# MQTT5 retained message

**URL:** <https://discourse.nodered.org/t/mqtt5-retained-message/83494>\
**Category:** General\
**Tags:** mqtt\
**Created:** [7 December 2023 11:28 UTC](https://discourse.nodered.org/t/mqtt5-retained-message/83494 "2023-12-07T11:28:03Z")\
**Posts on this page:** 3\
**Page:** 2

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**Author:** ![Lupin\_III](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/lupin_iii/32/67650_2.png) [@Lupin\_III](https://discourse.nodered.org/u/Lupin_III)\
**Post date:** [11 December 2023 09:44 UTC](https://discourse.nodered.org/t/mqtt5-retained-message/83494/22 "2023-12-11T09:44:03Z")

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Thanks for the tip on how to check it. And yes, my recap is then correct. Setting requires string, not number as flushInterval

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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:** [11 December 2023 09:56 UTC](https://discourse.nodered.org/t/mqtt5-retained-message/83494/23 "2023-12-11T09:56:15Z")

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> [@Lupin\_III](#):
>
> Setting requires string, not number as flushInterval

What happened when you provided it as a number?

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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:** [9 February 2024 09:57 UTC](https://discourse.nodered.org/t/mqtt5-retained-message/83494/24 "2024-02-09T09:57:02Z")

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