// ****************************************
// *                                      *
// * NAME : Cayo Colin Carbonaro          *
// * Program name : LedFader.ino          *
// * DATE : 2023-02-13                    *
// * Desc : LED Fader with controlable    *
//*         color and displays values     *
// *                                      *
// ****************************************

#include <LiquidCrystal_I2C.h>.     // sets up the library

#define I2C_ADDR    0x27      // Configures the LCD display
#define LCD_COLUMNS 16      // Configures the LCD display
#define LCD_LINES   2     // Configures the LCD display

LiquidCrystal_I2C lcd (I2C_ADDR, LCD_COLUMNS, LCD_LINES);     //creates an "lcd" object with above defined parameters

int red = 6;      // sets a variable for the red pin
int green = 5;      // sets a variable for the green pin
int blue = 3;     // sets a variable for the blue pin
int redR = A0;      // sets a variable for the blue potentiometer
int greenR = A1;      // sets a variable for the green potentiometer
int blueR = A2;     // sets a variable for the red potentiometer



void setup() {
  pinMode(red, OUTPUT);     // configs the red pin to an OUTPUT
  pinMode(green, OUTPUT);     // configs the green pin to an OUTPUT
  pinMode(blue, OUTPUT);    // configs the blue pin to an OUTPUT
  
  lcd.init();     // initialize the lcd display
  lcd.backlight();      // initialize the lcd display
  
  lcd.setCursor(0, 0);      // sets the cursor to the top left
  lcd.print("*LED FADER v1.0*");      // displays title
  
  delay(1000);    // keeps title up for a second
  
  lcd.clear();    // Clears the title
}

void loop() {
  int redVal = analogRead(redR)/4;      // reads the red potentiometer and divides the value by 4
  int grnVal = analogRead(greenR)/4;      // reads the green potentiometer and divides the value by 4
  int bluVal = analogRead(blueR)/4;     // reads the blue potentiometer and divides the value by 4
  
  analogWrite(red, redVal);     // pulses the red wire at the rate of redVal
  analogWrite(green, grnVal);     // pulses the red wire at the rate of grnVal
  analogWrite(blue, bluVal);      // pulses the red wire at the rate of bluVal
  
  lcd.print("Red   Grn   Blu ");    // displays on the top of lcd the names of the colors

  lcd.setCursor(0, 1);    // sets the cursor to column 1, line 2
  lcd.print(redVal);      // displays redVal
  
  lcd.setCursor(6, 1);      // sets the cursor to column 7, line 2
  lcd.print(grnVal);      // displays grnVal

  lcd.setCursor(12, 1);     // sets the cursor to column 13, line 2
  lcd.print(bluVal);      // displays blueVal

  lcd.print("   ");     // adds space to make display un cluterd
  delay (100);    // delay for 1 tenth of a second
} // ends loop