# Trigger notification on hitting certain temperature values
**URL:** https://discourse.nodered.org/t/trigger-notification-on-hitting-certain-temperature-values/11496
**Category:** General
**Created:** [24 May 2019 09:24 UTC](https://discourse.nodered.org/t/trigger-notification-on-hitting-certain-temperature-values/11496 "2019-05-24T09:24:32Z")
**Posts on this page:** 7
**Page:** 1
### Author:  [@877](https://discourse.nodered.org/u/877)
#### Post date: [24 May 2019 09:24 UTC](https://discourse.nodered.org/t/trigger-notification-on-hitting-certain-temperature-values/11496/1 "2019-05-24T09:24:33Z")
I have a BME280 reading temperature/humidity/pressure and sending the values to my MQTT broker.
As it's monitoring a room where our pets are, and the weather is heating up, I would like a notification on my phone of when the temp hits a certain value. So we do not leave the pets in too hot a room.
I have it working as per below, but it of course notifies every 10 seconds - (when a new MQTT value is sent which is over the threshold).
I would like it so that:
Warning notification sent at 25 degrees - only once
Warning notification sent at 30 degrees - only once
Some kind of buffer would be ideal i.e. as the temperature drops to 24.9 and swings back to 25.0 it does not constantly ping a notification.
Any hints appreciated!
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### Author:  [@dceejay](https://discourse.nodered.org/u/dceejay)
#### Post date: [24 May 2019 09:29 UTC](https://discourse.nodered.org/t/trigger-notification-on-hitting-certain-temperature-values/11496/2 "2019-05-24T09:29:35Z")
look at the RBE node - it has several modes that may help.
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### Author:  [@877](https://discourse.nodered.org/u/877)
#### Post date: [24 May 2019 09:34 UTC](https://discourse.nodered.org/t/trigger-notification-on-hitting-certain-temperature-values/11496/3 "2019-05-24T09:34:58Z")
Hi @dceejay
Thank you, I did look at the RBE node, maybe I need to examine it more closely.
I looked at the deadband mode. I guess I could use a switch to allow the payload through at e.g. 25 degrees, going to RBE node set to **deadband\>block unless change is greater than \> 5** , then it 'should' notify me at 25 degrees and then again at 30 degrees.
But if the value is over 30 degrees won't it keep sending notifications every 10 seconds?
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### Author:  [@dceejay](https://discourse.nodered.org/u/dceejay)
#### Post date: [24 May 2019 09:45 UTC](https://discourse.nodered.org/t/trigger-notification-on-hitting-certain-temperature-values/11496/4 "2019-05-24T09:45:14Z")
not unless it changes by more than 5 degrees while over 30.
or vanilla rbe mode will remove duplicates if steady.
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### Author:  [@877](https://discourse.nodered.org/u/877)
#### Post date: [24 May 2019 09:48 UTC](https://discourse.nodered.org/t/trigger-notification-on-hitting-certain-temperature-values/11496/5 "2019-05-24T09:48:43Z")
Thanks, I will have another look at it 👍
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### Author:  [@877](https://discourse.nodered.org/u/877)
#### Post date: [24 May 2019 17:18 UTC](https://discourse.nodered.org/t/trigger-notification-on-hitting-certain-temperature-values/11496/6 "2019-05-24T17:18:06Z")
Found a good video which explains the nodes in more details for newbies like me 😄
The example flow is very similar in principal to my requirements.
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### Author:  [@Jonathan95](https://discourse.nodered.org/u/Jonathan95)
#### Post date: [1 September 2020 08:37 UTC](https://discourse.nodered.org/t/trigger-notification-on-hitting-certain-temperature-values/11496/7 "2020-09-01T08:37:48Z")
Hey I am not sure if you are still here....
But could you share your node red flow?
I am trying to do something similar and send 2 different emails via
triggers using switch. I mainly want to be able to change the message
after the temperature to reflect where it came from and state.
eg if over this first temperature-sends email or alert that stating temperature
with message saying please check deep freeze. then if temperature worsens
I want to send an additional email or alert with the temperature per degree C
stating that need to call the refrigeration tech.
We have been having trouble with our deepfreez and had spoiled a bunch of our food cause of this.
Really cant afford to have it happen again but we also arent able to buy a new deepfreezer .
So this was just the best I could come up with.
Please if anyone else could help I would gladly appreciate it.