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  • Running Windows Environment e.g. HiveMQ Installation Guide - Windows Server 2022 on AWS

  • Check Minimum system hardware requirements https://docs.hivemq.com/hivemq/latest/user-guide/system-requirements.html#minimum

  • Install JRE (OpenJDK JRE 11 or newer is required.)

    • Download and Install JRE 11 or later Later https://adoptium.net/en-GB/temurin/releases/?arch=x64&os=windows&package=jre&version=11. Please do note the Java version for the next step (11.0.22 in our case).

    • (Recommended) Set the Environmental JAVA_HOME environment variable during installation can be done by enabling the following setting

    • Set (Manually) If you want to set JAVA_HOME Environment Variable manually environment variable manually, follow the steps:

      • Right-click on "This PC" and select "Properties".

      • Click on "Advanced system settings".

      • In the System Properties window, go to the "Advanced" tab and click on "Environment Variables".

      • Under "System Variables", click "New" and add a new variable:

        • Variable name: JAVA_HOME

        • Variable value: the path to your Java installation (e.g., C:\Program Files\JavaEclipse Adoptium\jdk-11.0.22.7-hotspot\).

        • C:\Program Files\Eclipse Adoptium\jdk-11.0.22.7-hotspot\bin exists under the path system variable list.

      • Click OK to close all dialogues.

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  • Download and Extract HiveMQ:

    • First, you need to download the HiveMQ ZIP file from the official HiveMQ website. https://www.hivemq.com/download/

    • Unzip the folder to C:\ e.g. C:\hivemq-4.2527.10

    • Rename this folder to hivemq so the path looks like C:\hivemq

    • Files inside the folder would have a structure e.g. C:\hivemq\bin

  • Doing sanity checks

    • Setting Heap Size to 50% of system memory (2GB minimum, 4GB in this installation as RAM is 8 GB)

      • Go to C:\hivemq\bin

      • Open the run.bat file with notepad Notepad or any other editor

      • Search for the VARIABLES section

      • Add the heap configuration (4 GB in this case)The following code example sets the heap size to the recommended 50% of the available RAM:
        set "JAVA_OPTS=%JAVA_OPTS% -Xmx4g"

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        -XX:+UnlockExperimentalVMOptions -XX:InitialRAMPercentage=40 -XX:MaxRAMPercentage=50 -XX:MinRAMPercentage=30"

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      • Save the file

  • Run HiveMQ broker

    • Go to C:\hivemq\bin

    • Right-click on the file “run.bat” and run it as an administrator

    • This should start the HiveMQ process as shown below

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  • Please make sure HiveMQ Broker is running

  • Please make sure that port 1883 is enabled (e.g. inbound rules under security groups)

  • Setup MQTT CLI

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  • Download the correct zip for Windows (mqtt-cli-4.

    25

    27.0-win.zip

    on

    in our case)

    • Extract the zip file

    • Open the command prompt and

      cd

      CD into the MQTT CLI folder, this folder contains mqtt-cli.exe which will be used for the next steps.

  • Subscribe to a Topic: Subscribe to a topic using MQTT CLI with the command:

    Code Block
    mqtt-cli.exe sub -h localhost -p 1883 -i MQTTCLIClientSUB -t "connection/test"

    This command subscribes to the topic connection/test on the broker running on localhost.

  • Publish to the Same Topic: Open another command prompt window, cd CD to the mqttcli MQTT CLI folder, and publish a message to the same topic with:

    Code Block
    mqtt-cli.exe pub -h localhost -p 1883 -i MQTTCLIClientPUB -t "connection/test" -m "Test MQTT CLI"

    This publishes the message "Test MQTT CLI" to the connection/test topic.

  • Verify Message Receipt: Check the first command prompt window where you subscribed to the topic. You should see the message "Test MQTT CLI" appear, indicating that the message was successfully published and received.

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