Calculate with lengths

[Graefe (Thomas)]

Hi, I have the following items:

Number:Length CurrentRain “Current rain [%d mm]”
Number:Length RainToday “Sum of todays rain [%d mm]”

Now I would like to perform a calculation in the rules:

RainToday.postUpdate(CurrentRain.state as Numbers + RainToday.state as Numbers)

This calculation results in a faulty position after decimal point (0,001mm instead of 1,0mm).
What am I doing wrong?
Thank you!

[Bruce_Osborne]

Try something from this thread? You need to account for the units of measurement.

Working with Number:Temperature item type

I recently started using the Wunderground binding, which exposes things with the type of Number:Temperature. PaperUI and HABmin both filter the items to which I can link these things so that only items of the Number:Temperature type are available. That’s not a problem in itself, and the linking works just fine. I can see the the Number:Temperature has the benefit of applying a specific format whenever it’s converted to string on the UI. That makes sense. The problem comes when I try to make com…

[Graefe (Thomas)]

Thank you. Replacing

as Number

with

as QuantityType

helped!