Can I check how many days a device has been on?

[DC]

I need to know when a device has been on for x days. Is that possible to do with a script?

Specifically, what I want to do is turn my sprinkler system rain delay off after it's been on for three days. If I want to reset it for another three days, I'll just turn it off and then back on. What I'm trying to avoid is forgetting that it's on.

Thanks.

[Michael McSharry]

<pre class="ip-ubbcode-code-pre">

if hs.isOn(sprinklerDelay) Then
if datediff("d",hs.DeviceLastChange(sprinklerDelay),now) &gt; 3 Then
'do what you want
end if
end if

' use "h" and (3 * 24) or "n" and (3* 24 * 60) for better resolution</pre>

[DC]

Michael,

How is "datediff" calculated? Does it change at midnight each night or does it change every 24 hours? For example, if the device is turned on at 23:00, will it show it's been on for one day at 00:01, or will it be 23:00 the next day before it shows it's been on one day?

Thanks for the help.