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Thread: Automation based on state of combination of (virtual) switches + timers

  1. #1
    Automated Home Lurker
    Join Date
    Apr 2016
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    2

    Default Automation based on state of combination of (virtual) switches + timers

    Hi

    I'm using ST, IFTTT, Evohome and smartphone motion sensors to automate my heating so that:

    - it switches off when both my wife and I leave the home (which I do without IFTTT)
    - when one of us returns home (also without IFTTT)
    - and when one of us enters West London (on the assumption that we're coming home, so that the heating can get a headstart), which I do using IFTTT and a virtual 'AWAY' switch in ST (which switches off the heating via IFTTT), as IFTTT can't change the Mode.

    However, this last Use Case isn't perfect, as sometimes we enter West London but aren't coming straight home, or we might dip back into the area on the non-linear route somewhere else. I don't mind the heating going on briefly but if we're going away for a period of time this could result in the heating being left on for a long time.

    So I'd like to programme the system to turn off again a) if we leave West London again and b) if we don't reenter the house 45 minutes after the 'reentering West London' signal is received.

    However, as there are two of us, the logic for this gets a bit more complicated as if I leave West London again my wife might still be travelling home etc.

    For A)

    I'd like to use two virtual switches for my wife (H) and I (T) (T returning, H returning), and switch off the Away switch if either of these switch on. However, how can I make them switch the Away switch back on if and only if they both are both Off?

    For B)

    is there a way to make a switch turn back to Off after 45 minutes if one of us doesn't return home (changing the mode)? I thought I could hack Power Allowance but this is linked to open/closed sensors which I'm not sure I can fake in the same way as Virtual Switches (as I can't tell the sensor that it's closed/open - just read its output).

    I'm aware i might be able to achieve the above by using another app in the mix (life 360?) but I'm trying to minimise the number of apps that we need to have running on our devices day-to-day.

    Thanks

    Tom

  2. #2
    Automated Home Lurker
    Join Date
    Jul 2016
    Posts
    8

    Default

    Is this in your own smart app? If not, then a custom smart app with some virtual switches is probably the easiest way.

    Action: Person A or Person B enters west London.... run code segment A

    Code segment A....
    Turn heating on....
    Set a runin timer to run in 45mins to run code segment B (this will run regardless... so in code segment B, you do some checks...)

    Code Segment B...
    If Person A and Person B is still away then
    Switch off heating
    else
    do nothing.... assume people are back.

    How you do this is up to you.... but as ST has not got an official integration with Evohome, probably going to have to do it via IFTTT via a virtual switch.

    So "switch heating off", you toggle a virtual switch to off. Set IFTTT to detect this toggle and to set the heating accordingly.

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