🌈 AtomS3 Lite RGB Rainbow Demo

A colorful RGB LED demo for M5Stack AtomS3 Lite with 4 different lighting modes.

✨ Features

Mode	Description
🌈 Rainbow Cycle	Smoothly cycles through all colors
💨 Breathing	Fades in and out with current color
✨ Random Blink	Changes to random colors every 200ms
🎨 Button Control	Manually select from 8 preset colors

🛠️ Hardware

• M5Stack AtomS3 Lite
• RGB LED: GPIO 35
• Button: GPIO 41

📦 Installation

Prerequisites

• PlatformIO installed
• USB-C cable

Setup

1. Clone or download this repository:

git clone https://github.com/QQSHI13/atoms3-rainbow.git
cd atoms3-rainbow

2. Open in PlatformIO:

pio run --target upload

Or use VS Code with PlatformIO extension.

🎮 Usage

Mode Switching

• Long press button (>500ms): Switch between 4 modes
• Serial Monitor (115200 baud): See current mode

Mode Details

🌈 Rainbow Cycle (Default)

• Automatically cycles through rainbow colors
• Updates every 20ms for smooth transition

💨 Breathing

• Current color fades in and out
• Relaxing breathing-like effect

✨ Random Blink

• Jumps to random color every 200ms
• Party mode!

🎨 Button Control

• Short press: Cycle through 8 colors (Red, Green, Blue, Yellow, Purple, Cyan, Orange, White)
• Color name printed to Serial Monitor

🔧 Customization

Change Rainbow Speed

// In rainbowCycle()
if (millis() - lastUpdate > 10)  // Lower = faster

Change Brightness

// In setup()
FastLED.setBrightness(200);  // 0-255, default is 128

Add More Colors

// In buttonControl()
CRGB colors[] = {
    CRGB::Red,
    CRGB::Green,
    CRGB(255, 100, 0),  // Custom orange
    // Add more...
};

📁 Project Structure

atoms3-rainbow/
├── platformio.ini      # PlatformIO configuration
├── src/
│   └── main.cpp        # Main source code
└── README.md           # This file

📝 Code Explanation

Key Functions

• rainbowCycle(): Increments hue value, creates smooth color transition
• breathingEffect(): Sine wave-like brightness modulation
• randomBlink(): Uses random8() for random hue
• buttonControl(): Debounced button reading with color cycling
• checkModeButton(): Long press detection for mode switching

Libraries Used

• FastLED: LED control library

🔌 Wiring

No wiring needed! AtomS3 Lite has built-in RGB LED on GPIO 35.

For external LED (optional):

• Connect SK6812/WS2812 LED data pin to GPIO 35
• Connect GND to GND
• Connect VCC to 3.3V or 5V

📄 License

GPL-3.0 License - See LICENSE for details.

🙏 Credits

Built by QQ with Nova ☄️

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Enjoy your colorful AtomS3 Lite! 🦐✨

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