I’m trying to run first Javascript rules with my OpenHab. I am running version 2.5.
Below are my two rules used for controlling lighting by presence detectors. I already know how to turn light on/off with presence detector but I am struggling with script which will turn the light OFF only when presence in the room will be OFF for “X” minutes. I have created setTimeout function and it turns light OFF with delay but I do not know how to exit this setTimeout function when the presence will again change to ON while counting already started.
var LGT = getItem("Lgt_TV")
var PSC = getItem("PscJadalnia")
logInfo( "Oświetlenie wyłączy się za 5 sekund");
var t = setTimeout(function(){
sendCommand(LGT, "OFF");
if (PSC == "ON") function (){
clearTimeout(t);
}
}, 5000);
I would use core.actions.js to import ScriptExecution, and then use ScriptExecution.createTimer. You may want to look at the JS Timer example. As a basic rule, whenever possible, use Java or OH classes, interfaces and methods rather than what is available natively in your preferred scripting language.
setTimeout() and setInterval() functions allow you to execute a piece of JavaScript code/function at a certain point in the future. setInterval repeats the call, setTimeout only runs it once.
setTimeout(expression, timeout); runs the code/function once after the timeout. It is a time based code execution method that will execute script only one time when the interval is reached, and not repeat again unless you gear it to loop the script by nesting the setTimeout object inside of the function it calls to run. If geared to loop, it will keep firing at the interval unless you call clearTimeout(). If you want something to happen one time after some seconds Then use setTimeout… because it only executes one time when the interval is reached.
setTimeout(function() {
console.log('Wait 3 seconds and I appear just once');
}, 3000);
setInterval(expression, timeout); runs the code/function repeatedly, with the length of the timeout between each repeat. It is a time interval based code execution method that has the native ability to repeatedly run specified script when the interval is reached. It should not be nested into its callback function by the script author to make it loop, since it loops by default. It will keep firing at the interval unless you call clearInterval(). If you want to loop code for animations or clocks Then use setInterval.
setInterval(function() {
console.log('Every 3 seconds I appear on your console');
}, 3000)