🚀 ESP32 Smart LED Controller

Wi-Fi-Controlled WS2812B RGB LED Strip Using ESP32

A smart addressable LED control system built using the ESP32 DevKit V1, WS2812B RGB LED strip, and FastLED library. The project features a responsive web dashboard that allows users to control LED colors, adjust brightness, and switch between dynamic lighting effects directly from a smartphone or computer.

The goal of this project is to explore embedded firmware development, Wi-Fi communication, web-based hardware control, and addressable RGB LED programming.

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✨ Features

• 📡 Wi-Fi Access Point: The ESP32 creates its own wireless network.
• 🌐 Web-Based Dashboard: Control the LED strip from a web browser.
• 🎨 RGB Color Control: Select and apply custom colors.
• 💡 Brightness Adjustment: Adjust LED brightness using a slider.
• 🌈 Dynamic Lighting Effects: Switch between multiple lighting modes.
• 📱 Mobile-Friendly Interface: Control the LEDs using a smartphone.
• ⚡ Real-Time Interaction: Send control commands to the ESP32 through HTTP requests.

🎬 Lighting Effects

Effect	Description
Solid Color	Displays a selected RGB color
Rainbow	Produces a continuously changing rainbow
Chase	Creates a moving LED chase effect
Breathe	Creates a pulsing brightness effect
Off	Turns off the LEDs

🛠️ Hardware Requirements

Component	Purpose
ESP32 DevKit V1	Main microcontroller and Wi-Fi controller
WS2812B RGB LED Strip	Individually addressable RGB lighting
5 V Power Supply	Supplies power to the LED strip
Jumper Wires	Electrical connections
Breadboard / Prototyping Setup	Circuit prototyping, where suitable

LED strip configuration: 41 addressable LEDs.

💻 Software and Technologies

• Programming language: C++ (Arduino framework)
• Microcontroller platform: ESP32
• Development environment: Arduino IDE
• LED control library: FastLED
• Networking: ESP32 Wi-Fi and WebServer libraries
• Communication protocol: HTTP
• User interface: HTML, CSS, and JavaScript

🏗️ System Architecture

 Smartphone / Computer
          |
          | Wi-Fi
          v
   ESP32 Access Point
          |
          v
    HTTP Web Server
          |
          v
    FastLED Library
          |
          v
   WS2812B LED Strip
       (41 LEDs)

The ESP32 hosts a Wi-Fi network and serves a web dashboard. When a user changes the color, brightness, or lighting effect, the browser sends an HTTP request to the ESP32. The firmware processes the request and updates the LED strip.

🔌 Getting Started

1. Install the Required Software

• Install the Arduino IDE.
• Install ESP32 board support using the Arduino Boards Manager.
• Install the FastLED library through the Arduino Library Manager.

2. Clone the Repository

git clone https://github.com/Rupam4604/-ESP32_LED_Controller.git
cd -ESP32_LED_Controller

3. Open the Arduino Sketch

Open the following file in Arduino IDE:

led_contrller_esp32_v1.0/
└── led_contrller_esp32_v1.0.ino

Select ESP32 Dev Module or the appropriate board for your hardware, then select the correct serial port.

4. Configure and Upload

Check the LED data pin, LED count, Wi-Fi access-point credentials, and other settings in the sketch. Connect the ESP32 to your computer and upload the firmware.

5. Connect to the Controller

1. Power on the ESP32 and LED strip.

2. Connect your phone or computer to the Wi-Fi access point configured in the firmware.

3. Open a browser and navigate to:

   http://192.168.4.1

4. Select a color, adjust brightness, and experiment with the lighting effects.

The device's access-point name and password are defined in the firmware.

🔋 Power and Wiring Notes

• Use a suitable regulated 5 V supply for the WS2812B strip.
• Connect the ESP32 ground and LED power-supply ground together.
• Connect the LED data input to the configured ESP32 GPIO.
• Ensure the LED strip's data direction follows its arrows from DIN toward the next LED.
• For a more robust installation, use an appropriate 3.3 V-to-5 V logic-level shifter and a series resistor on the data line.
• For larger strips, use appropriate power wiring and power injection as needed.

Safety: Never connect 5 V directly to an ESP32 GPIO. Take care when working with mains-powered power supplies.

📁 Repository Structure

-ESP32_LED_Controller/
│
├── README.md
│
└── led_contrller_esp32_v1.0/
    ├── README.md
    └── led_contrller_esp32_v1.0.ino

The root README provides an overview of the complete repository, while the Arduino sketch folder contains the firmware and its project-specific documentation.

🧠 Key Learning Outcomes

Through this project, I am developing practical skills in:

• ESP32 microcontroller programming
• Embedded C++ and firmware development
• Wi-Fi networking and HTTP communication
• Web server implementation on microcontrollers
• WS2812B addressable LED control
• Integrating hardware with a browser-based interface
• Debugging and testing embedded systems

🚧 Future Improvements

Planned enhancements for future versions include:

• Additional customizable lighting effects
• Animation speed control and smoother transitions
• Saving settings across power cycles
• Improved firmware structure and error handling
• Integration with other IoT platforms
• PCB design and a dedicated enclosure

These features are planned improvements and are not necessarily part of V1.

👨‍💻 Author

Rupam Ghosh

B.Tech in Electronics & Communication Engineering | Aspiring Embedded Systems & Firmware Engineer

• GitHub: @Rupam4604
• LinkedIn: Connect with me

I am passionate about embedded systems, electronics, IoT, firmware development, and robotics. I build hands-on projects to strengthen my engineering skills and turn ideas into working hardware.

⭐ If you find this project interesting, consider starring the repository!

Built with curiosity, electronics, and a passion for embedded systems.