tried replacing cron  "0 30 6 * * ?" with Sunset_Time but it doesn't seem to like it.

Any suggestions on actual code of getting this to work would be very much appreciated.

Thank you.

-Rob

[Kevin Gottsman]

Rob,

I use the astro binding to turn on my landscape lights every night. They turn off in the morning with the sunrise event.

Here is my items file:
*********
DateTime Sunrise_Time   "Sunrise [%1$tl:%1$tM %1$tp]"  {astro="planet=sun, type=rise, property=start"}
DateTime Sunset_Time    "Sunset [%1$tl:%1$tM %1$tp]"   {astro="planet=sun, type=set, property=end"}
Switch   Sunrise_Event                           {astro="planet=sun, type=rise, property=start, offset=0"}
Switch   Sunset_Event                            {astro="planet=sun, type=set, property=end, offset=0"}
**********

Here is my rules file:
*********
rule "Example Rule at sunrise"
when
    Item Sunrise_Event received update ON
then
    sendCommand(Switch_Landscape, OFF)
end

rule "Example Rule at sundown"
when
    Item Sunset_Event received update ON
then
    sendCommand(Switch_Landscape, ON)
**********

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[Rob Goodman]

Kevin,

That was exactly what I was looking for! It is so simple once you know how to do it. I think I was over-thinking it.

Thank you so much for sharing this. This is a great help for me.

-Rob