About

MQTT is lightweight, intuitive, and easy to use messaging protocol suitable for IoT applications and devices. Aside from the traditional request/response communication, MQTT protocol uses a paradigm known as publish/subscribe. Users (applications/devices) can publish or send data under certain topics. Similarly, other users can show interest in receiving updates and messages published on certain topic(s) by first subscribing. A topic is a meta-data and a short description of the communicated messages (e.g., Chicago weather, traffic updates), and users can subscribe to a wide range of topics. In Spring 2021, I am adapting a 300-level course to an honors credit, fulfilling one of the curriculum requirements of the Honors Program. To adapt a course, I am expanding on what I am learning for my Computer Networks class, under a faculty mentor, by exploring the work of the MQTT protocol to implement a user-friendly JavaScript-based dashboard for MQTT users. Using the dashboard, a user can subscribe to a topic or a set of topics, publish a message(s), subscribe to topic(s), and view the published messages in a suitable format. The developed dashboard allows different types of messages to be published and displayed, that include JSON/XML-based content, documents, and images. The dashboard is currently being hosted in Amazon Web Services, S3 buckets.

What's different from other MQTT dashboards?

- Publish messages and files like text files, JSON, XML
- Pop-up notifications
- Logs

Logic created to publish user files

Understand that all MQTT broker message payloads are just byte arrays at the transport level.

•   ==> create a array buffer
  

•         ==> wrap and convert process the file as a byte array (Unit8Array)
  

•                   ==>publish the array to a topic
  

Logic for recieving files from a topic

•  ==> Second user recieves the byte array through Logs
  

•     ==> Upon clicking download, byte array converted back to original file using library "download.js" 
  

All Features:

- Connect to any broker like hiveMQ
- Subscribes to topic(s)
- Unsubscribes to topic(s)
- Select multiple subscribed topics
- Publish messages and files like text files, JSON, XML
- Pop-up notifications
- Logs

Libraries used:

- <script src="https://cdnjs.cloudflare.com/ajax/libs/paho-mqtt/1.0.1/mqttws31.min.js"</script>
- <script src="https://cdn.jsdelivr.net/npm/sweetalert2@10"></script>
- <script src="download.js">https://github.com/rndme/download</script> 

References

- HiveMQ, http://hivemq.com/demos/websocket-client/
- stackoverflow, https://stackoverflow.com/
- Steve's Internet Guide, http://www.steves-internet-guide.com/
- Thomas Laurenson, https://www.thomaslaurenson.com
- Eclipse Paho JavaScript Client, https://www.eclipse.org/paho/index.php?page=clients/js/index.php
- Download Library, https://github.com/rndme/download
- https://github.com/logos

Authors

• Developer:

  • Muhammad Bangash, Northeastern Illinois University, Department of Computer Science & Honors Program
  • https://www.linkedin.com/in/msbangash/

• Mentor:

  • Professor Ahmed Khaled, Northeastern Illinois University, Department of Computer Science
  • https://cs.neiu.edu/aekhaled/

How to Contribute?

Just include this README.md file and License file to your project.

License

BSD 2-Clause License Copyright (c) 2021, mbangash1neiu