Install HiveMQ on Windows Server 2022 Standalone

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 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 variable during installation can be done by enabling the following setting
- Set JAVA_HOME Environment Variable manually:
  - 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\Java\jdk-11.0.22).
  - Click OK to close all dialogues.

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-4.25.1
- 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 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 or any other editor
  - Search for VARIABLES section
  - Add the heap configuration (4 GB in this case)
    set "JAVA_OPTS= %JAVA_OPTS% -Xmx4g"
  - 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

Please make sure HiveMQ Broker is running
Setup MQTT CLI
- Download MQTT CLI
  - Go to the release link https://hivemq.github.io/mqtt-cli/ and go to the latest release
  - Download the correct zip for Windows (mqtt-cli-4.25.0-win.zip on our case)
  - Extract the zip file
  - Open the command prompt and cd into the 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:
```
mqtt-cli.exe sub -h localhost -p 1883 -i MQTTCLIClientSUB -t "connection/test" -d
```
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 to the mqttcli folder and publish a message to the same topic with:
```
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.