# MQTT some topics work, others don't?

**URL:** <https://community.homey.app/t/mqtt-some-topics-work-others-dont/141978>\
**Category:** Questions & Help\
**Created:** [August 20, 2025, 5:58pm UTC](https://community.homey.app/t/mqtt-some-topics-work-others-dont/141978 "2025-08-20T17:58:35Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Arjan\_Neet](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/arjan_neet/32/17808_2.png) [@Arjan\_Neet](https://community.homey.app/u/Arjan_Neet)\
**Post date:** [August 20, 2025, 5:58pm UTC](https://community.homey.app/t/mqtt-some-topics-work-others-dont/141978/1 "2025-08-20T17:58:35Z")

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I’m using a MQTT broker on my Synology and a MQTT client in Homey to receive the messages from my Ajax alarm which works fine, but now I also activated MQTT in my Nuki lock, but for some reason I do not get any triggers in Homey for that.

If I look inside MQTT explorer I see the messages, but in Homey nothing happens, am I forgetting something??

message from Ajax:

![image](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/a/9/a967a48ddc2d1a40c8aa1e9bf06eb95cf8635217.png)

Trigger in homey works fine:

 ![image](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/9/1/9120efbad9b7f7df1558f7da6ed257fe50ca6de1.png)

Message from Nuki:

 ![image](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/4/b/4bd078361b503af728b0736a0a187df5580c7c59.png)

Neither flow in homey does anything:

 ![image](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/a/0/a0ee1846b07ace9116177cbbbfefeb233e6e894b.png)

![image](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/e/1/e163f22ab46c2542aaa5f79b3f334029c9ed43f6.png)

I already restarted the homey mqtt client but that doesn’t make any difference…

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**Author:** ![robertklep](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/robertklep/32/160628_2.png) [@robertklep](https://community.homey.app/u/robertklep)\
**Post date:** [August 20, 2025, 6:06pm UTC](https://community.homey.app/t/mqtt-some-topics-work-others-dont/141978/2 "2025-08-20T18:06:14Z")

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“nuki” isn’t a topic, `nuki/45XXX/timestamp` is a topic.

If you want to prefix-match a topic, use `nuki/#` or `nuki/45XXX/#`

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<div class="post-metadata">

**Author:** ![Arjan\_Neet](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/arjan_neet/32/17808_2.png) [@Arjan\_Neet](https://community.homey.app/u/Arjan_Neet)\
**Post date:** [August 20, 2025, 6:18pm UTC](https://community.homey.app/t/mqtt-some-topics-work-others-dont/141978/3 "2025-08-20T18:18:55Z")

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Thanks a lot Robert! Now it works, I don’t have that much experience with mqtt yet, the alarm message has the topic ‘on’ behind the arrow, and that is the topic I use and worked, so I thought because the serial number from Nuki was also next to the arrow, that was the topic I had to use and then filter the rest out of the message.

But now I use the state topic and receive all correctly 🙂