# Alarm if there is no node red signal

**URL:** https://discourse.nodered.org/t/alarm-if-there-is-no-node-red-signal/77996
**Category:** General
**Tags:** function-node
**Created:** [28 April 2023 08:12 UTC](https://discourse.nodered.org/t/alarm-if-there-is-no-node-red-signal/77996 "2023-04-28T08:12:44Z")
**Posts on this page:** 4
**Page:** 1

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### Author: ![Tomi](https://avatars.discourse-cdn.com/v4/letter/t/f4b2a3/32.png) [@Tomi](https://discourse.nodered.org/u/Tomi)
#### Post date: [28 April 2023 08:12 UTC](https://discourse.nodered.org/t/alarm-if-there-is-no-node-red-signal/77996/1 "2023-04-28T08:12:44Z")

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The PR55-61E sensor is being used  
I'm using Node Red  
If there's no signal for six minutes, the alarm goes off  
Can you set it up I looked up the homepage and website, but I don't know If you can solve the problem  
Thank you.

 ![20230428](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/8/1/81e4178abc3c63efb57f3c7de56ed6a28945e3c9.png)

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### Author: ![jbudd](https://avatars.discourse-cdn.com/v4/letter/j/5f8ce5/32.png) [@jbudd](https://discourse.nodered.org/u/jbudd)
#### Post date: [28 April 2023 08:36 UTC](https://discourse.nodered.org/t/alarm-if-there-is-no-node-red-signal/77996/2 "2023-04-28T08:36:20Z")

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What you want is the Trigger node.  
Set it to

- Send nothing
- Wait 6 minutes then send Alarm
- Extend delay if new message arrives.  
 ![Untitled 2](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/a/0/a05ab2eaa0b1af65999b3afa4c07f0f210499564.jpeg)

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### Author: ![Tomi](https://avatars.discourse-cdn.com/v4/letter/t/f4b2a3/32.png) [@Tomi](https://discourse.nodered.org/u/Tomi)
#### Post date: [28 April 2023 08:37 UTC](https://discourse.nodered.org/t/alarm-if-there-is-no-node-red-signal/77996/3 "2023-04-28T08:37:37Z")

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Thank you. I'll try it.  
If it doesn't go well, I'll reply again.

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### Author: ![system](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/1X/d073cd938eafa2e558d7c2cd59003b3ef4963033.png) [@system](https://discourse.nodered.org/u/system)
#### Post date: [27 June 2023 08:37 UTC](https://discourse.nodered.org/t/alarm-if-there-is-no-node-red-signal/77996/4 "2023-06-27T08:37:58Z")

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