dzVents adding a new user variable from script

[FarFarAway]

Hi folks,

I'm pretty new to Domoticz, installed it 2 days ago, and experimenting with event scripts.
I baked my own led driver hardware where I can plug on a atmega328p, or now also an esp01 controlling the light with an enable and a pwm pin.
Works pretty good using ESPeasy self compiled on the esp01 and a quite static script in Domoticz.
I want my lights to dim up and down when turning them on/off and can achieve this already.
To properly calculate the dim time (fixed parameter to curl call for ESPeasy) I need also the old value of the dimmer setting and thought I store that in user variables.

Where I'm failing is to create a non existing user variable from the dzVent LUA script.
I tried to call the json command from the script using os.execute and openURL, but no effect.

Can somebody give me a hint how to achieve creation of a new user variable from a dzVents event script, please?

Cheers,
Klaus

[StephaneM60]

Hi,

You won't need to create a user variable (unless you have to use it oustide of dzvents), instead you want to use a global or local dzvents data.

Local dzvents data : if this variable is to be used in the same script (and for every trigger of the script)
Global dzvents data : if the variable is to be used in multiple dzvents scripts

local data :

Code: Select all

    return {
        on = {
            devices = { 'MySwitch' }
        },
        data = {
            counter = { initial = 0 }
        },
        execute = function(domoticz, switch)
            if (domoticz.data.counter == 5) then
            domoticz.notify('The switch was pressed 5 times!')
            domoticz.data.counter = 0 -- reset the counter
        else
            domoticz.data.counter = domoticz.data.counter + 1
        end
    end
    }

global data are defined in globa_data.lua

Code: Select all

return {
        helpers = {},
        data = {
            heatingProgramActive = { initial = false }
        }
    }

and then be used like this in other dzvents scripts

Code: Select all

    return {
        on = {
            devices = {'WindowSensor'}
        },
        execute = function(domoticz, windowSensor)
            if (domoticz.globalData.heatingProgramActive
                and windowSensor.state == 'Open') then
                domoticz.notify("Hey don't open the window when the heating is on!")
            end
        end
    }

Based on what you want, I would create a local data, specifically an array, that will contain the current level of the dimmer.

Then create a dzvents script that will trigger for all your lights (using your led driver) and catch the level change, store the value in the global data (if you use an array match idx with level in your array)

Then in the same script you can catch the on/off and do your thing to dim the light.

Otherwise to create a user variable in dzvents, I would use the openURL function of dzvents domoticz object with the JSON API : /json.htm?type=command&param=adduservariable&vname=USERVARIABLENAME&vtype=USERVARIABLETYPE&vvalue=USERVARIABLEVALUE...