Countdown Timer - Universal Devices ISY-994i User Manual

11.10.3 Countdown Timer

When it's hot, I like to go to sleep with the whole house fan on. But there are nights I want it
to stay on for a long time, and others when I want it on for just a bit.
My need is to control a whole-house fan.
Here's what a user can do;
• Turn a responder on, off or dim as usual using any KeyPadLinc or SwitchLinc button.
• Put the responder in timer mode by double-tapping the button.
• Increase the remaining time by double-tapping multiple times.
You will see below that the minutes remaining has been hard coded as 30 (in [Fan
Increment], Then section). However, this could be replaced with a variable so it could be
altered via the web or MobiLinc interface.
In my example, I'm watching two switches, one upstairs and one downstairs. Whether the
fan is currently on or off, a double tap (from either location) turns it on and starts the timer
decrementing. When the decrementing code times out, the fan is turned off.
Note that to detect button presses, individual devices must be checked. But for proper
display status (if you have multiple controls linked), a scene must be used to ensure that all
responders display the correct status.
A single variable, "Fan_Minutes" describes the remaining time on the counter.
Page | 331