Can not connect to ThingSpeak MQTT broker using MQTT X Client
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I have a problem with the connection to thingspeak MQTT broker using MQTT x client. After pressing the "Connect" button after a few seconds connection is not set.
I have followed the instructions described in: https://de.mathworks.com/help/thingspeak/use-desktop-mqtt-client-to-publish-to-a-channel.html.
Below you can see the settings in the MQTT X client. ClientID, Username and Password I took from the credentials file which was created when I add a new MQTT device in thingspeak.
I have already checked the discussion with a similar problem, but I can not figure out what could be the source of the problem.
I would like to ask your help with this problem.