Hi all. just started using OpenHAB and loving it so far even with my limited coding skills. I have two z-wave switches controlling a heating cable on my roof and would like to track time they have been on and energy used by them (power is a constant of 1800W). I cannot figure out how to track numb…

Hi, as your rule can trigger several times without changing the state, I would seperate the tracking into another rule. The variable declarations need to go to the top of the file below the import statements: var DateTime RoofEnabled // time when heating was switched on var DateTime RoofDis…

was getting errors on data types with above (int vs number and similar). got it to store a sample value in rrd4j but can’t get that to display in sitemap - assuming type mismatch. current rule: rule "track roof state" when Item Roof changed then var long RoofCableStart var long RoofCableS…

very close but getting an error with data types in openHAB designer: “type mismatch: cannot convert from org.openhab.core.types.State to java.lang.Number” on line: val long oldVal = if(RoofRuntimeMsec.state == Undefined || RoofRuntimeMsec.state == Uninitialized) 0 else (RoofRuntimeMsec.state as N…

just an update on this: “val double hours = totalMsec/1000.0/60.0/60.0” is now returning correct number of hours. “Incompatible types. Expected double or java.lang.Double but was java.math.BigDecimal” and “type mismatch: cannot convert from org.openhab.core.types.State to java.lang.Number” are …

[image] bakir: val long oldVal = if(RoofRuntimeMsec.state == Undefined || RoofRuntimeMsec.state == Uninitialized) 0 else (RoofRuntimeMsec.state as Number).longValue [image] bakir: “type mismatch: cannot convert from org.openhab.core.types.State to java.lang.Number” This should be: (Ro…

Rich thank you very much! This is now perfect and calculates time on and energy used in kWh. This is the full working setup for anyone looking to do this in the future: ITEMS: Number RoofRuntimeHours “Roof Cable Runtime [%.2f h]”// used on sitemap Number RoofRuntimeMsec // used to store interm…

i do something similar, but different. (might not have if i saw this first though) i’m logging details about when my water well pump is on. rules of a similar nature determine how many seconds it was ON, at the time it goes OFF. this value, the time it was ON, gets persisted (mysql) at the time it…

[image] abraxas1: gets persisted (mysql) This is a key point in your approach. Because of how rrd4j “complresses” data it might not be a suitable solution for this sort of data analysis. [image] abraxas1: kWhr data is generated on the fly, not persisted. don’t know if i need to persist i…

Dear bakir, which z-wave devices you used? How to install and connect them to OH ? Can you show me some tutorials?

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Calculate time on and energy use for an item/switch rule

Setup, Configuration and Use Scripts & Rules

rlkoshak (Rich Koshak) November 30, 2015, 6:32pm 4

There is a long thread here where I helped someone implement just such a counter for a generator.