Node Red would depend on what it is using to commuicate.
Iobroker sends the same command to multiple devices its not the same as an announcement (kind like the difference between playing music in a group - and asking each device to play the same song).
It is not much more efficient then creating a flow called ‘announce everywhere’ and running an announcement upon all devices based upon a variable… But ill consider adding this in the code. Just be careful though - you can get rate limited if you send to many commands to quickly …
@tembelreis the link is not working anymore, I think because of @Jamie submitting a new version for public release. I suppose the latest version will be available soon in the normal appstore now.
I added it to Alexa … as there is a skill for it. Then using my app in homey I added a new Alexa “smart plug”. So it can now be controlled in homey or by flows directly. With out the need for a someone to create a homey app for this specific device.