Energy consumption calculation - problem with reset

Setup, Configuration and Use Scripts & Rules
1

I have a item where is value of the energy consumption normaly still increasing.
But when there is power shut down or unit restart, this counter start again from zero :

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To calculate consumption from this value for actual day, I’m using function

val ZonedDateTime zdt = ZonedDateTime.now()
val actual_day = zdt.withHour(0).withMinute(0).withSecond(0)
val today = Cons_Value_as_Number.deltaSince(actual_day) as Number

It’s working when there isn’t a restart, because then I have a negative value for this one day when reset to zero happened

Do you have any idea how to treat this special case, when counter goes to zero?

Thanks

Alex

2

if (Cons_Value_as_Number.minimumSince(actual_day).state == 0) ???

3

As example. from 0:00 till 8:00 value increased from 200 to 250
Then there is a reset to zero and till 10:00 when calculation is done increased to 20

My function will show -180 (20-200)
but
Real consumption is 70 ((250-200) + (20-0))

Not sure how your if (Cons_Value_as_Number.minimumSince(actual_day).state == 0) ???
will solve my problem

4

minimumSince() returns a historic item. Historic item has a timestamp. Convert this timestamp to a ZonedDateTime, substract one second.
Use deltaBetween(startOfDay, timestamp) to get the sum until reset
Use deltaSince(timestamp) to get the rest of day
Add both values and you are done.

1 Like
5

oh so, thanks
Will try