clcd.c

#include <LiquidCrystal.h>

LiquidCrystal lcd(13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3);

int row1Flag = 0;

void setup() {
  // put your setup code here, to run once:
  lcd.begin(16, 2);
  lcd.print("Hello!!");
  lcd.setCursor(0, 1);
  lcd.print("EdgeILAB");
  Serial.begin(115200);
}

void loop() {
  // put your main code here, to run repeatedly:
  String buffer = "";

  if(Serial.available() > 0) {
    buffer = Serial.readString();
  }

  // 두 줄에 걸쳐서 출력
  if(buffer != "") {
    if(row1Flag == 0) {
      lcd.clear();
      lcd.print(buffer);
      lcd.setCursor(0, 1);
      row1Flag = 1;
    }
    else {
      lcd.print(buffer);
      row1Flag = 0;
    }
  }
}