Thanks for the response, My "Groups" are not Domoticz groups per say, they are just extra Dummy Light Switches, but they operate the "Group" as defined on the light hub, I prefer to use these groups as the lights are more in-sync than if I operate each light via a script.
The light hub doesn't report a on\off state, or level for the group, only each bulb, and creating a "group" in nodered (I am using that to talk to the hub) is proving difficult.
I created a script to update the group to ON\OFF only when ALL member lights where ON\OFF, and thought this would be OK As the MQTT would only tell the hub to turn to the state it is already in, but this caused some unpredictable behavior, lights turning on\off unexpectedly. So I would like to update the switch but suppress the MQTT message, there was a LUA script (https://www.domoticz.com/forum/viewtopi ... 38&t=19217
) that does something similar, but it didn't really scale to the number of devices I have, so I was hoping to do it via the silent option in dzvents, but even with that on my dummy switch I am still seeing the MQTT message when the dummy switch changes, so it must be outside the event system?