Unable to Connect MQTT Thing to External Broker (ThingWorx 10.0.1 + MQTT Extension 4.0.0)

Hi everyone,

I am trying to configure an MQTT Thing in ThingWorx 10.0.1-b202 using MQTT Extension 4.0.0.

I followed the steps documented in the ThingWorx Help Center:
https://support.ptc.com/help/thingworx/platform/r9/en/index.html#page/ThingWorx/Help/Extensibility/MQTT.html

Environment

• ThingWorx Version: 10.0.1-b202

• MQTT Extension: 4.0.0

• MQTT Broker: demo.thingsboard.io

Steps Performed

1. Installed the MQTT Extension.

2. Created a Thing using the MQTT Thing template as described in the documentation.

3. Configured the MQTT broker as demo.thingsboard.io.

4. Created a property on the Thing and configured the corresponding mapping in the Mapping infotable under the Configuration section.

Issues

1. The MQTT Thing never connects to the broker.

2. When I try to update the property value under the Properties tab, I receive the following error:

   • "Error occurred: Unexpected error occurred on server."

3. The Application Log shows the following messages:

   Unable to close client in MQTT Thing ITH.MQTT.TestThing : Connect already in progress
   Unable to connect to MQTT in [ITH.MQTT.TestThing] : Timed out waiting for a response from the server
   

Questions

• Has anyone encountered this issue while connecting to an external MQTT broker such as demo.thingsboard.io?

• Are there any additional configuration steps required for MQTT Extension 4.0.0 with ThingWorx 10.0.1?

• Is there any known compatibility issue between this ThingWorx version and the MQTT Extension version I am using?

Any suggestions or troubleshooting steps would be greatly appreciated.

Thank you!