Esp MQTT

Abstract

1. Introduction

This component bundles the lwmqtt client and adds a simple async API similar to other esp networking components. Secure connections are supported via the mbedTLS library.

2. Objective

MQTT component for esp-idf projects based on the lwmqtt library

This project demonstrates how C, MQTT, ESP32 can be applied to a real-world Internet of Things (IoT) problem.

4. Technology Stack

5. System Requirements

General requirements for this technology stack — check the README for exact versions.

• Arduino IDE / PlatformIO or a C compiler (gcc)
• Target board where applicable
• Git (to clone the repository)

6. Installation & Setup

git clone https://github.com/256dpi/esp-mqtt.git
cd esp-mqtt

git submodule add https://github.com/256dpi/esp-mqtt.git components/esp-mqtt
git submodule update --init --recursive

Full setup instructions are in the project README.

7. Future Enhancements

Suggested extensions you can add to make this your own project.

• Add a mobile dashboard using Blynk or Firebase
• Store readings in a cloud database for history charts
• Add alerts via SMS / Telegram when thresholds are crossed

8. Viva / Review Questions

Common questions examiners ask for projects in this domain.

1. Which microcontroller / board and sensors are used and why?
2. How does the device send data (Wi-Fi, MQTT, HTTP, Bluetooth)?
3. Where is the sensor data stored and visualised?
4. How is power consumption managed?
5. How would you secure the device and its communication?

9. Source Code & License

This project is developed by 256dpi and published on GitHub under the MIT License. Please follow the license terms and credit the original author when you use or modify this code.