Ubuntu 19.10 running openhab. I have a power meter setup, wich sends the total kwh used in MQTT wich is read and posted on my sitemap. Thing is, the numbers look like this 12227297 KWh and i would really like to format it into something more readable, like 12.23MWh. I know i can adjust the number …

Hi I had a similar situation with an energy monitor. In the end I created another Item and used a rule to do the math and post the new valve into the new Item. It works quite well, as now I can show kWh and Wh in the same UI.

Hi, do you have the chance to convert before sending to MQTT?

To process an Item state value for display, without altering the state itself,use a transform in Item or sitemap label format (the [part]). A transformation can multiply, round etc. as you wish.

Text item=AMS_Malerstand label=“Målerstand [%.0f KWh]” This is how my item looks now, wich works. But again i would like to divide the number by 1000 to get Mwh instead. Im not sure i quite understand how to apply a transformation here.

[image] Kimzer: But again i would like to divide the number by 1000 to get Mwh instead. How is your item defined? As a UoM (Unit of Measurement) Energy? Then you can easy convert to Mwh just by using [%.0f MWh] in your sitemap.

This thread is about using transforms in [labels] to modify displayed Item states. [image] [SOLVED] Converting minutes into hour Items & Sitemaps Evening, I currently display total runtime of a device in minutes in the following item on sitemap. Number MyDevi…

Have been reading thru that thread for a while now, and others. And i cant get it to work. This is where i am at: Text item=AMS_Malerstand “Målerstand [JS(kwh-to-mwh.js):%.2f]” JS file: (function(i) { return parseFloat(i) / 1000; })(input)

So, what happens, or doesn’t happen? What does openhab.log have to say about it, if anything? Have you installed the JS transformation service? What is your Item type?

Get this error, js transformation service is installed yes. 2020-02-03 09:10:40.372 [WARN ] [el.core.internal.ModelRepositoryImpl] - Configuration model ‘default.sitemap’ has errors, therefore ignoring it: [24,27]: extraneous input ‘“Målerstand [JS(kwh-to-mwh.js):%.2f]”’ expecting ‘}’

Okay, something wrong with the sitemap, not the transform (yet). The å makes me think of character encoding, perhaps. Or maybe the wrong kind of quotemarks, cannot tell without use of code fences in posts.

Number formatting

Setup, Configuration and Use Items & Sitemaps

rossko57 (Rossko57) February 1, 2020, 10:52pm 7

This thread is about using transforms in [labels] to modify displayed Item states.