Hello All, I have made a custom Python Paho MQTT client that can connect to the CirrusLink MQTT Server that I have installed on my Ignition Gateway. I would like to know how to setup my tags so that I can pub/sub to read and write tag values using my custom client by connecting to the local gateway ip and MQTT port.
Hi @matthew.ayre,
Thanks for your reply! I have setup my Transmission module, and I do see a folder called MQTT Tags in my Designer and verified that the Transmitter was in fact connected to the server (Shows 1 of 1 connected), I was also able to successfully connect to my MQTT server with my python script, however I am unsure what topic I should subscribe to get info at least from the example tags. Is it the Sparkplug ID or Tag Path listed in the Example Transmitter section?
I tried that yesterday and unfortunately that did not work, I used the SparkPlug ID and then appended the tag path on it to subscribe to the tag. I also looked at CirrusLinks MQTT Transmission setup doc which seems to have a different or older configuration. I’ve listed my script subscribe line, transmitter info, and designer tag structure below. I know its connected because I see the MQTT Distributor module shows the connection come up when my python script connects. Not sure where to go from here 
I’m not familiar with the specifics of your client, but I can tell you that from an MQTT perspective, Sparkplug messages originate from a spBv1.0 root topic. The Sparkplug Spec is a good and relatively short read.
EDIT: take a look at page 12 that describes the topic namespace:
namespace/group_id/message_type/edge_node_id/[device_id]
@kcollins1 , thanks for the reply. I believe I was running into this issue because my python client wasn’t of any Sparkplug spec, I was able to fix my problem following this guide that shows how you can setup a gateway event script to publish to a specific topic for non-Sparkplug clients, leaving it here for people who may have the same problem.
https://docs.chariot.io/display/CLD80/MQTT+Publishing+via+MQTT+Transmission
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