//***************************************************************************
//*                                                                         *
//* NAME          : Saleem Abounaag                                         *
//* Program Name  : program.ino                                             *
//* Date          : 2023-03-21                                              *
//* Desc          : To use the Arduino Uno to control a RGB LED             *
//*                 To analog read data from a potentiometer                *
//*                 To connect and use an I2C bus LCD Display (16x2)        *
//***************************************************************************
#include <LiquidCrystal_I2C.h>                   // include LCD display libraries

#define I2C_ADDR    0x27                         // define address of the LCD
#define LCD_COLUMNS 16                           // define number of culumns for LCD
#define LCD_LINES   2                            // define number of lines for LCD

LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_LINES);   // make LCD project from the lines/columns defined

int redLED     = 6;                              // pin for red LED
int greenLED   = 5;                              // pin for green LED
int blueLED    = 3;                              // pin for blue LED
int redPOT     = A0;                             // pin for red POT
int greenPOT   = A1;                             // pin for green POT
int bluePOT    = A2;                             // pin for blue POT
int blueValue  = 0;                              // potentiometer value for blue
int redValue   = 0;                              // potentiometer value for red
int greenValue = 0;                              // potentiometer value for green




void setup() {

  lcd.init();                                    // start LCD display
  lcd.backlight();                               // turn on backlight for LCD display
  lcd.setCursor(0,0);                            // set cursor on LCD display
  lcd.print("kbag753");                          // starting print on LCD display

  pinMode(redLED, OUTPUT);                       // set red LED as an output
  pinMode(greenLED, OUTPUT);                     // set green LED as an output
  pinMode(blueLED, OUTPUT);                      // set blue LED as an output

  analogWrite(redLED,255);                       // turn off red LED
  analogWrite(greenLED,255);                     // turn off green LED
  analogWrite(blueLED,255);                      // turn off blue LED
  delay(2000);                                   // delay of 2 seconds for the user to read display
  lcd.setCursor(0,0);                            // set cursor on LCD display
  lcd.print("RED   GRN   BLU");                  // put headers for values on LCD display
}

void loop() {
  redValue   = analogRead(redPOT)/4;              // read red potentiometer and divide the value by 4 for the red LED value
  greenValue = analogRead(greenPOT)/4;            // read green potentiometer and divide the value by 4 for the green LED value
  blueValue  = analogRead(bluePOT)/4;             // read blue potentiometer and divide the value by 4 for the blue LED value
  analogWrite(redLED, redValue);                  // make the red RGB value to red LED
  analogWrite(greenLED, greenValue);              // make the green RGB value to green LED
  analogWrite(blueLED, blueValue);                // make the blue RGB value to blue LED

  lcd.setCursor(0,1);                             // set cursor on LCD display to (0,1)                              
  lcd.print(redValue);                            // put red RGB value on LCD

  lcd.setCursor(6,1);                             // set cursor on LCD display to (6,1)
  lcd.print(greenValue);                          // put green RGB value on LCD
 
  lcd.setCursor(12,1);                            // set cursor on LCD display to (12,1)
  lcd.print(blueValue);                           // put blue RGB value on LCD
  //end loop
}