# How to spot a static change properly? (noob question)
**URL:** https://discourse.nodered.org/t/how-to-spot-a-static-change-properly-noob-question/75313
**Category:** General
**Tags:** function-node
**Created:** [16 February 2023 20:28 UTC](https://discourse.nodered.org/t/how-to-spot-a-static-change-properly-noob-question/75313 "2023-02-16T20:28:41Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@AndKe](https://discourse.nodered.org/u/AndKe)
#### Post date: [16 February 2023 20:28 UTC](https://discourse.nodered.org/t/how-to-spot-a-static-change-properly-noob-question/75313/1 "2023-02-16T20:28:41Z")
for a number of Zigbee devices, I check if the device is offline, if offline - send a notification.
My method today is:
The "problem" is that I really would like the logic to be for each device:
if (offline\_time \> 24h) then notify.
I guess the answer is not to duplicate the function node for each element and program the logic into it like I did?
if there another node I should use that can do the:
if (msg.payload === "offline" and its\_bee\_offline\_for \> 24h) then ....
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### Author:  [@TotallyInformation](https://discourse.nodered.org/u/TotallyInformation)
#### Post date: [16 February 2023 21:35 UTC](https://discourse.nodered.org/t/how-to-spot-a-static-change-properly-noob-question/75313/2 "2023-02-16T21:35:47Z")
I think that this is what you want?
~~Just not quite certain it will handle things in the right order without trying.~~ OK, just tested and it does indeed do exactly what you want.
Also, you may not need multiple MQTT inputs, you may be able to use wildcards.
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### Author:  [@AndKe](https://discourse.nodered.org/u/AndKe)
#### Post date: [17 February 2023 21:44 UTC](https://discourse.nodered.org/t/how-to-spot-a-static-change-properly-noob-question/75313/3 "2023-02-17T21:44:06Z")
It seems this "trigger node" must be insterted after my "function node"?
- or can my "function node" somehow be simplified/moved into something simpler?
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### Author:  [@TotallyInformation](https://discourse.nodered.org/u/TotallyInformation)
#### Post date: [17 February 2023 22:03 UTC](https://discourse.nodered.org/t/how-to-spot-a-static-change-properly-noob-question/75313/4 "2023-02-17T22:03:26Z")
No, I don't believe you need a function node at all. The trigger node does everything.
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### Author:  [@AndKe](https://discourse.nodered.org/u/AndKe)
#### Post date: [17 February 2023 23:08 UTC](https://discourse.nodered.org/t/how-to-spot-a-static-change-properly-noob-question/75313/5 "2023-02-17T23:08:54Z")
Thank you
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### Author:  [@system](https://discourse.nodered.org/u/system)
#### Post date: [3 March 2023 23:09 UTC](https://discourse.nodered.org/t/how-to-spot-a-static-change-properly-noob-question/75313/6 "2023-03-03T23:09:00Z")
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