#include <Wire.h>
#include <LiquidCrystal_I2C.h>

// Definiciones para pines
#define ledRojo 45
#define ledAzul 40
#define potent 6
#define I2C_SDA 1
#define I2C_SCL 2
#define pinSwitch 7

// Declaramos variables y objetos
int counter =1;
int led255;
int antled;
int dutyled;
LiquidCrystal_I2C miLCD(0x27, 16, 2);
bool lastStateSwitch;

void setup() {
  // Reconfiguramos pines para I2C
  Wire.begin(I2C_SDA, I2C_SCL);
  // Configuramos pines para led RGB
  pinMode(ledRojo, OUTPUT);
  pinMode(ledAzul, OUTPUT);
  pinMode(pinSwitch, INPUT_PULLUP);
  // Inicializamos la pantalla LCD
  miLCD.init();
  miLCD.backlight();
  miLCD.setCursor(1, 0);
  miLCD.print("P: ");
  miLCD.setCursor(6, 0);
  miLCD.print("%");
  // Inicializamos variables
  antled = 256;

  lastStateSwitch = digitalRead(pinSwitch);
}

void loop() {
  if(lastStateSwitch == HIGH && digitalRead(pinSwitch)==LOW){
    counter++;
    delay(20);
    if(counter==3){
      counter=1;
    }
  }
  lastStateSwitch = digitalRead(pinSwitch);

    led255 = map(analogRead(potent), 0, 4095, 0, 255);
    if(led255 != antled){ 
      if(counter==2){
        analogWrite(ledRojo, led255);
        analogWrite(ledAzul, 0);       // actualizamos ciclo de trabajo
      }
      else{
        analogWrite(ledAzul, led255); 
        analogWrite(ledRojo, 0);
      }
      dutyled = led255*100/255;         // calculamos ciclo de trabajo en porcentaje  
      miLCD.setCursor(3, 0);              // mostramos en pantalla
      miLCD.printf("%03d", dutyled);
    }
    antled = led255;

  delay(100); // this speeds up the simulation
}