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Comparing two float variables in dzVents
Posted: Friday 27 October 2017 21:51
by arkoko
Hi!
I need to compare two float variable with different round. For example values 18 and 21.50. Direct comparing does not work:
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if (myCurrSetPoint ~= domoticz.variables('NightTemp').value)
I found workaround to get it working:
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if (myCurrSetPoint*100 ~= domoticz.variables('NightTemp').value*100)
But i doubt that this is optimal solution. Does more elegant way exists in dzVents script?
Re: Comparing two float variables in dzVents
Posted: Sunday 29 October 2017 12:24
by dannybloe
That's not a dzVents thingy but a Lua thingy I'm affraid. I guess rounding is the best way as floats in Lua are a bit weird to compare indeed. You can use
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if domoticz.round(myCurrentSetPoint, 1) ~- domoticz.round(domoticz.variables('NightTemp').value, 1) then
But I'm not sure if that works.
Re: Comparing two float variables in dzVents
Posted: Tuesday 31 October 2017 11:43
by arkoko
Thank you for your help. I assume that in your code ~- shoul be as ~=, but with
if it didn't work:
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if ((domoticz.round(myCurrentSetPoint, 1)) ~= (domoticz.round(domoticz.variables('NightTemp').value, 1))) then
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2017-10-31 12:31:00.307 Error: dzVents: Error: An error occured when calling event handler round_test
2017-10-31 12:31:00.307 Error: dzVents: Error: ...z/var/scripts/dzVents/../../dzVents/runtime/Domoticz.lua:243: attempt to perform arithmetic on local 'x' (a nil value)
Writing to log seems working:
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domoticz.log('*** Start night SetPoint: ' .. domoticz.round(myCurrSetPoint, 1) .. 'C -> ' .. domoticz.round(domoticz.variables('devolo1NightTemp').value, 1) .. 'C ***')
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2017-10-31 12:20:00.261 dzVents: Info: *** Start night SetPoint: 20C -> 16C ***
Re: Comparing two float variables in dzVents
Posted: Tuesday 31 October 2017 11:54
by dannybloe
Mm.. guess that the value could be nil. You'll have to check it before passing it to the round function.
Re: Comparing two float variables in dzVents
Posted: Tuesday 31 October 2017 12:52
by arkoko
OK, it could, but in my case it's not.
Some details. Code part:
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domoticz.log('*** Original values: ' .. myCurrSetPoint .. ' -> ' .. domoticz.variables('devolo1NightTemp').value .. ' ***')
domoticz.log('*** Rounded values: ' .. domoticz.round(myCurrSetPoint, 1) .. ' -> ' .. domoticz.round(domoticz.variables('devolo1NightTemp').value, 1) .. ' ***')
if ((domoticz.round(myCurrentSetPoint, 1)) ~= (domoticz.round(domoticz.variables('NightTemp').value, 1))) then
And log:
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2017-10-31 13:48:00.339 dzVents: Info: ------ Start internal script: round_test:, trigger: at 13:48
2017-10-31 13:48:00.364 dzVents: Info: *** Original values: 20.00 -> 16.1 ***
2017-10-31 13:48:00.364 dzVents: Info: *** Rounded values: 20 -> 16.1 ***
2017-10-31 13:48:00.365 Error: dzVents: Error: An error occured when calling event handler round_test
2017-10-31 13:48:00.365 Error: dzVents: Error: ...z/var/scripts/dzVents/../../dzVents/runtime/Domoticz.lua:243: attempt to perform arithmetic on local 'x' (a nil value)
2017-10-31 13:48:00.365 dzVents: Info: ------ Finished round_test
Re: Comparing two float variables in dzVents
Posted: Tuesday 31 October 2017 12:59
by dannybloe
devolo1NightTemp ~= NightTemp
It's not the same. Clearly, NightTemp is empty. That x from the error is exactly the value that you pass in the round function.
Re: Comparing two float variables in dzVents
Posted: Tuesday 31 October 2017 13:09
by arkoko
Oeh, I just noticed this typo as well.
Thank you for your effort and sorry for the noise
