MQTT Command Line Interface

MQTT 5.0 and 3.1.1 compatible and feature-rich MQTT Command Line Interface

Documentation

A detailed documentation can be found here

Features

All MQTT 3.1.1 and MQTT 5.0 features are supported
interactive, direct and verbose Mode for all MQTT Commands
Shell behavior with Syntax Highlighting, Command completion and history
Configurable default settings
Ability to connect various MQTT Clients to different brokers simultaneously
Quick broker tests
Export information from HiveMQ API endpoints
Various distributions available

Prerequisites

At least Java 8 is required to run MqttCLI.

Quickstart

The simplest way to start the MQTT CLI is typing:

$ mqtt

Download latest MQTT CLI package

Packages for Linux, Mac OS and Windows can be found here: Installation/Packages!

Building from source

To do a clean build, issue the following command:

$ ./gradlew clean build This runs the unit tests and compiles a new mqtt-cli-.jar into build/libs. You can then update an existing MQTT CLI installation by replacing its mqtt-cli-.jar with this one.

The build.gradle file contains further instructions for building the platform specific distribution packages. In a nutshell:

For MacOS/Linux brew: $ ./gradlew buildBrewFormula

For the Debian package: $ ./gradlew buildDebianPackage

For the RPM package: $ ./gradlew buildRpmPackage

For the Windows installer: $ ./gradlew buildWindowsZip

Command	Explanation
`mqtt sub -t topic`	Subscribe to a topic on default settings and block the console.
`mqtt sub -t test1 -t test2`	Subscribe to the topics test1 and test2 on default settings and block the console.
`mqtt sub -t test -h localhost -p 1884`	Subscribe to topic test at localhost:1884.

Publish

Command	Explanation
`mqtt pub -t test -m "Hello"`	Publish the message "Hello" to the test topics with the default settings
`mqtt pub -t test1 -t test2 -m "Hello Tests"`	Publish the message "Hello Tests" on both test topics with the default settings
`mqtt pub -t test -m "Hello" -h localhost -p 1884`	Publish the message "Hello" on localhost:1884

Shell

If interacting with several clients, using different contexts and publishing and subscribing with them in various ways, the shell mode with further sub commands is useful.

$ mqtt shell

The Shell-Mode is based around a client context driven use case. Therefore methods like Connect and Disconnect switch the current context of the shell and commands like Publish and Subscribe always relate to the currently active client context.

mqtt shell                # starts the shell

mqtt> con -i myClient           # connect client with identifier
myClient> pub -t test -m msg    # publish with new context client
myClient> dis                   # disconnect and remove context
mqtt> ...

In Shell-Mode the following Commands are available without an active context:

Commands

con, connect Connect an MQTT client
dis, disconnect Disconnect an MQTT client
switch Switch the current context
ls List all connected clients with their respective identifiers
cls, clear Clear the screen
exit

When connected you are switched to the context mode. In context mode all MQTT commands relate to the currently active client.

The following Commands are available with an active context:

Commands:

pub, publish Publish a message to a list of topics
sub, subscribe Subscribe this MQTT client to a list of topics
unsub, unsubscribe Unsubscribe this MQTT client from a list of topics
dis, disconnect Disconnect this MQTT client
switch Switch the current context
ls, list List all connected clients with their respective identifieres
cls, clear Clear the screen
exit Exit the current context

Test

The test command runs various tests against the specified broker to find out its features and limitations. By default the test command will use MQTT 3 clients to test the broker first and will afterwards check the connect restrictions returned by a connect of a MQTT 5 client. You can alter this behavior by specifying different options when using the command.

Test the public HiveMQ broker:

$ mqtt test -h broker.hivemq.com
MQTT 3: OK
        - Maximum topic length: 65535 bytes
        - QoS 0: Received 10/10 publishes in 25,74ms
        - QoS 1: Received 10/10 publishes in 26,27ms
        - QoS 2: Received 10/10 publishes in 70,01ms
        - Retain: OK
        - Wildcard subscriptions: OK
        - Shared subscriptions: OK
        - Payload size: >= 100000 bytes
        - Maximum client id length: 65535 bytes
        - Unsupported Ascii Chars: ALL SUPPORTED
MQTT 5: OK
        - Connect restrictions: 
                > Retain: OK
                > Wildcard subscriptions: OK
                > Shared subscriptions: OK
                > Subscription identifiers: OK
                > Maximum QoS: 2
                > Receive maximum: 10
                > Maximum packet size: 268435460 bytes
                > Topic alias maximum: 5
                > Session expiry interval: Client-based
                > Server keep alive: Client-based

HiveMQ

The HiveMQ command line argument offers various HiveMQ specific commands.

Show all available commands:

$ mqtt hivemq

The export command of the HiveMQ command line offers a set of commands to export various resources from a HiveMQ API endpoint.

$ mqtt hivemq export

Export client details from a HiveMQ node via the export clients command.

$ mqtt hivemq export clients

Please refer to the detailed documentation MQTT CLI Documentation for more examples and complete command descriptions.

Versioning

Semantic Versioning is used.

Contributing

See CONTRIBUTING.md

License

See LICENSE

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