Sunrise and sunset

Sunrise and sunset move by more than four hours through the year. A clock time for the curtains is wrong most of the year, and changing it every few weeks is the kind of chore a house should do itself. The Engine calculates sunrise and sunset every day from the latitude and longitude of the home, so this scene never needs a clock time changed.

A sun time can be moved by minutes: sunset - 30 is half an hour before sunset, sunrise + 30 half an hour after sunrise. The lamps come from the Hue agent and the curtains from the Matter agent, and both announce themselves. The holiday variable is the same one the front door example uses, switched from Emma's phone.

// Homylon Scene SunUpSunDown
// Curtains and lights that follow the sun, all year round, without a single clock time to change.

define home jensenhouse latitude 52.09 longitude 5.12    # the Engine needs this for sunrise and sunset

// The lamps come from the Hue agent and the curtains from the Matter agent. Both announce
// themselves, so they need no definition here.

sub warmwhite by FFD8A0
define room livingroom lights sofalamp, readinglamp, diningtable

holiday = no

// The evening: half an hour before sunset, when it gets dim indoors, the lamps come on.
// At sunset the curtains close and the porch light goes on
when time sunset - 30 then light livingroom on warmwhite brightness 40 fade 10

when time sunset then
    close curtain livingcurtains, diningcurtains
    light porchlight on warmwhite brightness 60
end

// Bedtime: the porch light goes out
when time 23:30 then light porchlight off

// The morning: on weekdays the house wakes at 07:00. When the sun is not up yet,
// the lamps come on gently; the curtains wait for the sun
when time 07:00 and monday, tuesday, wednesday, thursday, friday then
    if time < sunrise then
        light livingroom on warmwhite brightness 30 fade 30
    end
end

// At sunrise the curtains open, unless the family is away: then they stay closed
// an hour longer, so the house does not open up while nobody is there to see it
when time sunrise then
    if not holiday then
        open curtain livingcurtains, diningcurtains
    else
        after 3600 do
            open curtain livingcurtains, diningcurtains
        end
    end
end

// Half an hour after sunrise it is light enough indoors: the lamps go out
when time sunrise + 30 then light livingroom off fade 30

What the Jensens get:

• Evening: half an hour before sunset, when it gets dim indoors, the living room lamps fade in. At sunset the curtains close and the porch light comes on. At half past eleven the porch light goes out.
• Weekday mornings: at seven the lamps come on gently, but only while the sun is not up yet. In summer they stay off.
• Sunrise: the curtains open, and half an hour later the lamps fade out.
• On holiday: the curtains stay closed an hour longer, so the house does not open up at dawn while nobody is there to see it.

A when fires at one moment, so when time sunset - 30 fires once a day, at that moment. To check whether it is dark at some other moment, use an if, for instance if time between sunset sunrise, as the front door example does. To try a rule without waiting for the sun, give it a clock time for a moment, for instance when time 17:05 then, and watch it on a monitor.