Node-RED: IoT projects with ESP32, MQTT and Docker

Packt via Coursera

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Provider

Coursera
Pricing

Free Online Course (Audit)
Languages

English
Certificate

Paid Certificate Available
Duration & workload

14 hours 58 minutes
Sessions

On-Demand
Subtitles

English

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Overview

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Unlock the power of IoT by integrating Node-RED, ESP32, MQTT, and Docker to build real-world automation projects. This hands-on course will guide you through setting up a complete IoT infrastructure, from deploying MQTT brokers and databases in Docker containers to programming ESP32 microcontrollers for smart applications. You’ll start by installing essential software in Docker, setting up Node-RED for visual programming, and securing your MQTT communications. Then, you'll explore ESP32 development, including sensor integration, data visualization, and cloud connectivity. You’ll create real-world projects like a smart weather station, surveillance system, and home automation setup—all while learning best practices in IoT security and efficiency. By the end of the course, you’ll have a fully functional IoT ecosystem with automated data collection, visualization in Grafana, and secure remote control. Whether you're an IoT hobbyist, developer, or engineer, this course gives you the tools to build scalable smart devices with cutting-edge technologies. This course is ideal for makers, developers, and IoT enthusiasts with basic programming and networking knowledge. Some familiarity with Linux, Docker, and MQTT is helpful but not required. Get ready to transform your IoT ideas into reality!

Syllabus

Introduction

In this module, we will introduce the course, its objectives, and the instructor. You’ll learn about the essential prerequisites, the resources provided, and the hands-on approach we follow. We’ll also discuss important disclaimers and guidelines to ensure a smooth learning experience.

Install all programs as containers

In this module, we will guide you through setting up a complete IoT software stack using Docker. You’ll learn how to install and configure key services like Mosquitto, Node-RED, InfluxDB, and MariaDB as containers. We’ll also cover authentication, SSL setup, and automated backups to ensure a secure and efficient workflow.

First overview of Node-RED

In this module, we will explore the fundamentals of Node-RED and its role in IoT projects. You’ll get an overview of flows, nodes, and payload manipulation. We’ll also dive into JSON processing, context variables, and the wide range of available nodes that enhance automation capabilities.

MQTT Basics

In this module, we will cover the essential concepts of MQTT, a lightweight messaging protocol for IoT communication. You’ll learn how publishers and subscribers interact, how to use wildcards and retained messages, and how to implement QoS levels. We’ll also introduce tools like MQTT Explorer for monitoring topics.

Setup Node-RED

In this module, we will set up Node-RED to communicate with an MQTT broker, process incoming data, and store it in databases. You’ll learn how to configure Node-RED’s MQTT nodes, save IoT data in InfluxDB, and create interactive visualizations using Grafana.

Basic sketch with ESP32 for WIFI and MQTT

In this module, we will create a foundational ESP32 sketch for connecting to WiFi and an MQTT broker. You’ll learn how to send and receive JSON data, control LEDs via MQTT messages, and integrate development tools like VS Code with PlatformIO and the Arduino IDE.

Mini weather station

In this module, we will build a mini weather station using ESP32 and sensors like BMP180 and BH1750. You’ll learn how to collect environmental data, transmit it via MQTT, visualize it in Grafana, and use hysteresis for intelligent fan control.

Visualize weather data on the e-ink display

In this module, we will display weather data on an e-ink screen using ESP32. You’ll learn how to retrieve data via REST APIs, process JSON, format text and graphics, and implement deep sleep mode to extend battery life.

Surveillance camera with ESP32-Cam incl. Machine-Learning Node

In this module, we will turn an ESP32-Cam into a smart surveillance camera. You’ll learn how to capture images, send them via MQTT, and display them in Node-RED. We’ll also implement motion-triggered alerts via Telegram for real-time security monitoring.

Time recording with RFID and TimeTagger

In this module, we will use an RFID reader to log time records and store them in a database. You’ll learn how to interact with Node-RED, TimeTagger, and a web API to automate time-tracking tasks efficiently.

Time-controlled plant watering with water level monitoring

In this module, we will create an automated plant watering system with ESP32. You’ll learn how to control relays via MQTT, measure water levels with an ultrasonic sensor, store data in MariaDB, and visualize it on a dashboard.

Smart plugs and relays

In this module, we will work with smart plugs and relays to automate energy management. You’ll learn how to flash and configure Tasmota, control devices using Node-RED, and visualize energy data in Grafana for efficient monitoring.

Mini IoT Button with 100 days battery life

In this module, we will build a battery-powered IoT button using ESP32 XIAO. You’ll learn how to implement low-power strategies, toggle functions in Node-RED, and calculate battery consumption for extended operation.

Internet Radio

In this module, we will create an ESP32-based internet radio. You’ll learn how to stream online stations, control playback using MQTT, and set up a dashboard for scheduling alarms and managing audio settings.

MQTT with TLS

In this module, we will enhance MQTT security using TLS encryption. You’ll learn how to configure SSL certificates, mount them in Docker, and analyze encrypted traffic with Wireshark.

Conclusion

In this module, we will recap all the concepts and projects covered throughout the course. You’ll receive final insights from the instructor and recommendations for future IoT development.