# Subscribe a MQTT Topic in Ubidots (boolean 1/0) value

**URL:** <https://discourse.nodered.org/t/subscribe-a-mqtt-topic-in-ubidots-boolean-1-0-value/100754>\
**Category:** General\
**Tags:** mqtt-in\
**Created:** [12 April 2026 09:39 UTC](https://discourse.nodered.org/t/subscribe-a-mqtt-topic-in-ubidots-boolean-1-0-value/100754 "2026-04-12T09:39:38Z")\
**Posts on this page:** 8\
**Page:** 1

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**Author:** ![Zulpaedi](https://avatars.discourse-cdn.com/v4/letter/z/db5fbb/32.png) [@Zulpaedi](https://discourse.nodered.org/u/Zulpaedi)\
**Post date:** [12 April 2026 09:39 UTC](https://discourse.nodered.org/t/subscribe-a-mqtt-topic-in-ubidots-boolean-1-0-value/100754/1 "2026-04-12T09:39:38Z")

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Dear All,

I have a problem with a MQTT subscribe on Node-RED either by using mqtt\_in node or ubidots\_in node. The connection to MQTT broker has successfull, however there is no output from the node. The expected output is boolean 1/0 value.  
Appreciate if idea to solve this issue.

Best Regards,  
Zulpaedi

 ![Connected](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/7/5/759b5214537a4f0108ae7b883ffa7163f14c82f6.jpeg)  
 ![MQTT node](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/a/9/a9f8c1538095c5b11655b2774e2695003e93dc5b.jpeg)

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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:** [12 April 2026 09:58 UTC](https://discourse.nodered.org/t/subscribe-a-mqtt-topic-in-ubidots-boolean-1-0-value/100754/2 "2026-04-12T09:58:19Z")

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Are you sure there is a / on the front of the topic?

Alternatively install mqttexplorer on your pc then you can easily see all the topics being published.

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**Author:** ![Zulpaedi](https://avatars.discourse-cdn.com/v4/letter/z/db5fbb/32.png) [@Zulpaedi](https://discourse.nodered.org/u/Zulpaedi)\
**Post date:** [12 April 2026 11:30 UTC](https://discourse.nodered.org/t/subscribe-a-mqtt-topic-in-ubidots-boolean-1-0-value/100754/3 "2026-04-12T11:30:55Z")

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Hi Collin,

Thank you for your reply, "/" was put in the topic according to explanation on article in the link below (format: Device\_Label/Variable\_Label)

> **[Connect Node-RED with Ubidots | Ubidots Help Center](https://help.ubidots.com/en/articles/1440402-connect-node-red-with-ubidots)**
>
> Interact with Ubidots' API over HTTP and MQTT using Node-RED's native libraries.

However, even I have followed the instruction on that article, I have not received the output of the nodes (node status is connected)

Best Regards,  
Zulpaedi

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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:** [12 April 2026 12:12 UTC](https://discourse.nodered.org/t/subscribe-a-mqtt-topic-in-ubidots-boolean-1-0-value/100754/4 "2026-04-12T12:12:56Z")

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Try MQTTExplorer then.

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**Author:** ![dceejay](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/dceejay/32/38_2.png) [@dceejay](https://discourse.nodered.org/u/dceejay)\
**Post date:** [12 April 2026 16:21 UTC](https://discourse.nodered.org/t/subscribe-a-mqtt-topic-in-ubidots-boolean-1-0-value/100754/5 "2026-04-12T16:21:39Z")

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Or maybe try subscribing to the wildcard # to maybe see a the incoming topics then refine from there. ( not all brokers allow subscribing to # but worth a try)

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**Author:** ![jbudd](https://avatars.discourse-cdn.com/v4/letter/j/5f8ce5/32.png) [@jbudd](https://discourse.nodered.org/u/jbudd)\
**Post date:** [12 April 2026 19:48 UTC](https://discourse.nodered.org/t/subscribe-a-mqtt-topic-in-ubidots-boolean-1-0-value/100754/6 "2026-04-12T19:48:06Z")

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Would # work for topics beginning with a / (which of course they shouldn't) ?

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**Author:** ![dceejay](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/dceejay/32/38_2.png) [@dceejay](https://discourse.nodered.org/u/dceejay)\
**Post date:** [12 April 2026 20:08 UTC](https://discourse.nodered.org/t/subscribe-a-mqtt-topic-in-ubidots-boolean-1-0-value/100754/7 "2026-04-12T20:08:02Z")

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Should do. Or try /# 🙂

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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:** [11 July 2026 20:08 UTC](https://discourse.nodered.org/t/subscribe-a-mqtt-topic-in-ubidots-boolean-1-0-value/100754/8 "2026-07-11T20:08:21Z")

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