Check if action happen in under 0.5 secs

[stephen_nutt]

See if the logic helps:

Has Anyone Setup a Single and Double-Tap Rule for a Button?

That is a problem then, you would have to detected the first tap with Rule Machine, then do a wait until "tap" which is the second tap, in the actions section. Don't forget the timeout waiting for the second tap. But be aware that this will negate any single taps of the button unless you put additional logic into the actions.