Store time to an item when presence was detected

[halloween]

Hi,
my KNX-Sensor for presence sends “on” to a switch in openhab. Some time ago i saw a rule, which stored the time of last presence detection to an item and showed this on the sitemap. But now i can´t find it anymore.

With habmin i can see, when presence was detected during a time period. But how can i store the time to an item and show it on the sitemap?

Do you have any other suggestions what i can do with this presence item? Show some statistics or something like that?

[MikeH]

Was this it:

Set last tripped/alarm date, or last action date to an item - best practice?

Hi together, maybe this is a ridiculous question, but I have some contacts and motion sensors installed and I’m thinking about the best practice for setting the last “alarm” date to an Item. I found this topic, what is describing how to update the last value to an Item, but does not provide the rule trigger or something similar: How to assign lastUpdate to an item? What do you think is the best practice to set the last update? rule with time cron every xx minute? rule for each sensor/contac…