Remember a peak value?

[readi343]

Hi all. I have a virtual device (A) which adds several values together. I want to create a new VD (B) that notes what the highest value of (A) was. So if A reached 10 yesterday, but 11 today - Device B should equal 11.

Any ideas? Thanks!

[sparkman]

That would be easy with a script that is called from an event when VD(A) changes. It would check the value of VD(A) against the value of VD(B) and if the new value was higher, change it, and if it was lower or the same, do nothing.

[randy]

Also can be done with Easy Trigger “Set Device to Expression”. Set VD[B] to Max(VD[A], VD[B]). Use the replacement variables for VD A & B.

[readi343]

Also can be done with Easy Trigger “Set Device to Expression”. Set VD[B] to Max(VD[A], VD[B]). Use the replacement variables for VD A & B.

Thanks for that. I'm a novice with this sort of thing - my VD numbers are 192[A] and 495[B] respectively. Is this the right idea?

[jvm]

readi343 - I think your expression needs to be something like ...

Max( $$DVR:192: , $$DRV:495: )

$$DVR:ref: is the replacement variable that you use in an expression to get the value of the device using the devices reference number (DVR = Device Value by Reference). Be sure that the reference number is between two colons as in the example. I think you also need a space after the trailing colon


For reference, for a list of operators you can use in an Easy Trigger expression, see: https://forums.homeseer.com/forum/ul...in-easytrigger

And instead of having your script trigger every 10 seconds, it may be better to have it trigger on any change of the underlying devices 192 or 495 so you don't miss a change and, thus, miss a peak reading.

[readi343]

readi343 - I think your expression needs to be something like ...

Max( $$DVR:192: + $$DRV:495: )

$$DVR:ref: is the replacement variable that you use in an expression to get the value of the device using the devices reference number (DVR = Device Value by Reference). Be sure that the reference number is between two colons as in the example. I think you also need a space after the trailing colon


For reference, for a list of operators you can use in an Easy Trigger expression, see: https://forums.homeseer.com/forum/ul...in-easytrigger

And instead of having your script trigger every 10 seconds, it may be better to have it trigger on any change of the underlying devices 192 or 495 so you don't miss a change and, thus, miss a peak reading.

Thanks JVM,

I was able to get that working - and for anyone following this thread in the future I had to make a couple small tweaks:

Max($$DVR:192: , $$DVR:495: )

Also thank you for the link. Scripting is very daunting when you have zero experience, but willpower prevails =)

[sparkman]

Scripting is very daunting when you have zero experience, but willpower prevails =)

That is true, but there are many of examples of scripts on the board that can get you started. Once you get going, it becomes much simpler over time and you can find many code samples on the internet. In case you were wondering, here would be the equivalent script:

Sub Main(ByVal Parms As String)
    If hs.deviceValueEx(192) > hs.deviceValueEx(495) Then hs.setDeviceValueByRef(495,hs.deviceValueEx(192),True)
End Sub

I do have EasyTrigger myself, but I have used HS for many years before it became available, so scripting is typically what I gravitate to.

[randy]

My bad! I should have pointed to replacement variables, something I usually do. It sounds like you found them, but just in case

https://help.homeseer.com/help/HS3/s...ment_variables