Reading Power Consumption with Lua out of Fibaro

[rgroothuis]

Hi,

I'm trying to find the solution how I can read the Power Consumption that is reported from a Fibaro wall-plug into Domoticz using Lua scripting. I've done some searching on this forum but couldn't find the maybe simple answer. Also not on the WIKI. Any suggestions?

I want to check the power consumption and based on the level want to take some action.

Thanks, Cheers.

[juankar]

Hi,
I don't know Fibaro, but I suppose it sends reports to Domoticz at a time interval or at value changes. If it's so you can create a script_device_<name fibaro module>.lua. In this script you can read the svalue of the device.
Example
Suppose your counter is named fibaroEnergy and it read usage (watts) and energy (kWh)
script_device_fibaroEnergy.lua

Code: Select all

commandArray = {}
local module = "fibaroEnergy"
local reading
local usage, energy
if (devicechanged[module]) then
      reading = devicechanged[module] 
    _,_,usage, energy = string.find(reading, "(.+);(.+)")

   print("Meter "..reading)
   print("Usage: "..usage.."watts")
   print("Energy: "..energy.."wh")

end

Print sentence is just for seeing the values reports by the device (you can see it in log)
Now you can compare or do anything based on energy or usage values. You can use tonumber(energy) to convert string energy into a number (for comparison or calculate).
Will this is useful for you?.
Bye

[rgroothuis]

Thanks, that is useful info. I will give it a try. My main challenge is to get the values out of the Fibaro device.

Your line:

reading = devicechanged[module] _,_,usage, energy = string.find(reading, "(.+);(.+)")

Is this an example or the correct format/syntax?

My understanding is if I use: "devicechanged[module] " then I will get the On/Off status as this Fibaro device is also a power switch.

So the main question is how to get the Watts out of the Fibaro device.

[juankar]

I wrote this script for an electricity counter. A swith will give ON/Off as status, but you spoke about an energy counder, did you?. So if you trigger the event from a switch then you can use

Code: Select all

reading = otherdevices_svalues["counter device_name"]
usage, energy = string.find(reading, "(.+);(.+)")
 

For a energy meter the svalue is a string like 25.0; 1230.000 or so. The first number before ";" is usage (watts) and the second is energy (wh). I repeat that I don't know fibaro, so I write this script based on switches I've used: Philio and Qubino switches. I think Fibaro works like them.

Bye

[rgroothuis]

Thanks for the useful tips. Based on the info provided I could make the following lines to read the power consumption out of a Fibaro wall-plug:

Code: Select all

   
BackGardenLampPowerInfo = otherdevices_svalues["BackGardenLampPower"]
start, stop = string.find(BackGardenLampPowerInfo, ";")
usage = string.sub(BackGardenLampPowerInfo, 1, start-1)
energy = string.sub(BackGardenLampPowerInfo, start+1, string.len(BackGardenLampPowerInfo))
print ('Back Garden Lamp Power consumption: ' .. usage .. ' Watt, ' .. energy .. ' wh.')

[dannybloe]

Check out dzVents. It has all the methods to get to this information in an easy (and more, much more).

[rgroothuis]

I'm still having problems with reading out the power consumption from my Fibaro wall-plug. I'm trying to get my head around it but no luck. Any support would be appreciated.

Domoticz is reading out the power consumption from the Fibaro wall-plug, see screenshot. 0.7 Watt at the moment when the picture was taken.

Screen Shot 2016-09-22 at 22.48.26.png (55.74 KiB) Viewed 3422 times

But now I'm trying to get this value within my Lua script and I only get 0 Watt. Really strange.

My Lua script snapshot:

Code: Select all

print('------ ** Test1: ' .. otherdevices['BackGardenLampPower'] .. '.')
print('------ ** Test2: ' .. otherdevices_svalues['BackGardenLampPower'] .. '.')

And the Domoticz log:

Code: Select all

2016-09-22 22:58:00.060 LUA: ------ ** Test1: .
2016-09-22 22:58:00.060 LUA: ------ ** Test2: 0.000;45240.000.

Any idea why in Lua I get 0.000 and not the 0.7 Watt as in the Domoicz GUI?

[ben53252642]

Hi,
I don't know Fibaro, but I suppose it sends reports to Domoticz at a time interval or at value changes. If it's so you can create a script_device_<name fibaro module>.lua. In this script you can read the svalue of the device.
Example
Suppose your counter is named fibaroEnergy and it read usage (watts) and energy (kWh)
script_device_fibaroEnergy.lua

Code: Select all

commandArray = {}
local module = "fibaroEnergy"
local reading
local usage, energy
if (devicechanged[module]) then
      reading = devicechanged[module] 
    _,_,usage, energy = string.find(reading, "(.+);(.+)")

   print("Meter "..reading)
   print("Usage: "..usage.."watts")
   print("Energy: "..energy.."wh")

end

Print sentence is just for seeing the values reports by the device (you can see it in log)
Now you can compare or do anything based on energy or usage values. You can use tonumber(energy) to convert string energy into a number (for comparison or calculate).
Will this is useful for you?.
Bye

Thanks for posting this, I've modified my washing machine script to get watts from a kWh sensor instead of the dedicated watts sensor.

Code: Select all

commandArray = {}
local module = "Washing Machine / Dryer kWh"
local reading
local wattvalue
if (devicechanged[module]) then
      reading = devicechanged[module] 
    _,_,wattvalue = string.find(reading, "(.+);(.+)")
    wattvalue = tonumber(wattvalue)

if (uservariables["WashingMachineState"] == 'notinuse' and wattvalue >= 10 ) then
commandArray['Variable:WashingMachineState'] = 'inuse'
end

if (uservariables["WashingMachineState"] == 'inuse' and wattvalue <= 1 ) then
commandArray['Variable:WashingMachineState'] = 'notinuse'
commandArray['SendNotification']='Domoticz#The washing machine has finished.'
end    
end

return commandArray