/*
***************************************************************
** Name: Christian Veselinovic                               **
** Project name: Arduino PWM LED Fader                       **
** Date: Sep 26                                              **
** Description: Light up an RGB led and                      **
**              use potentiometert to                        **
**              control color                                **
***************************************************************
*/

#include <LiquidCrystal_I2C.h>

#define I2C_ADDR  0x27         // set ip adress
#define LCD_COLUMNS 16          // assign # of columns for IDC display
#define LCD_LINES  2           // assign # of lines for ICD display

LiquidCrystal_I2C lcd (I2C_ADDR, LCD_COLUMNS, LCD_LINES);     // assigns values for IDC

int redLed = 6;           // set pin value for red led
int greenLed = 5;         // set pin value for green led
int blueLed = 3;          // set pin value for blue led

int redPot = A0;          // keep value for red Pot
int greenPot = A1;        // keep value for green Pot
int bluePot = A2;         // keep value for blue Pot

int red = 0;              // keep value for red led
int green = 0;            // keep value for green led
int blue = 0;             // keep value for blue led

void setup() {
  lcd.init();             // sets interface to ICD screen
  lcd.backlight();        // Turn onbackl light
  lcd.setCursor(0, 0);
  lcd.print("-LED FADER v1.0- ");   // Print title LED FADER on screen

  pinMode(redLed, OUTPUT);          // Make red led an output
  pinMode(greenLed, OUTPUT);        // Make green led an output
  pinMode(blueLed, OUTPUT);         // Make blue led an output

  analogWrite(redLed, 255);         // controls the amount of red color to change the leds color
  analogWrite(greenLed, 255);       // controls the amount of greem color to change the leds color
  analogWrite(blueLed, 255);        // controls the amount of blue color to change the leds color
  delay(2000);                      // wait
  lcd.setCursor(0, 0);
  lcd.print("RED   GRN   BLU  ");   // Print led colors

}

void loop() {
  red = (analogRead(redPot) / 4);      // creates an rgb value for red
  green = (analogRead(greenPot) / 4);  // creates an rgb value for green
  blue = (analogRead(bluePot) / 4);    // creates an rgb value for blue

  analogWrite(redLed, red );           // controls amount of red color
  analogWrite(greenLed, green );       // controls amount of green color
  analogWrite(blueLed, blue);          // controls amount of blue color

  lcd.setCursor(0, 1);                 // sets cursor column to 0 row 1
  lcd.print(red);                      // print red value

  lcd.setCursor(6, 1);                 // sets cursor column to 6 row 1
  lcd.print(green);                    // print red value

  lcd.setCursor(12, 1);                // sets cursor column to 12 row 1
  lcd.print(blue);                     // print red value


}