! Skript to copy CO2 value into variable for Arbeitszimmer
! Name of System Variable CO2 value
var sysVarName_1="Wetter-CO2-Arbeitszimmer";
!Name of Hm module
var devName = "Zweiter Arbeitszimmer CO2 CO2:10";

! If exist Systemvariable 1 then sysExist_1 contains the name of the variable else it is NULL 
var sysExist_1=dom.GetObject(ID_SYSTEM_VARIABLES).Get(sysVarName_1); 
! If exist Devicename then devExist contains the name of the device else it is NULL
var devExist=dom.GetObject(devName);

! Check is all three system variables and device exist?
if (sysExist_1 && devExist) 
{
     ! Read state of channel 10
     var readValue=devExist.State();
     sysExist_1.State(readValue);
}