how to check positive numbers in dzvents-script

[pgas37]

Domoticz v 3.8153
Raspberrypi v3

Hallo.

in a dzvents-script i want to check a rise in temperature >3:
if (current) >= vochtpercentage or (delta_5 >= 3) then... ". In this case a rise as well as a drop of temperature with 3 will trigger the THEN

a "+"-sign is not accepted. the same for ():
if (current) >= vochtpercentage or (delta_5 >= +3) then..
if (current) >= vochtpercentage or (delta_5 >= (+3)) then..

I cannot find the right answer.

Please help
thanks
Paul

[emme]

maybe
math.abs(delta_5) >= 3 ?

so you will trigger a +3 difference as well as a -3 difference

[waaren]

Hi Paul,

to help a bigger snippit of your code is needed.

As far as I understand from this line and your description, delta_5 is positive integer or float and therefore it cannot be used for this purpose on its own.

[pgas37]

Emme,
-3 is what i do not want only a positive rise.

Waaren,

I include two parts of the code. The delta_5 is a difference in temperature (degrees) in a 5-minute interval.
Every 5 minutes the current temperature ("current") becomes humidityTmin5 and
the former Tmin5 becomes the Tmin10.
If the rise in temperature in 5 minutes is more then 3degree a fan is activated.
The code sees no difference between +3 and -3, so if the temperature drops more than 3degrees in 5 minutes the fan is also activated. I do
not want that to happen.

hope you can help
regards
Paul

==========
--delta =
delta_10 = (current - humidityTmin10)
if PRINT_MODE == true then
print ('Stijging/daling laatste 10 min: ' ..delta_10) --stijging/daling laatste 10 minuten
end
delta_5 = (humidityTmin5 - humidityTmin10) --stijging/daling laatste 5 min
if PRINT_MODE == true then
print ('Stijging/daling laatste 5 min. ' ..delta_5)
end
===================
-- fan (de)activeren
if (current) >= vochtpercentage or (delta_5 >= 3) then
domoticz.devices(vent_schakelaar).switchOn()
if Off_timer == 2 then
domoticz.notify('ventilator aan (>61%)', ' vochtpercentage en delta_t5 : ' ..current ..delta_5, domoticz.PRIORITY_LOW)
end
===================

[pgas37]

mistake:
read temperature = humidity

paul

[waaren]

Hi Paul,

are you sure that the fan is triggered by the (delta_5 >= 3) part of the expression and not by the (current) >= vochtpercentage part ?

Code: Select all

print ("1.   true  expected: " .. tostring ( 4 >= 3) )
print ("2.   true  expected: " .. tostring ( 3 >= 3) )
print ("3.   false expected: " .. tostring ( 2 >= 3) )
print ("4.   false expected: " .. tostring ( 0 >= 3) )
print ("5.   false expected: " .. tostring ( -1 >= 3) )
print ("6.   false expected: " .. tostring ( -3 >= 3) )
print ("7.   false expected: " .. tostring ( -4 >= 3) )
print ("8.   false expected: " .. tostring ( -4.5 >= 3) )
print ("9.   true  expected: " .. tostring (  4.5 >= 3) )

give:

2018-01-10 01:00:47.190  dzVents: 1.   true  expected: true
2018-01-10 01:00:47.190  dzVents: 2.   true  expected: true
2018-01-10 01:00:47.190  dzVents: 3.   false expected: false
2018-01-10 01:00:47.191  dzVents: 4.   false expected: false
2018-01-10 01:00:47.191  dzVents: 5.   false expected: false
2018-01-10 01:00:47.192  dzVents: 6.   false expected: false
2018-01-10 01:00:47.192  dzVents: 7.   false expected: false
2018-01-10 01:00:47.192  dzVents: 8.   false expected: false
2018-01-10 01:00:47.192  dzVents: 9.   true  expected: true

I simplified the script that I original copied from https://www.domoticz.com/wiki/Humidity_control because this is all I need to get my bathroom dry after a shower

Code: Select all

 --[[ ************************************************************************************
*** Filename         : /opt/domoticz/scripts/dzVents/scripts/Bathroom humidity.lua
*** Initial Date     : 14 january 2017                                                   
*** Initial Designer : xxxxxxxx  
*** Use of this file : dzVents script (LUA) to check if ventilator needs to start in bathroom
*** Active on system : Domoticz   
*****************************************************************************************
***           Modification History List                         
***           -------------------------                     
*** modified by      : xxxxxxxxxx    date: 14/09/2017                                 
*** modified         : Modified for dzvents 2.2 syntax, +debug +location
***
*** modified by      : xxxxxxxxxx    date: 5/11/2017
*** modified         : Introduced repeatAfterSec to avoid missed signals to 4.33 Mhz switch
***
************************************************************************************** ]]-- 
return {
	active = true,
    
    on = { 
        timer = { 'every minute' }
        },
    
    data = {
		HumidityBefore = { initial = 65 }
           },
    

    execute = function(domoticz)
       local debug = false
        
        function debug_print(MyLine)
            if debug then print(MyLine) end
        end
        

        
        local Humidity = domoticz.devices("Badkamer (Zwave)").humidity
        local Vent = domoticz.devices('Centrale afzuiging')
        
