Maybe it's a bit late, but here's what works for me to parse the OpenZwave log from a domoticz lua script and log the tag number. You will need to change the Node003 part of the expression, probably need to change the openzwave log file location and check if your log lines follow the same format ...

Hi all, I'm trying to set a user variable from a dzVents script (so that another script can trigger on it). I think it is failing because I start domoticz with the -webroot option: -daemon -www 8081 -sslwww 0 -log /var/log/domoticz/log.txt -webroot domoticz -verbose 2 -pidfile $PIDFILE -userdata ...