MQTT-SN, COAP and LwM2M analysis - STM32 EmbeNET Node network

Objective of the Work:

• Review, implement, and analyze the use of application layer protocols in IoT devices built on ARM Cortex-M microcontrollers.
• Focus on usability in resource-constrained, low-throughput wireless mesh networks typical of IoT systems.
• MQTT, CoAP, and LwM2M were chosen for their diversity, popularity, and compatibility with the UDP transport protocol.
• The study utilized the embeNET wireless mesh network and the NUCLEO-WL55JC1 evaluation board.
• Measurements:
  • Evaluation of protocol effectiveness.
  • Assessment of their resource usage (Ram and Flash) and network impact.
  • Identification of optimization opportunities.
• Recommendations for the optimal selection of application layer protocols based on specific IoT system requirements.

More details in links below

Hardware

• STM32 NUCLEO-WL55JC1 development boards
• Raspberry Pi with Linux for testing purposes

Tech Stack

• C programming language
• EmbeNET Node Networking Stack (WSN, UDP, 802.15.4e-TSCH)
• STM32 environment
• MQTT-SN, CoAP and LwM2M Application Protocols
• Wireshark, Build Analyzer, Linux Protocol Servers and other testing environment

Implementation

The STM32CubeIDE project, hosted in the repository, includes the implementations of all three tested protocols. The MQTT-SN service is integrated into the EmbeNET system by default. For this project, I implemented and utilized the LobaroCoAP and WakaamaNode libraries.

Additional Links

Project presentation Google Slides [PL] (20.09.2024)

Master's thesis with detailed project description Google Drive [PL]

About project

• Developer: Miłosz Janik
• Made for Diploma Thesis - Master degree - "Application layer protocols for IoT devices using wireless connectivity and the UDP transport protocol."
• Thesis promoter: PhD Łukasz Krzak
• Field of study: Electronics and Telecommunications (Embedded Systems specialization)
• Status - Diploma thesis defended