When we setup a trigger based on a GPI input, its either ON or OFF.In some cases it would be interesting to use a Change of state as a trigger, explanation :
For example I want to turn on a light with both a real life switch and cayenne, my real life switch will trigger a GPI on my board. Then, i set a trigger to rise the appropriate GPO for my relay to turn on my light. Likewise, I can just activate my GPO in cayenne and lights goes up, but my real life button will not move.
But if i turn on my light IRL, and off with cayenne, my real life switcher is still up, so I have to make the switch down and up to start the light again. Or if i could make a trigger that is set to Change of State instead of ON or OFF, I just flip the switch once and bob is your uncle ! Cleaner and prettier way !
(would also be possible to make this happen inside the board, without using cayenne, but thats sneakier)
What do you think ?