RGB LED Controller with Rotary Encoder and LCD Display

This project allows you to control an RGB LED's color intensity and blinking pattern using a rotary encoder and an LCD display. The settings are stored in EEPROM, ensuring they persist even after the system is powered off.

Features

• Color Control: Adjust the intensity of the red, green, and blue channels of the RGB LED.
• Blinking Pattern Control: Set the interval and duration for the LED's blinking pattern.
• Interface: Navigate through settings using a rotary encoder, with visual feedback provided by an LCD display.
• Settings: Save your custom settings to EEPROM so they are preserved across power cycles.

Features

• Color Control: Adjust the intensity of the red, green, and blue channels of the RGB LED.
• Blinking Pattern Control: Set the interval and duration for the LED's blinking pattern.
• Interface: Navigate through settings using a rotary encoder, with visual feedback provided by an LCD display.
• Settings: Save your custom settings to EEPROM so they are preserved across power cycles.

Components

• Microcontroller (e.g., ESP32, Arduino)
• RGB LED
• Rotary Encoder with push-button
• LCD Display with I2C interface (20x4 characters)
• Resistors (as required)
• Wires and Breadboard

Pin Connections

• Rotary Encoder CLK => 32
• Rotary Encoder DT => 33
• Rotary Encoder SW => 25
• Red LED => 13
• Green LED => 12
• Blue => 26
• LCD SDA => Connect to I2C SDA
• LCD SCL => Connect to I2C SCL

How It Works

Normal Mode

• LED Control: The LED's color and blinking pattern are controlled based on the settings stored in EEPROM.
• Display: The LCD shows the current RGB values, blink interval, and duration.

Setup Mode

• Entering Setup Mode: Press the rotary encoder button to enter setup mode. The screen will display options to change the RED, GREEN, and BLUE values, as well as the blink interval and duration.
• Adjusting Values: Rotate the encoder to adjust the selected value. Press the button to move to the next setting.
• Saving Settings: After adjusting all values, the settings are saved to EEPROM automatically.

EEPROM Storage

• RED, GREEN, BLUE: Intensity values for each color channel.
• INTERVAL: Time (in tenths of a second) between blinks.
• DURATION: Time (in tenths of a second) the LED stays on during a blink

Code Overview

• setup(): Initializes the system, sets up pin modes, and loads settings from EEPROM.
• loop(): Handles the main program logic, including LED control, reading user input, and updating the display.
• ledlight(): Controls the RGB LED based on the current settings.
• lcdshow(): Updates the LCD display with the current settings or setup options.
• rotdial(): Handles rotary encoder input for adjusting settings.
• initsetting(), loadsetting(), savesetting(): Manage reading and writing settings to EEPROM.

Usage Instructions

1. Connect the Components: Assemble the circuit according to the pin connections described above.
2. Upload the Code: Flash the code to your microcontroller.
3. Power On: Once powered, the LCD will display the current RGB values and blinking settings.
4. Adjust Settings: Press the rotary encoder button to enter setup mode and adjust the settings to your preference.
5. Save and Use: The system will automatically save your settings, and the LED will behave according to your custom configuration.

Dependencies

• Arduino IDE: Used for compiling and uploading the code.
• EEPROM.h: For reading/writing persistent settings.
• Wire.h: For I2C communication with the LCD.
• LiquidCrystal_I2C.h: For controlling the I2C LCD.