MQTT Client Example with TLS 1.3 Encryption on NUCLEO-F429ZI

This example demonstrates how to establish a secure connection to a MQTT broker using TLS v1.3 encryption on a NUCLEO-F429ZI board. It subsequently establishes a Modbus TCP connection to a PLC, reads a holding register, and transmits its value to the MQTT broker. The register is then incremented by one, updated on the PLC, and this cycle repeats continuously.

Features 🧰

• Secure connection to mqtt broker using TLS v1.3. 🔐
• Periodic MQTT message publishing (every second). ⏱️
• Periodic Modbus TCP communication. 🔄
• Utilizes NUCLEO-F429ZI board for implementation. 💻

Requirements ✅

• NUCLEO-F429ZI board: This example is specifically tailored for the NUCLEO-F429ZI development board.
• IDE: STM32CubeIDE 1.16.0 📥
• MQTT broker: You'll need an MQTT broker that supports TLS 1.3 connections. 🧩
• PLC You'll need a PLC that support modbus tcp.

How to Run 🚀

1. Compile:     Compile the example code along with your chosen MQTT broker server and TLS version. 🧑‍💻

2. Execute:     Flash the compiled code onto the NUCLEO-F429ZI board.     Run the code on the board. 🏃‍♀️

Important Notes ⚠️

• Network Connectivity: Make sure you have an active internet connection to reach the server. 🌐
• Broker Requirements: The broker might have specific requirements for client authentication or topic subscriptions. Refer to their documentation if needed. 📖
• Error Handling: The example code might need to be enhanced with proper error handling and logging for production environments. 🐛

Disclaimer 📢

This is a basic example. Adapt and extend it as per your specific use case and security requirements. 🛠️

License 📄

This code is provided under the MIT License. Feel free to use and modify it. 👍

Contributing 🤝

Contributions are welcome! Please submit a pull request or open an issue if you find any bugs or have suggestions for improvement. 🙏

Todo 🚧

1. Add post-quantum secure element integration. 🛡️