sketch_lcd

/*
 LiquidCrystal Library - Hello World
 Demonstrando o uso de um display LCD 16x2. A biblioteca LiquidCrystal
 funciona com todos os displays LCD que forem compativeis com o driver
 Hitachi HD44780.
 
 Esse programa imprime "Hello World!" no LCD
 
 O circuito:
 - LCD RS: digital 12
 - LCD Enable: digital 11
 - LCD D4: digital 5
 - LCD D5: digital 4
 - LCD D6: digital 3
 - LCD D7: digital 2
 - LCD R/W: Ground (Terra)
 - Resistor de 10k
 - +5v a Ground (Terra)
 - LCD VO: digital 3
*/
#include <LiquidCrystal.h>

LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
String message;

void setup() {
  Serial.begin(9600);
  Serial.println("Serial conection started, waiting for instruction");
  lcd.begin(16, 2);
}

int getX(int x) {
  if (x == 15) {
    return 0;
  }
  return x+1;
}

int getY(int x, int y) {
  if (x == 15 && y == 1) {
    lcd.begin(16, 2);
    return 0;
  } else if (x == 15 && y == 0) {
    return 1;
  }
  return y;
}

void loop() {
  while (Serial.available() == 0) {
  }
  lcd.begin(16, 2);
  message = Serial.readString();
  int index = 0;
  int x = 0;
  int y = 0;
  while (index < message.length()) {
    lcd.setCursor(x, y);
    lcd.print(message.charAt(index));
    index += 1;
    y = getY(x, y);
    x = getX(x);
    delay(125);
  }
}