I can't get prefixes to work with DataAmount (UoM)

Setup, Configuration and Use Items & Sitemaps
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Here I’d like to present another workaround for others who maybe have the same problem and are reading this.
The principle is to store the raw value as a plain Number item and convert it via the JS transformation to the desired “shape & format”.

In my very specific usecase it looks like this:
Items:

Number nas_freeram  "RAM frei [%.0f]"   (g_snmp_nas) { channel="snmp:target:nas2104:freeMem" }
Number nas_totalram "RAM gesamt [%.0f]" (g_snmp_nas) { channel="snmp:target:nas2104:totalMem" }

Sitemap:

Text item=nas_freeram  label="RAM frei [JS(BtoGB.js):%s]"
Text item=nas_totalram label="RAM gesamt [JS(BtoGB.js):%s]"

The JS transformation is called BtoGB.js (Bytes to Gigabytes) and is stored in the transform folder:

(function(i) {
    var result = ((parseInt(i)  / (Math.pow(1000,3))).toFixed(1) + " GB")
    return result;
})(input)

Now the sitemap for example converts the “raw” item state 8785828471 to 8.8 GB which is then shown in the sitemap.

Hope this maybe helps somebody! :slight_smile:

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