UoM - converting values

Setup, Configuration and Use Items & Sitemaps
1

An item receives from SNMP binding a dimensionless number which represents KBytes (e.g. 239000000).
I want the item to represent values as GBytes, so I did the following:

  • added Unit metadata and set the unit to „KiB“ according to the UoM documentation
  • added state description, pattern %.1f GiB
    However, the item shows 0.2 GiB instead of 239 GiB.
    Where is my error?
2

The Item type is what?

What do you see the Item changing to in events.log?

Where does the Item show the 0.2 GiB?

3

Sorry, I forgot to mention that I set the number type to Number:DataAmount

Another info (I wasn’t aware that changes on item definition raise a warning) from the log:

Unit 'KiB' could not be parsed to a known unit. Keeping old unit 'B' for item …

even KB did not work, too.

When the item changes its value the log file says:

'SNMPnas_SSD1StorageUsed' changed from 85809955 B to 85819987 B
4

OK, KiB isn’t already a known unit so you have to add a * to it to show the multiplication of the units.

Ki*B

If it’s defaulting to Bytes that explains the discrepancy in the conversion.

5

I found out that kiB is working (as opposed to the documentation). Is this a bug or is documentation wrong?

6

Probably the documentation is wrong. If you look at the base 10 kilo prefix it uses the lower case k in the docs too.

7

Ok, committed two changes on Github