Hello Everyone…
i’m kinda new to the community 
i’m trying to fetch energy values from my HA to a grafana dahsboard using LTSS …
i have an entity (reading from a slimeleezer) that get data of energgy consumtion in kilowatt,
every other seconds…
Ofc i want to have something like kw/min or kw/h to be able to dash that …
i’ve discovered the Riemann Sum thing , but if i try that, my values are ever growing 
…
i want something with a minute precision or something… how can i achieve this?
Thanks