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Multi-System Reactor

Expression to randomly run Global Reactions ?

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  • cw-kidC Offline
    cw-kidC Offline
    cw-kid
    wrote on last edited by cw-kid
    #1

    Hi

    I had an MSR rule to run some LUA code that would randomly run different Vera scenes to change the colours on some garden lights, the rule would pulse every 15 minutes, so a different Vera scene was selected to change to a different colour etc.

    local scenes = {"172", "173", "174", "175", "176", "271", "272"}
    local tmp_random_number = math.random(1,7)
    local  scene_id_to_launch = scenes[tmp_random_number]
    luup.call_action("urn:micasaverde-com:serviceId:HomeAutomationGateway1", "RunScene", {SceneNum = scene_id_to_launch}, 0)
    

    This was working OK, but then I have been deleting lots of scenes off my Vera Plus and making them MSR Global Reactions instead and I forgot about this setup and now its broken as the Vera scenes have gone.

    So now I have several MSR Global Reactions for setting each colour on these garden lights. But don't know how to achieve the same thing but by using Global Reactions instead of Vera scenes.

    fe50d423-137d-438a-a090-d3cd709270be-image.png

    Anyone good with expressions ? Or another way to do this in a rule?

    Thanks

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    0
    • LibraSunL Offline
      LibraSunL Offline
      LibraSun
      wrote on last edited by
      #2

      How about having an MSR rule run at regular intervals, which would then pick a whole number between 1 and 7, and run other rules (or just do the things itself) based on the chosen number?

      If I were to lay that out, it would go something like this (in pseudocode, not actual scripting in MSR):

      Rule: RUN EVERY 15 MINUTES
      Expressions: choose = floor(random()*7+0.5)
      Triggers: Condition = Interval every 15:00 relative to midnight
      Constraints: (none)
      Set Reaction:
      [group] [expression value] [choose] [==] [1]
      [entity action] ► do the colors for scene #1
      [group] [expression value] [choose] [==] [2]
      [entity action] ► do the colors for scene #2
      [group] [expression value] [choose] [==] [3]
      [entity action] ► do the colors for scene #3
      etc.

      Reset Reaction: <empty>

      1 Reply Last reply
      1
      • cw-kidC Offline
        cw-kidC Offline
        cw-kid
        wrote on last edited by
        #3

        Hi LibraSun

        Something like that may work. I actually have a virtual switch in Vera and my previous rule was triggered when that virtual switch was turned on, it would then run the LUA code that in turn picked a random colour scene in Vera.

        It would retrigger every 15 minutes and then run the LUA code again and pick another colour scene.

        And if I turned off the virtual switch in Vera it stopped doing it and the lights were turned off etc.

        1 Reply Last reply
        0
        • LibraSunL Offline
          LibraSunL Offline
          LibraSun
          wrote on last edited by
          #4

          In that case you could definitely include the virtual switch as one of the trigger conditions. That way when the switch is off the rule won't continue running every 15 minutes.

          Also since you are not afraid of expressions, you could easily use them to create the random colors as well and use those expressions in Lua code with ${{ }} substitution.

          cw-kidC 1 Reply Last reply
          0
          • LibraSunL LibraSun

            In that case you could definitely include the virtual switch as one of the trigger conditions. That way when the switch is off the rule won't continue running every 15 minutes.

            Also since you are not afraid of expressions, you could easily use them to create the random colors as well and use those expressions in Lua code with ${{ }} substitution.

            cw-kidC Offline
            cw-kidC Offline
            cw-kid
            wrote on last edited by cw-kid
            #5

            @librasun

            What makes the expression run and generate a new number after a period of time?

            This is what I have so far.

            Trigger is the virtual switch in Vera.
            Pulse every 1 seconds and repeat every 60 seconds.

            40a55606-5dd6-4434-8131-03320411fb36-image.png

            Set Reaction - Groups that look at the expression named "ChooseColour" and its current number value and then runs a Global Reaction now directly sets that colour on the LED strip.

            c928ebf7-c1cf-4400-9230-0c3d15953375-image.png

            The random number generator expression named "ChooseColour" this is a rule expression not a Global Expression.

            b1a6ba74-2a13-40bc-b9f3-5cdebc0be840-image.png

            I added an 1 minute interval to the triggers and the virtual switch is true trigger is also pulsing every minute.

