# Topics collector in MQtt fx

**URL:** <https://forum.inductiveautomation.com/t/topics-collector-in-mqtt-fx/43835>\
**Category:** Ignition\
**Created:** [February 25, 2021, 5:47pm UTC](https://forum.inductiveautomation.com/t/topics-collector-in-mqtt-fx/43835 "2021-02-25T17:47:48Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![firan.gabriela](https://avatars.discourse-cdn.com/v4/letter/f/e19adc/32.png) [@firan.gabriela](https://forum.inductiveautomation.com/u/firan.gabriela)\
**Post date:** [February 25, 2021, 5:47pm UTC](https://forum.inductiveautomation.com/t/topics-collector-in-mqtt-fx/43835/1 "2021-02-25T17:47:48Z")

</div>

Hi guys, i am new to all this MQtt business, and i wanted to do some test. So i have Ignition installed on my laptop, and Mqtt fx also installes. I have 2 transmitters - see below

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/7/e/7ee5d4d22615ade4a9bdcc7a9818d268ccf96679.png)

I want to be able to subscribe to the data from Mqtt fx. I have seen thise topic collector , and when scanning, it finds this as a topic

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/c/c/cc21a971943d8a731f3834ddfaca13502c26d481.png)

So, when i subscribe i can see the values from Sample Tags.

I was trying to subscribe to the other tags, from My Group MQTT , but i can’t get the topic right.

First, i want to understand how did Mqtt Fx found this topic:

spBv1.0/Group/DDATA/Ignition/SampleTags

I presume it is somewhere defined in the engine, but not sure how to find it.

So, is it following this format?  
namespace/group\_id/message\_type/edge\_node\_id/[device\_id]

And if that is the case, i have tried this for subscribing to the other group:

Namespace = spBv1.0  
group\_id = My MQTT Group  
message\_type=DDATA  
edge\_node\_id=Edge Node b5937c  
[device\_id]=PLC 1

I have based it off the engine folder structure, but it does not see to work

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/1/2/12e04a36d0ada10abf7d4102e4662afe4f42fb56.png)

So can someone give me a hint on how these topics are created?

Thanks!

---

<div class="post-metadata">

**Author:** ![Vidar\_Hetlelid](https://avatars.discourse-cdn.com/v4/letter/v/dfb087/32.png) [@Vidar\_Hetlelid](https://forum.inductiveautomation.com/u/Vidar_Hetlelid)\
**Post date:** [October 13, 2022, 8:13pm UTC](https://forum.inductiveautomation.com/t/topics-collector-in-mqtt-fx/43835/2 "2022-10-13T20:13:42Z")

</div>

Hi, i have the exact same question. Did you find out? Or is there anyone else in here who can help me out? 😁