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House Occupancy - check my logic to determine





Looking for some input into the logic for a scene before I begin to code....


Background - I am looking to determine occupancy both upstairs and downstairs in my house. A lack of occupancy in either floor would then trigger lights/music/etc to be switched off. Lack of occupancy on both floors would assume no house occupancy (with some other checks ) and this can be used to auto-set our house alarm. No movement detected for 30 mins assume no occupancy. I am using my standard alarm PIR's as I can see status of those in my HC2


approach...for first floor...


assume no occupancy (uo_occup = "no")


1) PIR trigger in landing starts scene

2) sets up_occup variable to 'yes'

3) start counter  

4) recheck every 15 seconds - if PIR =yes then reset counter

                                           - if PIR = no then increment counter

5) if counter reaches 120 ( this is 30 mins at one check per 15 seconds) then set up_occupancy = 'no'

6) Scene stops


Next breach starts the scene again


Some peripheral checks to cover corner cases.....

If Alarm = partsetA then up occupancy = yes and hence house occupancy  = yes

If Alarm = Fullset then house occupancy is no

If back or front door is opened then down_occupancy = yes 


Do people think this would work or are they other approaches ?





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