Unable to connect via MQTT (UPDATE: able to connect but now topics filter and showing selected topics not working as intended)

[jr-wong]

Trying to connect via MQTT but plot juggler keeps returning an error.

First off, I've fixed the issue so that DataStreamMQTT plugin builds correctly by renaming the FindMOSQUITTO.cmake file, so it builds fine and MQTT subscriber is an option for streaming. I'm operating on a Rocky 9 Linux OS.

Below is the settings i'm using. My mosquitto broker is on local host for port 1883. I'm also publishing simple data to this port.

When I try to connect, i get this error

on the broker terminal, i see plot juggler connect to the broker but fails to stay connected.

on the terminal that i opened plot juggler with, i get these error messages

I'm not too familiar with Qt or with plot juggler code to troubleshoot the issue, though i've been trying. Hopefully it is something that is clear to someone on the team to be able to fix easily? or is it something I may be doing incorrectly?

[jr-wong]

Update: i realize that my broker i was running had a max_keepalive value of 30. Default value of keep alive is 60 for subscribers and if the value keep alive value of a subscriber is greater than the value of the broker's max_keepalive value, it'll reject it. So by increasing my max_keepalive value on the broker to 60, i'm able to connect, with MQTT 3.1 protocol.

Ok i have it plotting my example data. The issue i'm having now is that the topics filter needs to have the exact topic path for anything to come up in the "select a specific topic" box, which obviously ends up being the exact topic i put in the filter. unsure if it may be another broker parameter i'm setting that is preventing me from seeing all messages.