trigger expression for sustained condition

[me2017]

Hello! Please help me correct this trigger. I may be overlooking something in the documentation. I want the trigger to execute after a temperature has been >80 for 2 hours. This did not work:

{server001:OutdoorTemperature.last(120m)}>80

I think it's the use of the "last" function that is incorrect. But I don't understand which one would be right.

https://www.zabbix.com/documentation...rs/functions?s[]=function

I also read through this but couldn't find a suitable example:

https://www.zabbix.com/documentation...s/expression?s[]=function

[onallion]

Use "min" instead of "last"

[me2017]

This worked. Thank you. I'm still trying to get my head around the documentation summary of "Lowest value of an item within the defined evaluation period."

[onallion]

Yeah it's a bit hard to understand. For your case it would mean the LOWEST measured temperature in the last two hours was > 80. Therefore you can be sure it has been > 80 for the last two hours.