# Node-red and air purifier 3h

**URL:** <https://discourse.nodered.org/t/node-red-and-air-purifier-3h/39889>\
**Category:** Developing Nodes\
**Created:** [27 January 2021 18:21 UTC](https://discourse.nodered.org/t/node-red-and-air-purifier-3h/39889 "2021-01-27T18:21:34Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![arybek](https://avatars.discourse-cdn.com/v4/letter/a/97f17d/32.png) [@arybek](https://discourse.nodered.org/u/arybek)\
**Post date:** [27 January 2021 18:21 UTC](https://discourse.nodered.org/t/node-red-and-air-purifier-3h/39889/1 "2021-01-27T18:21:34Z")

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For several days I have been trying to program mi air purifier 3h in node-red. Almost everything works, the only annoying thing is that every minute the device beeps and sets the fan speed to the same - the check condition does not work (if the fan speed is to remain at the same level, do not reset it). Can someone help me?

 ![image](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/d/f/df2a9255e77de9f837cd28af7972459dc667a616.png)

 ![image](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/0/4/04bf8718ab5ca744b6680b006d106c6f457caa89.png)

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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:** [28 March 2021 18:21 UTC](https://discourse.nodered.org/t/node-red-and-air-purifier-3h/39889/2 "2021-03-28T18:21:35Z")

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