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

int Planta1 = 0;
int Planta2 = 0;
int Planta3 = 0;

const int izq = 8;
const int der = 7;

int valI = 0;
int valD = 0;

LiquidCrystal_I2C lcd(0x27, 20, 4);

void setup() {
  pinMode(izq, INPUT);
  pinMode(der, INPUT);
  lcd.init();
  lcd.backlight();
}

void loop() {
  Planta1 = map(analogRead(A0), 0, 1023, 0, 100);
  Planta2 = map(analogRead(A1), 0, 1023, 0, 100);
  Planta3 = map(analogRead(A2), 0, 1023, 0, 100);
  lcd.clear();
  delay(500);
  lcd.setCursor(0, 0);
  lcd.print("Planta 1 =");
  lcd.setCursor(12, 0);
  lcd.print(Planta1);
  lcd.setCursor(17, 0);
  lcd.print("Planta 2 =");
  lcd.setCursor(28, 0);
  lcd.print(Planta2);
  lcd.setCursor(33, 0);
  lcd.print("Planta 3 =");
  lcd.setCursor(44, 0);
  lcd.print(Planta3);
  valI = digitalRead(izq);
  valD = digitalRead(der);
  if ( valI == HIGH) {
    for (int i = 0; i == 16; i++) {
      lcd.scrollDisplayLeft();
      delay(100);
    }
  } else {}
  if (valD == HIGH) {
    for (int p = 0; p == 16; p++) {
      lcd.scrollDisplayRight();
      delay(100);
    }
  } else {}

}