ESP32 Light Controller

Table of Contents

1 Introduction

2 Light Systems

2.1 LED

2.1.1 LED stripes

2.2 Light control protocols

2.2.1 DALI

2.2.2 KNX

2.2.3 DMX512

2.2.4 Art-Net

3 ESP32 Light Controller

3.1 Espressif ESP32 Microcontroller

3.2 Hardware design

3.3 Software design

3.3.1 PWM output

3.3.2 Network configuration

3.3.3 UDP Implementation

3.3.4 Art-Net

3.3.5 HTTP Implementation

3.3.6 Web-Interface

4 Housing

5 Conclusion

5.1 Outlook

Project Goals and Scope

This thesis focuses on the development of a cost-effective, wireless light control unit named "ESP32 Light Controller." The primary objective is to create a versatile system capable of driving common anode and common cathode LED strips while offering multiple control interfaces, including a web-based GUI, UDP commands, and the professional Art-Net lighting protocol.

• Integration of the ESP32 microcontroller for wireless connectivity via WLAN and Bluetooth.
• Development of a custom PCB with half-bridge output stages and integrated current sensing.
• Implementation of software-based light control protocols (Art-Net and UDP).
• Design of a 3D-printed housing for the final prototype.

Excerpt from the Book

Summary of Chapters

1 Introduction: Outlines the project scope, requirements for the ESP32-based light controller, and the inclusion of network capabilities and hardware protection features.

2 Light Systems: Provides a theoretical foundation regarding LED functionality, their physical construction, and an overview of standardized light control protocols such as DALI, KNX, DMX512, and Art-Net.

3 ESP32 Light Controller: Details the core development phase, covering the microcontroller specifications, circuit hardware design, and the implementation of software functions for PWM, networking, and control protocols.

4 Housing: Describes the design process and final fabrication of the device housing using 3D construction software and a 3D printer.

5 Conclusion: Summarizes the successful realization of the prototype and provides an outlook on potential future enhancements, such as Bluetooth-based control and sensor integration.

Keywords

Light Control Unit, LED Strips, ESP32 Microcontroller, WLAN, Art-Net, PWM, Hardware Design, PCB, UDP, Smart Home, 3D Printing, Electronics, Automation, Lighting Protocols, Firmware.

Frequently Asked Questions

What is the core purpose of this paper?

The paper documents the design and development of the "ESP32 Light Controller," a wireless device for controlling LED lighting strips using a range of protocols.

What are the primary themes addressed in the work?

Key areas include semiconductor LED theory, hardware circuit design (half-bridge circuits), software implementation (PWM, UDP, HTTP), and the industrial light protocol Art-Net.

What is the central research objective?

The goal was to create a flexible, low-cost light control prototype that integrates with modern smart home systems and allows control via common web browsers and professional lighting consoles.

Which scientific methods or tools were applied?

The author utilized circuit design software (KiCad), 3D construction tools (Autodesk Inventor), and the Arduino development environment to implement the control logic on the Espressif ESP32 hardware.

What is covered in the main body of the text?

The main body focuses on the hardware design, including the output power stages and current sensing, and the software architecture, including PWM generation and various communication protocols.

Which keywords best characterize this project?

The work is defined by terms like ESP32, Art-Net, LED control, PCB design, PWM, and smart home integration.

How does the system protect against electrical damage?

Each output stage features integrated current sensing that monitors the LEDs, allowing the software to disable the respective transistors in the event of an overcurrent or short-circuit.

Why was the Art-Net protocol implemented?

Art-Net was integrated to allow the ESP32-based hardware to be controlled by professional lighting consoles and software applications over an Ethernet-based network.

What makes this controller compatible with different LED types?

The hardware is designed with a half-bridge configuration, enabling it to drive both "common anode" and "common cathode" LED strips at 12V or 24V.