#include <LiquidCrystal_I2C.h>  

/*
Name: Indervir Rai
Program Name: Arduino PWN LED Fader
Date: 2025-03-31
Program full description: To use the Arduino Uno to control a RGB LED, and
analog read data from a potentiometer.
*/


#define I2C_ADDR    0x27 //  defines I2C_ADDR
#define LCD_COLUMNS 16 // defines LCD_COLLUMS               
#define LCD_LINES   2 // defines LCD_LINES

int redPotPin = A0; 
int redPotentiometerValue;
int redValue;
int redPin = 11;

int greenPotPin = A1;
int greenPotentiometerValue;
int greenValue;
int greenPin = 10;

int bluePotPin = A2;
int bluePotentiometerValue;
int blueValue;
int bluePin = 9;



LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_LINES);


void setup() {
  lcd.init();
  lcd.backlight();
  lcd.setCursor(0,0);
  lcd.print("*LED FADER v1.0*");  
  delay(2000);
 
  lcd.setCursor(0,0);
  lcd.print("RED  GREEN  BLUE");
  
  pinMode(redPin,OUTPUT);
  pinMode(greenPin,OUTPUT);
  pinMode(bluePin,OUTPUT);



}

void loop() {
  redPotentiometerValue = analogRead(redPotPin); // read the value from the potentiometer
  redValue = map(redPotentiometerValue, 0, 1023, 0, 255); // this changes the reading to a 0-255
  analogWrite(redPin, redValue);
  lcd.setCursor (0,1); // move cursor to (0,1)
  lcd.print(redValue);
  lcd.print("   ");

  greenPotentiometerValue = analogRead(greenPotPin); // read the value from the potentiometer
  greenValue = map(greenPotentiometerValue, 0, 1023, 0, 255); // this changes the reading to a 0-255
  analogWrite(greenPin, greenValue);
  lcd.setCursor (6,1); // move cursor to (6,1)
  lcd.print(greenValue);
  lcd.print("   ");

  bluePotentiometerValue = analogRead(bluePotPin); // read the value from the potentiometer
  blueValue = map(bluePotentiometerValue, 0, 1023, 0, 255); // this changes the reading to a 0-255
  analogWrite(bluePin, blueValue);
  lcd.setCursor (12,1); // move cursor to (12,1)
  lcd.print(blueValue);
  lcd.print("   ");

}