1) Give a description of the problem
I’ve created a piston that turns a group of lights on and off when a simulated switch is activated.
2) What is the expected behavior?
I would like the simulated switch to turn off when I turn off the lights manually (or with another piston)
3) What is happening/not happening?
I think due to some sort of race condition, the lights turn on and then immediately off.
4) Post a Green Snapshot of the piston
So what am I doing wrong?
You could try doing something like to simplify the on and off.
On events from {metaSwitch} switch
Using {lightSet}
set switch to {metaSwitch}
End on event
Then to keep them in sync when turning them off
If any of {lightSet} switch changes to off
And
{metaSwitch} is on
Then
Using {metaSwitch}
Turn off
End if
Wow, your simplification is pretty sweet!
However, its running into the same issue. Lights turn on, then immediately off. I’m assuming its because for a brief moment, the metaSwitch is on and the lightSet is off? I thought about putting some sort of timer in there, but that seems like a hack.
In the second condition you can change
and
{metaSwitch} is on
To
and
{metaSwitch} was on for at least xx seconds
Find the sweet spot so that it doesn’t run into the race condition
Hey, i have a similar set up. Can you please share how many seconds you used? im still having some issues i think i might need to create a new topic in the design piston help 
thanks
No one would be able to use your template because you shared the one that says do not share on it.
I know there’s already a solution for this post, but just giving my 2 cents. As much as I love using pistons for everything, there’s actually already a SmartApp available that works awesome for this, so why reinvent the wheel.
It’s called TrendSetter. I have it set up for a few spots on my house.
You set up a new device in the app and it auto creates the virtual device for you (the smart app also comes with a few virtual device handlers you have to install). And it does all the things you’re asking for and more.
Personally, I had a couple occasions where I didn’t know which smartapp was doing something that I didn’t want it to do. Took me way longer to track down then I wanted it to. So for that reason alone, I’d much rather have all my automations in one place, webcore.
How do you get the “On Events From” trigger? I’ve been looking all over and haven’t found anything.
