Currently I have some Whisper files used by DataYours that been working well for ages and do what I want.
One of the files is called Watts_L1.d.wsp and uses this retention from "storage_schemas_conf" in openLuup file virtualfilesystem.lua:
[day]
pattern = \.d$
retentions = 1m:1d
Inside the actual "Watts_L1.d.wsp" file is a header like so:
1, 86400, 0, 1
84, 60, 1440
The 1, 86400 is one minute & one day (in minutes) as per the retention listed above. As a side issue I would like to know what the other header values mean ie what's the syntax here?
New challenge: I now have three Shelly variables named:
em1/0/act_power
em1/1/act_power
em1/2/act_power
with a device ID of "10006" and a SID of "shellypro3em"
And I would like to plot them using the Historian, just like I do with Watts_L1.d.wsp in DataYours. So I need a file in the history directory for the data. So I looked at doing this:
local whisper = require "openLuup.whisper"
-- Syntax: history/0.deviceNumber.shortServiceId.variableName
local filename = "history/0.10006.shellypro3em.em1/0/act_power.wsp"
local archives = "1m:1d"
whisper.create (filename,archives,0)
Problem is that the variable names contains forward slashes, which are invalid filename characters. What to do?
Also should the retentions now be (to suit the latest openLuup software)?:
local archives = "1m:1d,10m:7d,1h:30d,3h:1y,1d:10y"
Also "shellypro3em" is not a "shortServiceID" as per those listed in "servertables.lua". So can "shellypro3em" be used instead? ie can both short and long service IDs be used in the above call to whisper.create?