getValue function

[Enic 0]

Hello, fibaro: getValue () asks the device through z-wave instantly or does it obtain the value of a variable stored in HC2?  Thanks.

[SpaceCompany 21]

9 hours ago, Enic said:

Hello, fibaro: getValue () asks the device through z-wave instantly or does it obtain the value of a variable stored in HC2?  Thanks.

It asks the device for the current value.

If you wanna use that value, i advice to store the requested value in field of the variable panel : ( I have created a field with the name "LastWattVaatwasser" first and enter a start value of  "1"

For example :

 

Quote

 

 

-- record the value for the next test
fibaro:setGlobal("LastWattVaatwasser", fibaro:getValue(196, "power")) -- record last use of power
end
setTimeout(tempFunc, 60*1000)
end

-- rules below, make sure the scene starts automatically.
if (sourceTrigger["type"] == "autostart") then
tempFunc()
end

 
 

 

 

 

 

Edited May 24, 2018 by SpaceCompany

[petergebruers 1,268]

I'm sorry, I have to disagree. Devices either report (aka unsolicited report) or you ask them to report by "polling" (global polling, interval polling, manual polling or Lua code to poll).

 

getValue does not poll, it simply returns the last recorded value (it is stored in a database, the database is not visible to the user)...

 

Why are you asking? Is the value returned by getValue not what you expect? That might be normal, it depends on the device and its parameters. For instance, temperature sensors only report if a certain arount of change has occured. This should be in the device's manual, though maybe not very clearly (check parameters).

[Enic 0]

Thanks for answering.
It was to know if the getValue function could saturate the z-wave network, when programming with lua, being a much better database.

[petergebruers 1,268]

3 minutes ago, Enic said:

It was to know if the getValue function could saturate the z-wave network

Ah, excellent question. It is safe to use. Other commands, like "turnOn" do send packets to the device, regardless of state. So it is advised to check if you really need to do a "turnOn" before calling that command. Especially in (fast) loops. The more devices you have, the more care you will have to take with "polling" and "reporting" settings.