#include <LiquidCrystal.h>

// Pines del LCD
const int rs = 12, en = 11, d4 = 5, d5 = 4, d6 = 3, d7 = 2;
LiquidCrystal lcd(rs, en, d4, d5, d6, d7);

#define R 6
#define G 7
#define B 8
#define btnA 1

int Color = 0;          
int ColorAnterior = -1;
int ValorP = 0;

void setup() {
  lcd.begin(16, 2); // Inicializar LCD 16x2
  pinMode(R, OUTPUT);
  pinMode(G, OUTPUT);
  pinMode(B, OUTPUT);
  pinMode(btnA, INPUT);

  lcd.clear(); 
  lcd.setCursor(0, 0);
}

void loop() {
  ValorP = analogRead(A0); 

  if (digitalRead(btnA) == 1) {
    delay(200); 
    Color = (Color + 1); 
    if (digitalRead(Color)>3){
      Color=0;
    }
  } 
  if (digitalRead(btnA) == 0) {
    Color=0;
  }

  if (Color != ColorAnterior) {
    if (Color == 1) {       // Rojo
      digitalWrite(R, HIGH);
      digitalWrite(G, LOW);
      digitalWrite(B, LOW);
      lcd.setCursor(0, 1);
      lcd.print("Color: Rojo   ");
    } 
    else if (Color == 2) {  // Verde
      digitalWrite(R, LOW);
      digitalWrite(G, HIGH);
      digitalWrite(B, LOW);
      lcd.setCursor(0, 1);
      lcd.print("Color: Verde  ");
    } 
    else if (Color == 3) {  // Azul
      digitalWrite(R, LOW);
      digitalWrite(G, LOW);
      digitalWrite(B, HIGH);
      lcd.setCursor(0, 1);
      lcd.print("Color: Azul   ");
    } 
    else {                  
      digitalWrite(R, LOW);
      digitalWrite(G, LOW);
      digitalWrite(B, LOW);
      lcd.setCursor(0, 1);
      lcd.print("Color: Apagado");
    }    
  }
  lcd.setCursor(0, 0);
  String mensaje = "Intensidad: " + String(ValorP);
  lcd.print(mensaje + "     "); 
  
  delay(100);
}