# Get notified when I don t receive mqtt messages anymore

**URL:** <https://discourse.nodered.org/t/get-notified-when-i-don-t-receive-mqtt-messages-anymore/6165>\
**Category:** General\
**Created:** [27 December 2018 15:03 UTC](https://discourse.nodered.org/t/get-notified-when-i-don-t-receive-mqtt-messages-anymore/6165 "2018-12-27T15:03:37Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![ukmoose](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/ukmoose/32/13_2.png) [@ukmoose](https://discourse.nodered.org/u/ukmoose)\
**Post date:** [27 December 2018 15:07 UTC](https://discourse.nodered.org/t/get-notified-when-i-don-t-receive-mqtt-messages-anymore/6165/2 "2018-12-27T15:07:32Z")

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The topmost thread when you posted this asks the same question and contains all the answers...

> [@How can I get feedback from MQTT](https://discourse.nodered.org/t/how-can-i-get-feedback-from-mqtt/6130):
>
> Hi, I'm creating my first project. I want to control the start of my boiler. The system is very simple, an ESP32 reads the temperature and sends it once a minute to mosquito on a raspberry, node-red reads the temperature and commands the boiler. I realized that there might be a problem. If the boiler is on and the ESP32 board no longer sends the temperature, the boiler will never turn off. How can I tell with node-red if the sensor is still working? Thank you

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