I seem to have answered my own question: LUA is case sensitive. hence dzVents is also case sensitive.
This means that the statement above must be correctly written as:

Here is the whole script, in case you wonder:
return {

on = { devices = { 'ZW-Deur_1' } },

logging = { level = domoticz.LOG_INFO, marker = "reset-alarm"} ,

execute = function(dz, device)

local siren = 'Siren Alarm'

if (device.state == 'Off') and (dz.devices(siren).state == 'On') then
dz.log ...

Hi, I am getting this error when using AfterSec(10) in a dzVents scripts execute section

dz.devices('Siren Alarm').switchOff().AfterSec(10)

Error: attempt to call a nil value

The script works perfectly fine when I remove the option 'AfterSec(10)'
The device here is a coolcam siren, which I ...

Hi,

How to make this siren work with Domoticz? Help would be appreciated.

Neo Coolcam Alarm Siren. This device has no model number on the box, instructions or body.
It included/paired just fine with Aeotec z-wawe stick, and it is visible in OpenZWave.
OZW control panel allows me to configure and ...