Alarm if there is no node red signal

[Tomi]

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.

[jbudd]

What you want is the Trigger node.
Set it to

• Send nothing
• Wait 6 minutes then send Alarm
• Extend delay if new message arrives.
  
  

[Tomi]

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