            The expression is now changing numbers every minute, but the reactions don't seem to be running as the colour is stuck and not changing.

            Also I think this expression generates the number zero which I don't have assigned to any reaction.

            LibraSunL 1 Reply Last reply
            0
            • LibraSunL Offline
              LibraSunL Offline
              LibraSun
              wrote on last edited by
              #6

              You can avoid the 0 value problem by making your expression look like:

              floor(random()*6+0.5)+1 
              

              // should produce integers from 1 through 7 inclusive.

              From your description, I think you have more than just one Triggers condition pulsing. Stick with pulsing just the device_695 is TRUE condition for 1 second, repeating every 60 seconds. I don't think you need any other conditions in Triggers.

              And looking at everything you've shown us, it seems like it SHOULD be working at this point. If not, the reason is not obvious to me. You may have to poke around in the REACTOR.LOG to see what's happening (or isn't) and when. Make sure all your Rules are Enabled!

              1 Reply Last reply
              0
              • toggledbitsT Offline
                toggledbitsT Offline
                toggledbits
                wrote on last edited by
                #7

                ANDing a pulse output with an Interval is not going to work as expected. You are trying, in effect, to synchronize two asynchronous events. You'll never get it. Remove the Interval condition. The pulse serves the purpose on its own that you're trying to get the Interval to perform.

                Author of Multi-system Reactor and Reactor, DelayLight, Switchboard, and about a dozen other plugins that run on Vera and openLuup.

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                • cw-kidC Offline
                  cw-kidC Offline
                  cw-kid
                  wrote on last edited by
                  #8

                  @toggledbits @LibraSun

                  Thanks guys. OK I have removed the interval and just have the trigger that the virtual switch must be true and I have a pulse for 1 second and to repeat every 60 seconds, just for testing, I'll set this to a longer time later.

                  I have also updated the expression with the new one to get rid of 0.

                  I have also changed the Reactions to directly set the colours of the light rather than calling the Global Reactions to do it.

                  It seems to be working, however there seem to be something strange going on with pulses and repeats ?

                  When the break count reaches zero the random number in the expression is changing quickly through 3 different numbers, which is weird.

                  Also if you set the pulse to say 15 seconds and the repeat to 60 seconds it's not behaving as I would expect ?

                  In this case when the break counter reaches zero the expression number changes to a different number, it then changes to a pulse counter for 15 seconds and when that reaches zero the expression number changes again.

                  I only expected it to change the expression number when the repeat count down from 60 seconds reaches zero not also when the pulse counter reaches zero.

                  Is this a bug or am I not understanding things correctly?

                  Thanks

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                  • toggledbitsT Offline
                    toggledbitsT Offline
                    toggledbits
                    wrote on last edited by
                    #9

                    Each change in the edge of the pulse necessarily causes a re-evaluation of the rule because the condition state may change, which in turn may change the state of the parent groups/containers. So the sequence of what you will see is: pulse true -> reevaluation -> rule set -> pulse delay -> pulse false/break start -> reevaluation -> rule reset -> break delay -> break end/pulse true -> reevaluation -> rule set ... etc...

                    Since your actions only run when the rule sets, you still only get one set per pulse; the change in the random value has no effect in any other evaluation.

                    Author of Multi-system Reactor and Reactor, DelayLight, Switchboard, and about a dozen other plugins that run on Vera and openLuup.

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                    • LibraSunL Offline
                      LibraSunL Offline
                      LibraSun
                      wrote on last edited by
                      #10

                      ...and I believe the only way to alter that arrangement (not that there's anything WRONG with how it's currently operating!), would be to affirmatively evaluate the random number using an expression tucked into the first step of your Set Reaction:

                      [Set Variable] [chooseColor] [ ${{ floor ( random ( ) * 6 + 0.5 ) + 1 }} ]
                      

                      Of course, for this setup to work, your chooseColor expression would have to be blank (otherwise, assignment doesn't work). I'm 99% confident that assigning the variable value at the outset of Set Reaction would indeed get it there in time for the subsequent case-by-case Group Constraints to utilize it as desired, but honestly I have not tested such a scenario. Worth trying, if your OCD doesn't like all those "extra" random values happening, LOL!

