Alert when string value doesn't change for specific time period

[ahahum]

I have a windows box that I'm trying to monitor a directory on to see when the last update to a file in the directory. I have a powershell script running that sends the last updated time of the most recent file to Zabbix using zabbix_sender. This is working fine and I see the values updating as they should.

I don't know how to trigger on my condition properly. I need to trigger an alert when the value has not changed in x amount of time. I think this is possible, but I'm not too advanced on making triggers like this. Any help would be appreciated.

Cheers!

[LenR]

If the string value is a "always increasing" date string, then it will never have the same value twice when it does change. In that case, then something like item.last(xm) = item.last() maybe

[Semiadmin]

I think in this case would be better convert time to unixtime in PS script and save it as an integer with unixtime as units.

[ahahum]

Good feedback, thank you both.

I have the values being entered as unixtime now and that should help achieve what I want

I tried the one from LenR but it isn't clearing when the value changes. I'm trying out some recovery expressions, but I would've expected it to clear when the latest value does not match that of 2h ago according to my current trigger.

[Markku]

How about

item.last() = item.last(,2h) (note the syntax, see https://www.zabbix.com/documentation...s?s%5B%5D=last)

or

item.min(2h) = item.max(2h)

Markku

[ahahum]

How about

item.last() = item.last(,2h) (note the syntax, see https://www.zabbix.com/documentation...s?s%5B%5D=last)

or

item.min(2h) = item.max(2h)

Markku

Ah yes, that makes perfect sense and seems to be working. Thanks for your help, everyone!