P1 smart meter cumulative usage graph in dashticz

[brjhaverkamp]

Hello all,

I am updating the graphs in my dashticz.
I have a P1 smart meter to register electricity and gas usage.
In the electricity part I have the daily power usage and return(generation) amounts with the datafields r1 r2 v1 and v2
But I would also like to plot the total cumulative usage. I.e. the olden-days total usage value you submit to the electricity company.
But I have no idea what the tag of that value is. I see it in domoticz in a subdevice, but the graph there doesn't give a hint and I have no idea where to get the availabile datafields and their names from structurally.
I googled a while and looked in various examples, but couldn't find anything.

So Q1: what are the field names to use in a dashticz graph for the cumulative usage? and Q2: where could I have found them?

Kind regards,

Bert