Email device variable value.

Community Playground General Discussions
#1

I would like my Vera3 (UI5) to email me the value contained in a device variable on a regular basis. Is this possible?

Thanks, JohnK

#2

Sure. Use a scheduled scene or PLEG to retrieve the value and Vera Alerts, documented here, to email it out.

#3

Thanks Z-Waver. I’ll look at your pointers.

JohnK.

#4

I have been thinking about this and rather than emailing me the variable I would like to store the data in a non-volatile file on the Vera3 (UI5). I would like to store the data as a CSV file in the format “date/time, variable_contents” and I guess the place to put it would be on the USB drive that I use for logging. Can someone give me some clues or examples?

JohnK.

#5

To answer my own question ;D

This turned out to be quite straight-forward with a bit of digging in the lua reference material.

This code reads the cumulative energy consumption and the instantaneous consumption from a Aeon Labs HEM and puts the resultant data in a file (xkwh.log) on the USB drive. This code is placed in a scene that is scheduled to run as you require.

Not elegant code but it does what I want.

[code]local file = io.open(“/tmp/log/cmh/xkwh.log”, “a+”)

local humantime = os.date(“%d/%m/%Y %H:%M:%S”)
local kwhrs = luup.variable_get( “urn:micasaverde-com:serviceId:EnergyMetering1”, “KWH”, 32)
local instwatts = luup.variable_get( “urn:micasaverde-com:serviceId:EnergyMetering1”, “Watts”, 32)

file:write(humantime)
file:write(“, “)
file:write(kwhrs)
file:write(”, “)
file:write(instwatts)
file:write(”\n”)

file:close()

return true
[/code]