Controlling external light seasonally

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts
  • mcockerell
    Automated Home Sr Member
    • Jan 2009
    • 74

    Controlling external light seasonally

    Hi,

    We have a number of external lights under Cortex control and I am generally pleased with the way that I have them running.
    However, there is one thing that bugs me a little and I would appreciate some thoughts on how I might address the issue.

    At its basic level the external lights are set to come on based on time and an external light level threshold, and then go off at a set time later in the evening.
    This can be overridden in one of two ways: There is a manual override that we can use to leave the lights on when we are out for the evening, and a 'daybreak' control that turns the lights on at a set time in the morning if it is dark and someone is moving around downstairs - this deals with the 'leaving home in the dark' scenario in the winter months.
    So far, so good - so what is the issue? It's quite simple really - at this time of year the lights will regularly switch on for just a few minutes when it finally gets dark enough during the operating time period just before they are due to switch off.

    So my question is this, what is the best way to ensure that the lights don't come on in a fixed period (perhaps 15 to 20 minutes) just before they are due to go off anyway.
    I've tried setting up a virtual lamp with the same turn on time and light level settings, but with a slightly earlier switch off time, but I can't work out how to link that to the real light.
    I am using various enable/disable and mode settings to control the lights already.

    Any ideas much appreciated. And in case anybody is asking 'Why?' it has to do with when the dog and I decide to go for his 'last thing at night' walk :-)

    Thanks,
    Martin
  • chris_j_hunter
    Automated Home Legend
    • Dec 2007
    • 1713

    #2
    are you using a General Logic object ... ?

    you could use an SR-FlipFlop gate to follow the lamp(s), feeding a Delay gate ... and feeding an AND gate to test whether to turn on not ...

    or something like that ...

    Chris
    Our self-build - going further with HA...

    Comment

    • Karam
      Automated Home Legend
      • Mar 2005
      • 863

      #3
      Question is why is the light coming on in the first place? Is it because it has become dark, because someone has pressed a button, because motion has been detected and some other criteria? And do you then want to allow for one thing but not another in that time? Lighting automation not as trivial as people might initially think. One possibility is to make use of the numerical setting of the override or operating modes (probably latter in your case). If you bring up the connection menu for the light object and click on help then scroll down to Light Objects More Connections you will see these listed. You can change them for example using the scheduler (using the scheduler value output). Note - there was a bug in the scheduler time settings if trying to change times in the 23:00:00 area. This has beeen fixed but only in our development version. If you need this let us know.

      There may well be other/simpler solutions but as I say it can be a bit tricky to avoid upsetting some other behaviour when you have multiple criteria acting on an object.

      Comment

      Working...
      X