topic Re: MQTT Connection to Broker Failing in ThingWorx Developers

MQTT Connection to Broker Failing

ST_10465152 — Tue, 10 Feb 2026 02:55:11 GMT

I am using ThingWorx version 9.3 with the MQTT Extension version 3.1. After configuring MQTT, the connection remains in a disconnected state, but it has been verified to be connected through a client tool.

Re: MQTT Connection to Broker Failing

Surya_Tiwari — Wed, 11 Feb 2026 11:12:54 GMT

Hi @ST_10465152 Can you take a look at the article below and let us know your output?

https://www.ptc.com/en/support/article/CS398400

Re: MQTT Connection to Broker Failing

ST_10465152 — Thu, 12 Feb 2026 06:46:06 GMT

Thank you so much, it worked! I was indeed using version 2.0 of the MQTT extension, and switching to version 3.1 still didn't resolve the issue. After reading the article, I cleaned the extensions in Tomcat, restarted ThingWorx, and reinstalled the MQTT extension, which finally fixed the problem

Re: MQTT Connection to Broker Failing

Surya_Tiwari — Thu, 12 Feb 2026 11:01:00 GMT

Hi @ST_10465152 kindly mark it as solution.