MQTT - Fundamentals (Simulations and Security Setup)

Download the mosquito broker locally on Windows, choose 64-bit or 32-bit versions, and explore options for Mac, Linux, and Raspberry Pi; next class covers step-by-step installation.

Install mosquitto on Windows by creating a dedicated folder, running the installer, configuring the broker with mosquitto.conf and mosquitto.password, and starting the broker to enable publish and subscribe.

Learn to test the mqtt broker from the command line by starting the broker, publishing to a topic, and subscribing to receive messages on localhost.

Download and install the MQTT box client to set up a local simulation environment, practice MQTT concepts, and test with mosquito in the cloud.

Install the MQTT.fx client on Windows, choose the free version 1.7.1 rather than the paid 5.0, and create shortcuts to run simulations with the broker.

Download and install the MQTT explorer client across Windows, macOS, and Linux, choose between installer and portable options, and learn to read and simulate data with the explorer.

Test the mosquitto broker on localhost with mqtt box as publisher and mqtt fx clients as subscribers. Publish a message to a topic and verify broker and subscriber exchange it.

Explore mqtt prefix id control to secure client connections by enforcing a required client id prefix on the Mosquitto broker, testing authorization for prefixed vs non-prefixed clients.

Learn to secure an mqtt broker by enabling username and password authentication, create user credentials in a password file, load the config, and prevent anonymous access for safe client connections.

Configure MQTT access control lists to grant read or write permissions on topics. Create and enable an ACL file, and test anonymous and registered user access.

Secure MQTT with TLS and certificate authentication on port 8883, encrypting messages and credentials. Learn to generate CA, CSR, and server certs with OpenSSL and configure Mosquitto for TLS.

Download Wireshark for the MQTT protocol and prepare the Windows 64-bit installer, as the class covers downloading and readying the network analyzer for upcoming installation steps.

Install and launch Wireshark for MQTT protocol exploration, follow a step-by-step setup, run the app as administrator, and begin testing network captures.

Demonstrates encrypted vs unencrypted MQTT messages using a Mosquitto broker and Wireshark, showing how unencrypted traffic reveals usernames, passwords, and client IDs, while encryption protects message payloads.

Download and install the EMQX broker on Windows, then test its features and explore local versus cloud options for hands-on MQTT simulations.

Install and run the EMQX MQTT broker on Windows, start the EMQX broker, access the web dashboard to monitor clients and topics, and update the admin password for secure access.

Configure and connect to the EMQX mqtt broker and mqtt box on 127.0.0.1:18083, authenticate with a username and password, then publish and subscribe to topics and view logs.

Practice setting up a local EMQX mqtt broker and connecting with mqtt client explorer, configuring credentials, and publishing and subscribing to pressure topics to visualize real-time data.

Set up an EMQX broker, configure a client with a unique client ID and credentials, and test publish/subscribe with MQTT.fx to verify security and connectivity.

Learn how to create a free HiveMQ cloud account, sign up, verify your email, and configure credentials to connect up to 100 devices to the cloud mqtt broker.

Connect to the HiveMQ Cloud MQTT broker using the MQTT client FX, enable TLS, publish to a topic, and verify by subscribing to the same topic.

Connect the client to the HiveMQ cloud MQTT broker using the MQTT box, and publish and subscribe to a test topic to demonstrate communication between two clients.