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                      0
                      • toggledbitsT Offline
                        toggledbitsT Offline
                        toggledbits
                        wrote on last edited by toggledbits
                        #11

                        This is also correct (a Set Variable can be used, and will evaluate/set before the groups -- in order shown, basically). In fact, this is the way I would do it for myself, for the very reason @LibraSun recommends: it stabilizes the value, and would do so in circumstances where the usage is more complex and the debugging would be made more difficult by the rapid changes otherwise.

                        EDIT/NOTA BENE: A bit of a trap here was discovered later. Be sure to read this later post. The recommended action for this purpose/implementation is to not use a Set Variable action to choose a random value. The linked post explains why.

                        Not that it much matters, but the random expression can also just be written as floor( random() * 6 + 1 ) (ever so slightly optimized).

                        Author of Multi-system Reactor and Reactor, DelayLight, Switchboard, and about a dozen other plugins that run on Vera and openLuup.

                        cw-kidC 1 Reply Last reply
                        1
                        • toggledbitsT toggledbits

                          This is also correct (a Set Variable can be used, and will evaluate/set before the groups -- in order shown, basically). In fact, this is the way I would do it for myself, for the very reason @LibraSun recommends: it stabilizes the value, and would do so in circumstances where the usage is more complex and the debugging would be made more difficult by the rapid changes otherwise.

                          EDIT/NOTA BENE: A bit of a trap here was discovered later. Be sure to read this later post. The recommended action for this purpose/implementation is to not use a Set Variable action to choose a random value. The linked post explains why.

                          Not that it much matters, but the random expression can also just be written as floor( random() * 6 + 1 ) (ever so slightly optimized).

                          cw-kidC Offline
                          cw-kidC Offline
                          cw-kid
                          wrote on last edited by cw-kid
                          #12

                          @toggledbits @LibraSun

                          Thanks for the further suggestions.

                          I have made the "ChooseColour" expression empty and at the top of the Set Reactions I now have this:

                          af827001-5b6c-4b19-8c9f-eac7128d7150-image.png

                          The random number now only changes the once upon each repeat count down and the rule summary card now looks like this:

                          fd720374-8147-4230-81ad-a11a1ff935df-image.png

                          Its working but not reliably as the colour does not change on the light after every repeat count down. Sometimes it just stays on the previous colour that it was.

                          I have checked each Group Constraint action for each of the different colours and when pressing the Play button on each of them the LED strip does change to that correct colour.

                          And at other times the light seems to get stuck on one colour for a long time and many cycles, even though the rule is still generating numbers and then after a while it starts changing colours again, so it seems laggy.

                          Here is an example of how each Group Constraint looks:

                          cf18f604-c615-4bbb-8cdc-9f657ae17d20-image.png

                          1 Reply Last reply
                          0
                          • LibraSunL Offline
                            LibraSunL Offline
                            LibraSun
                            wrote on last edited by
                            #13

                            As of this stage, there's nothing to prevent the same color from repeating 2, 3, ... infinite times. Such is the nature of random numbers. Was it one of your prerequisites that the color always change from what it was the previous cycle? Of course, that could occasionally lead to a ping-pong of %(#fb1004)[red], %(#0bf913)[green], %(#fb1004)[red], %(#0bf913)[green], %(#fb1004)[red], %(#0bf913)[green], .... which you may also find objectionable.

                            1 Reply Last reply
                            0
                            • toggledbitsT Offline
                              toggledbitsT Offline
                              toggledbits
                              wrote on last edited by
                              #14

                              Also turn off the "Force re-evaluation of expressions" checkbox. You don't need that in this circumstance (since the use of the variable comes after the set explicitly), and it may even get in the way.

                              Author of Multi-system Reactor and Reactor, DelayLight, Switchboard, and about a dozen other plugins that run on Vera and openLuup.

                              1 Reply Last reply
                              1
                              • toggledbitsT Offline
                                toggledbitsT Offline
                                toggledbits
                                wrote on last edited by toggledbits
                                #15

                                OK... wait up... apology here. Since conditions in reactions are a new feature, even I am not completely steeped in their particular behaviors, and limitations, and I just had a "but wait..." moment.

