This is an old revision of the document!
MQTT.fx can be downloaded here
To create a new MQTT client click on the configuration icon next to “Connect” or from the dropdown “Extras → Edit Connection Profiles”
Click on the plus icon on the bottom left to create a new MQTT client profile.
Here you have to configure the client to connect with your selected MQTT broker.
The important fields are on the picture below, you can leave the rest on their default settings.
If you broker has username and password validation enabled then enter them under the “User Credentials” category.
To connect to the broker click on the “Connect” button as shown in a previous picture. If you are connected successfully the light on the right will turn green otherwise it will turn red and you will get a message “Unable to connect to server”. After successfully connecting you can publish and subscribe to topics from their respective categories.