#include <LiquidCrystal_I2C.h>  

//*************************************************************************************************
//* Name     Rhys Miller                                                                          *
//* Program  PROGRAM #5- PWM LED Fader                                                            *
//* Date     March 21 2024                                                                        *
//* Desc     Adjustable RGB LED using potentiometers and displays RGB values on a I2C lcd display *
//*************************************************************************************************


// define LED display
#define I2C_ADDR    0x27    
#define LCD_COLUMNS 16                              
#define LCD_LINES   2  

// create led display with defined parameters
LiquidCrystal_I2C lcd(I2C_ADDR,LCD_COLUMNS, LCD_LINES);

// define LED pin numbers
int REDpin = 11;
int GREpin = 10;
int BLUpin = 9;

void setup() {
  // put your setup code here, to run once:

  // initialize LED Display
  lcd.init();
  lcd.backlight();
  lcd.setCursor(0,0);
  lcd.print("*LED FADER v1.0*");  
  delay(2000);
 
  // print RGB Colour Names to Display
  lcd.setCursor(0,0);
  lcd.print("RED  GREEN  BLUE"); 

  // set pin modes for LED Outputs
  pinMode(REDpin,OUTPUT);
  pinMode(BLUpin, OUTPUT);
  pinMode(GREpin, OUTPUT);
 
 // set pin modes for LED Inputs
 pinMode(A0, INPUT);
 pinMode(A1, INPUT);
 pinMode(A2, INPUT);
}

void loop() {
  // put your main code here, to run repeatedly:

  // create variables for RGB values
  int RED = (analogRead(A0)-3)/4; // make potentiometer input max 255
  int GRE = (analogRead(A1)-3)/4; // make potentiometer input max 255
  int BLU = (analogRead(A2)-3)/4; // make potentiometer input max 255

  analogWrite(REDpin,RED); // write RED value for RBG LED to REDpin
  analogWrite(GREpin,GRE); // write GREEN value for RGB LED to GREpin
  analogWrite(BLUpin,BLU); // write BLUE value for RGB LED to BLUpin

  lcd.setCursor(0,1);    // move cursor to second line
  lcd.print(RED);        // print red rgb value to lcd display
  lcd.setCursor(5,1);    // move cursour to next colour (Green)
  lcd.print(GRE);        // print green rgb value to lcd display
  lcd.setCursor(12,1);   // move cursor to next colour (Blue)
  lcd.print(BLU);        // print blue rgb value to lcd display
}