                                All conditions are evaluated at the same time. The group constraints are evaluated at the same time as the triggers. So, while the reaction's groups will run in sequence, the constraint result is determined before the reaction is run, and therefore doing the Set Variable action in the reaction has no effect on the then-current run of the reaction. That is, even though the reaction may Set Variable to a new random number, the constraints have already been evaluated using the previous value of the variable (what is was before the Set Variable action). So this would definitely account for the "lag" that @cw-kid is observing, because the value set by Set Variable on one run of the set reaction won't be used until the next time the set reaction runs.

                                And it's still the case that random numbers are not guaranteed to repeat or even be uniformly distributed over a small (less than several million, perhaps?) sample

                                So... setting your random number in the "Expressions" section of the rule, rather than by using a Set Variable action, is probably a better implementation for this purpose (at least, will be easier to follow/debug).

                                Author of Multi-system Reactor and Reactor, DelayLight, Switchboard, and about a dozen other plugins that run on Vera and openLuup.

                                1 Reply Last reply
                                2
                                • LibraSunL Offline
                                  LibraSunL Offline
                                  LibraSun
                                  wrote on last edited by
                                  #16

                                  Glad you explained all that, because I had a sneaking suspicion that the timing (and not just the order) of the [Set Variable] was important here. Kinda hard sometimes to keep it all straight, insofar as the human is not the most "logic"-al of engines!

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                                  • cw-kidC Offline
                                    cw-kidC Offline
                                    cw-kid
                                    wrote on last edited by cw-kid
                                    #17

                                    OK understood I will change the expression back to how it was and remove the set variable in the set reaction area.

                                    I will increase the trigger repeat to 5 minutes and test it one evening when its dark outside.

                                    Ideally I'd like for a different colour each time to be selected, but I guess the expression for the random numbers could select the same number again and therefore the colour would not change for that cycle.

                                    ElcidE 1 Reply Last reply
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                                    • LibraSunL Offline
                                      LibraSunL Offline
                                      LibraSun
                                      wrote on last edited by
                                      #18

                                      Alternatively, you could randomize the color selection itself (not just limited to the 4-5 RGB choices you have now). More variety at the expense of slightly more complicated MSR expressions... but with a net savings in the number of Group Constraints required (just one instead of N for N colors).

                                      cw-kidC 1 Reply Last reply
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                                      • LibraSunL LibraSun

                                        Alternatively, you could randomize the color selection itself (not just limited to the 4-5 RGB choices you have now). More variety at the expense of slightly more complicated MSR expressions... but with a net savings in the number of Group Constraints required (just one instead of N for N colors).

                                        cw-kidC Offline
                                        cw-kidC Offline
                                        cw-kid
                                        wrote on last edited by cw-kid
                                        #19

                                        @librasun

                                        Sounds great but I don't know how to do it LOL.

                                        As is I have 7 predefined colours which are the primary hex codes for those colours, red, green, blue, purple, orange, pink, yellow.

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                                        • LibraSunL Offline
                                          LibraSunL Offline
                                          LibraSun
                                          wrote on last edited by
                                          #20

                                          You've got me curious now: What make/model of garden lights do you have? And what is their ultimate color palette? Have you tried setting them to intermediate colors using the [Set_Color_RGB] action in MSR, for instance?

                                          cw-kidC 1 Reply Last reply
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                                          • Way to search for rules (rule state) in other rules
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                                            tamorgen
                                            0
                                            3
                                            78

                                          • Links to MSR from HA
                                            Tom_DT
                                            Tom_D
                                            0
                                            1
                                            68

                                          • Set Reaction > Script Action
                                            wmarcolinW
                                            wmarcolin
                                            0
                                            11
                                            399

                                          • Wiring Samotech SM308-S into light fitting
                                            akbooerA
                                            akbooer
                                            0
                                            2
                                            128

                                          • Errors after updating to MQTTController build 25139
                                            toggledbitsT
                                            toggledbits
                                            0
                                            6
                                            230

                                          • 🎉 My very first MSR controller: OpenSprinkler
                                            therealdbT
                                            therealdb
                                            5
                                            13
                                            890

                                          • Advice reqeusted to migrate MSR from Bare Metal to Container
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                                            tamorgen
                                            0
                                            5
                                            236
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