# The best way to notice lack of message?

**URL:** <https://discourse.nodered.org/t/the-best-way-to-notice-lack-of-message/5282>\
**Category:** General\
**Created:** [29 November 2018 01:12 UTC](https://discourse.nodered.org/t/the-best-way-to-notice-lack-of-message/5282 "2018-11-29T01:12:06Z")\
**Posts on this page:** 1\
**Page:** 2

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**Author:** ![Colin](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/colin/32/17040_2.png) [@Colin](https://discourse.nodered.org/u/Colin)\
**Post date:** [2 December 2018 19:43 UTC](https://discourse.nodered.org/t/the-best-way-to-notice-lack-of-message/5282/21 "2018-12-02T19:43:57Z")

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> [@Werner](#):
>
> never heard of LWT

See [What is MQTT Last Will and Testament (LWT)? – MQTT Essentials: Part 9](https://www.hivemq.com/blog/mqtt-essentials-part-9-last-will-and-testament)  
The rest of that series is a good guide to MQTT

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