MQTT Client
The MQTT Client tool allows users to publish messages, access subscriptions, and perform quick troubleshooting.
On the MQTT Client page, you can:
- View messages as they are published to the broker in real-time.
- Add subscriptions to specific topics, with support for wildcard characters for broader topic coverage.
- Send messages to the broker with custom topics, retain properties, and QoS settings.
To access the MQTT Client pane:
- Log in to Litmus UNS.
- From the Navigation panel, select Tools. The MQTT Client pane appears.
Refer to the following actions you can take from the MQTT Client's web UI:
Action | Details |
|---|---|
[1] Connection Status | Displays the current status of the connection to the MQTT broker ( "Connected", "Disconnected"). |
[2] Add Subscription | Add a new topic subscription. Supports wildcard characters for flexible topic matching. |
[3] Filter | Allows users to filter messages based on criteria such as topic or content. |
[4] Auto-scroll | Enable or disable automatic scrolling for the message feed. |
[5] Message Feed | Displays all received messages for subscribed topics in real-time. |
[6] Publish Message Panel |
|
- What should I do if I am experiencing connection issues?
- Verify the broker URL and port, and ensure proper Web Socket configuration (e.g., using wss://).
- What if I cannot receive any messages?
- Confirm that the subscription topic path matches the publisher's topic and check if wildcard usage is appropriate.
- What can I do if I'm unable to publish messages?
- Validate that the topic and message payload format are correct, and ensure that the broker is online and accepting connections.