        if ( Humidity == 0 or Humidity == nil) then
            print("dzVents: Bathroom Humidity: current is 0 or nil. Skipping this reading")			
        else
            
            if ( Humidity ~= domoticz.data.HumidityBefore ) then
                debug_print ("dzVents: Bathroom Humidity: " .. tostring(Humidity)  .. "  domoticz.data.HumidityBefore: " .. tostring(domoticz.data.HumidityBefore ))    
                local StartNeeded = ( ( Humidity > domoticz.data.HumidityBefore + 3 )  and ( Vent.state == 'Off' ) )  
                
                if StartNeeded then
                    print ("dzVents: Bathroom Humidity:  Fan off ==>> Switching fan on for 20 minutes")
                    Vent.switchOn().repeatAfterSec(10,5) -- Repeat command 5 times (after 10,20,30,40 and 50 seconds)
                    Vent.switchOff().afterMin(20).repeatAfterSec(10,5)					
                end
                domoticz.data.HumidityBefore = Humidity
			end
        end
	end
}

[pgas37]

I know for sure. I tested it with:
"if (delta_5 >= 3) then
domoticz.devices(vent_schakelaar).switchOn()" and the fan switched on.

I will go into your script, but i still need an answer how to exclude a drop in humidity

regards
Paul

[pgas37]

I tried your script. Local Humidity en Vent changed.
Fan started....
an error in line 53 (switch-on of the Fan) : 2018-01-10 16:14:00.198 Error: dzVents: Error: ...cz/scripts/dzVents/generated_scripts/VochtVentVtest3.lua:53: attempt to call field 'repeatAfterSec' (a nil value)/

because of that probably the switch-off after 20 minutes did not work either. Suggestions?

I use dzventz 2.2.00 and domoticz 3.8153.

regards
Paul

[waaren]

@Paul,

I am really puzzled by this. Could you please insert the function

Code: Select all

  
function ValueAndTypeCheck(Var2Check)
    print("---------------")
    print("Var2Check value:  " .. tostring(Var2Check) )
    Var2Check_Type = type(Var2Check)
    print("Var2Check type:   " .. Var2Check_Type )
    if Var2Check_Type ~= "string" then
        print (tostring(Var2Check) .. " >= 3 is " .. tostring((Var2Check >= 3)))
        if Var2Check > 0 then 
            print ("Var2Check is positive")
        elseif Var2Check < 0 then 
            print ("Var2Check is negative")
        else 
            print ("Var2Check is zero")
        end
    else
        print("no further checks possible on Var2Check")
    end    
    print("---------------")
end

somewhere in the beginning of your code and call it with ValueAndTypeCheck(delta_5) just before your existing code "if (delta_5 >= 3) then" ?

[waaren]

@Paul,

my fault: repeatAfterSec is only available starting dzVents version 2.3
you must remove the .repeatAfterSec(10,5) part for dzVents version 2.2

[pgas37]

How can i download v 2.3 in domoticz?

[pgas37]

Waaren,


I inserted your code in to the top of the script and
just before "if (delta_5) >3 then..." I inserted "ValueAndTypeCheck(delta_5)".


a part of the log-file (drop 2 degrees) :
2018-01-10 22:39:00.285 dzVents: T-5: Digoo_ch1: 82
2018-01-10 22:39:00.285 dzVents: T-10: Digoo_ch1: 84
2018-01-10 22:39:00.286 dzVents: Stijging/daling laatste 10 min: -4
2018-01-10 22:39:00.286 dzVents: Stijging/daling laatste 5 min. -2
2018-01-10 22:39:00.286 dzVents: ---------------
2018-01-10 22:39:00.286 dzVents: Var2Check value: -2
2018-01-10 22:39:00.286 dzVents: Var2Check type: number
2018-01-10 22:39:00.286 dzVents: -2 >= 3 is false
2018-01-10 22:39:00.286 dzVents: Var2Check is negative
2018-01-10 22:39:00.287 dzVents: ---------------

and
(rise 7 degrees)
2018-01-10 22:53:00.222 dzVents: T-5: Digoo_ch1: 84
2018-01-10 22:53:00.222 dzVents: T-10: Digoo_ch1: 77
2018-01-10 22:53:00.223 dzVents: Stijging/daling laatste 10 min: 7
2018-01-10 22:53:00.223 dzVents: Stijging/daling laatste 5 min. 7
2018-01-10 22:53:00.223 dzVents: ---------------
2018-01-10 22:53:00.223 dzVents: Var2Check value: 7
2018-01-10 22:53:00.223 dzVents: Var2Check type: number
2018-01-10 22:53:00.223 dzVents: 7 >= 3 is true
2018-01-10 22:53:00.224 dzVents: Var2Check is positive
2018-01-10 22:53:00.224 dzVents: ---------------

[waaren]

@Paul,
dzVents 2.3 is part of Domoticz Beta. I don't think you can install it separately on top of domoticz 3.8153
I am running out of ideas why your code reacts unexpected to a negative value. I sent you a PM on how to progress this

[dannybloe]

Indeed, don't move dzVents runtime files around installs as it is tightly coupled to the Domoticz code. Therefore 2.3.0 can only be used with the current beta and not with stable.