I use the “dim with me” smart app and it works very well for some lights I have in a ceiling fan. I set up one to follow the other and they both turn off when I turn the lead bulk off, or turn on when I turn the lead bulk on.
If I understand the first post correctly, the OP is looking for a single device option which will toggle on or off, such that if it is on it will turn off and if it is off it will turn on. That’s so they only have to use one IFTTT applet.
I’m sure webcore could do this with a virtual device, but the set up would be fairly complicated if you aren’t already using webcore.
But on their own, The smartapps that do grouping like dim and dimmer or trendsetter won’t give you the toggle feature.
Bumping this thread from the past. Are there any new updates on this? I have two groups one for my outside lights and one for my basement that are all lohas led smart bulbs on wifi. I got the virtual switch to work in smart things and i see all of my wifi devices but i do not see the groups. Is there a solution to this or do I have to make an individual switch for each bulb cringe I also have IFTTT setup and see the wifi devices but not the groups.