dzVents WActual Nil issue

[heggink]

All, I must be thick but I cannot get this power usage actual to work. I have a device (Fridge) of type Usage subtype Electric where I am trying to print its value:

return {
active = true,
on = {
devices = {
'Fridge'
}
},
execute = function(domoticz, dev)
pow = dev.WActual
print('Dev power says ' .. pow)
end
}

Domoticz complains about concatenating a string and a nil value (pow). What am I doing wrong here?

[mivo]

Hi,

try to convert pow value (numeric) to string before print, for example:

Code: Select all

print('Dev power says ' .. tostring(pow))

[dannybloe]

Yes, you have to convert it to a string otherwise lua will complain. Interesting thing here though is why it is nil. You can turn debug logging on and inspect the log. You can also inspect the file domoticzData.lua that will be created in debug mode in /path/to/domoitcz/scripts/dzVents. Or you can do dev.dump() to dump all device attributes to the log.

[heggink]

Found it: it should be WhActual with an h after the W. I followed the wiki so is there a typo? WActual: Number. Current Watt usage.

[dannybloe]

Yup. That's likely a typo.

[heggink]

Yay for the dump() function. That's how I noticed the correct name.

[dannybloe]

I fixed the typo in the docs.