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What is MQTT.fx®?
MQTT.fx® is a feature-rich MQTT client software designed for interacting with MQTT (Message Queuing Telemetry Transport) brokers. It provides a user-friendly interface for publishing and subscribing to MQTT topics, message inspection, and connection management.
How do I install MQTT.fx®?
- Visit the official MQTT.fx® website.

- Purchase the appropriate license based on your needs.

- Download the latest release for your operating system (Windows, macOS, Linux).

- Follow the installation instructions provided for your specific platform.
What are the available commercial licences for MQTT.fx®?
MQTT.fx® is now available under commercial license:

- Single License: One concurrent user.

- Team License: Supports up to five concurrent users.

- Enterprise License: Provides an unlimited number of concurrent users.

All of them are valid for one year.
How do I connect MQTT.fx® to an MQTT broker with the commercial licence?
- Open MQTT.fx®

- Click on the "Connection" icon.

- Enter the required information, including broker address, port, client ID, and credentials.

- Use the purchased license key during the connection setup.

- Click "Connect" to establish a connection to the MQTT broker.
Can I use MQTT.fx® with both public and private MQTT brokers with the commercial licence?
Yes, MQTT.fx® with a commercial license supports connections to both public brokers (cloud services) and private brokers hosted on your local network or other specified servers.
How do I publish messages using MQTT.fx® with the commercial licence?
- After establishing a connection, click on the "Publish" icon.

- Specify the topic for message publication.

- Enter the message payload.

- Optionally, set the QoS (Quality of Service) level and other parameters.

- Click "Publish" to send the message to the MQTT broker.
How do I subscribe to topics in MQTT.fx® with the commercial licence?
- Click on the "Subscribe" icon.

- Enter the topic(s) you want to subscribe to.

- Choose the QoS level for the subscription.

- Click "Subscribe" to start receiving messages on the subscribed topics.
Can I view the history of published and received messages with the commercial licence?
Yes, MQTT.fx® provides a message log that displays the history of both published and received messages. You can review past messages and their details for troubleshooting or analysis.
Is there a way to save and load connection configurations with the commercial licence?
Yes, MQTT.fx® with a commercial license allows you to save connection configurations for quick and easy access. You can save configurations to files and load them as needed.
Where can I find more information and support for MQTT.fx® with the commercial licence?
- Refer to the official MQTT.fx® documentation available on the website.

- Contact the MQTT.fx® support team for assistance ([email protected])

- Check for updates and announcements on the official website or through communication channels associated with MQTT.fx®