Sunrise verses Season verses Wakeup time

[jim_]

Trying to write a wakeup program that compares Sunrise and a wakeup time taking into account the season. Let’s say high summer, Sunrise is before wakeup time and I don't want the lights on, but in winter, wakeup is long before Sunrise, so turn the lights on until Sunrise turns them off.

 

Given that Wakeup is fixed at 6:00AM during weekdays and Sunrise varies every day, how does one create the logic

(Sunrise is false and time is 6:00 AM) = True, turn light on … else do nothing

 

If

        On Mon, Tue, Wed, Thu, Fri

        Time is NOT Sunrise

And

       On Mon, Tue, Wed, Thu, Fri

        Time is  6:00:00 AM

 

Then

        Set 'Wakeup Light' On

[stusviews]

I use four programs that depend on the season. This is the first year I'm doing this and need to experiment with the offsets. I chose to start with the dates midway between each equinox and solstice. Here's the current (winter) sunset program:

 

If
        From    12:01:00AM on 2014/11/06
        To      11:59:00PM on 2015/02/02
    And Time is Sunset  - 15 minutes
 
Then
        Run Program 'Sunset Lighting' (If)
        Run Program 'Sunset Shading' (Then Path)
 
Else
   - No Actions - (To add one, press 'Action')
 
Note: the dates are year/month/day

[cmccartney]

I use this logic to set a flag (a state variable) and another program to actually do the work:

 

If
        From     4:45:00AM
        To      Sunrise (same day)
    And (
             On Mon, Tue, Wed, Thu, Fri
             Time is  4:45:00AM
          Or On Sat
             Time is  6:00:00AM
          Or On Sun
             Time is  6:30:00AM
        )
    And $i.Holiday is not 1
 
Then
        $s.Dawn  = 9
        $s.Dawn Init To $s.Dawn
 
Else
   - No Actions - (To add one, press 'Action')
 
This program sets the Dawn flag in order to turn on some lights
just before we normally rise and shine, except on holidays.

The first IF in this program will only set the flag if it
is still dark (pre-sunrise) i.e., not during the summer months,
especially on weekend mornings.

The 'Init' function maintains the variable's state over ISY restarts.

[Xathros]

Jim-

 

Try this:

 

Define an integer variable: i.Daylight

 

Program: Daylight

If
        From    Sunrise
        To      Sunset  (same day)
 
Then
        $i.Daylight  = 1
 
Else
        $i.Daylight  = 0
 

Program: Wakeup

If
        Time is  6:00:00AM
    And $i.Daylight is 0
 
Then
        Set Scene 'MBR Lights' On
 
Else
   - No Actions - (To add one, press 'Action')

Hope this helps.

 

-Xathros

[jim_]

Quick Thank You for your suggestions, Good samples to learn from ... 

[apostolakisl]

Trying to write a wakeup program that compares Sunrise and a wakeup time taking into account the season. Let’s say high summer, Sunrise is before wakeup time and I don't want the lights on, but in winter, wakeup is long before Sunrise, so turn the lights on until Sunrise turns them off.

 

Given that Wakeup is fixed at 6:00AM during weekdays and Sunrise varies every day, how does one create the logic

(Sunrise is false and time is 6:00 AM) = True, turn light on … else do nothing

 

If

        On Mon, Tue, Wed, Thu, Fri

        Time is NOT Sunrise

And

       On Mon, Tue, Wed, Thu, Fri

        Time is  6:00:00 AM

 

Then

        Set 'Wakeup Light' On

 

You almost had it.

If      
        On Mon, Tue, Wed, Thu, Fri
        From     6:00:00AM
        To      Sunrise (same day)
 
Then
        Set Scene 'Wakeup Light' On
        
Else
        

This program only runs true at 6am if the sun hasn't risen.  If sunrise happened before 6am, it runs false at 6am.  It also runs false at sunrise.  So if you want to also use the else clause, keep those things in mind.

 

In a "from to" program, if the "to" is before the "from", it will be false.  Both the "from" time and "to" times will trigger the program no matter what, just at some times of the year both triggers will run false and at other times the "from" will be true.

Edited December 17, 2014 by apostolakisl

[Xathros]

You almost had it.

If      
        On Mon, Tue, Wed, Thu, Fri
        From     6:00:00AM
        To      Sunrise (same day)
 
Then
        Set Scene 'Wakeup Light' On
        
Else
        

This program only runs true at 6am if the sun hasn't risen.  If sunrise happened before 6am, it runs false at 6am.  It also runs false at sunrise.  So if you want to also use the else clause, keep those things in mind.

 

In a "from to" program, if the "to" is before the "from", it will be false.  Both the "from" time and "to" times will trigger the program no matter what, just at some times of the year both triggers will run false and at other times the "from" will be true.

Nice!  Clean and simple.  Why didn't I think of this...

 

-Xathros

[oberkc]

Nice!  Clean and simple.  Why didn't I think of this...

 

-Xathros

I am equally upsdt that I did not think of this approach.I would have taken your approach, except for the variables (use program status instead...variables seem unnecessary for this application). As one who sees elegance in simplicity, my admiration goes out to apostolakisl.

[apostolakisl]

I am equally upsdt that I did not think of this approach.I would have taken your approach, except for the variables (use program status instead...variables seem unnecessary for this application). As one who sees elegance in simplicity, my admiration goes out to apostolakisl.

 

Well, I am not sure I invented this approach.  I did have to run some experiments to find out what happens when the "from" time is after the "to" time, but I was probably discovering something that was already known.  To be fair, using variables for "daylight hours" has advantages as well.  Mostly, it opens up when you want to have more complex conditions that don't trigger on the "from" and "to" times and also it allows you to use the else clause.

[oberkc]

Well, I am not sure I invented this approach.  I did have to run some experiments to find out what happens when the "from" time is after the "to" time, but I was probably discovering something that was already known.  To be fair, using variables for "daylight hours" has advantages as well.  Mostly, it opens up when you want to have more complex conditions that don't trigger on the "from" and "to" times and also it allows you to use the else clause.

True, there could be a global use for "daylight hours", but (being the fan of simplicity that I am) there is no need for variables in some cases:

 

If

Time is from sunrise

To sunset

Then

Nothing

Else

Nothing

 

This program will be either true or false, based on time of day, and could be used as a program conditon as well (no variable needed). If, however, one wanted a program condition that was not a program trigger, then the variable has an advantage, yes.

[apostolakisl]

True, there could be a global use for "daylight hours", but (being the fan of simplicity that I am) there is no need for variables in some cases:

 

If

Time is from sunrise

To sunset

Then

Nothing

Else

Nothing

 

This program will be either true or false, based on time of day, and could be used as a program conditon as well (no variable needed). If, however, one wanted a program condition that was not a program trigger, then the variable has an advantage, yes.

 

Yes, I actually have that very program.  I wrote it before variables existed.  That program will be a trigger when it changes conditions, so in that respect, you might still prefer an integer variable for certain applications.

 

But as far as the OP's needs are concerned, it is a no-brainer to just use the simple program.