saving cumulative readings for idm/netidm

[fcovatti]

I did some changes in rtlamr-collect in order to save also the cumulative energy readings for IDM and NetIDM meters. In this way it is possible to have both differential and cumulative on the influx database.

I am not sure if you want to merge this, but I am creating the pull request so you can check if it is interesting to merge. I did test on Itron meters and the total consumption values worked.

[bemasher]

Does eb04c475c2cef03a8745de256e876b4e9b881e0a meet your needs?

• Includes LastConsumption, LastGeneration, and LastConsumptionNet
• Does not hard-fail when NewPoint produces an error (not sure what cases cause errors, but don't want to discover it later).
• Use message time - interval offset for point time, should be within a few 10's of milliseconds on repeated consumption values so we can avoid inserting duplicate data.

I don't have easy access to NetIDM meters in my area, would you be willing to test that this commit does what you want?

[fcovatti]

Great. Much better coding :)

The only thing that does not capture is that rtlamr reports for IDM meters in the JSON "LastConsumptionCount" instead of "LastConsumption" (which is on NetIDM Json).

One possibility would be to change the rtlamr code to have both IDM and NetIDM using the same name for the Last Consumption. Or on rtlamr-collect create a if that save consumption depending on IDM or NetIDM.

https://github.com/bemasher/rtlamr/blob/master/idm/idm.go#L192

[bemasher]

This should do it: 5d1bcddce63777d439c001f443db7aeae728eaaf

[fcovatti]

Awesome. Thanks so much