// include the library code:
#include <Arduino.h>
#include <LiquidCrystal.h>

// initialize the library by associating any needed LCD interface pin
// with the arduino pin number it is connected to
const int rs = 12, en = 11, d4 = 5, d5 = 4, d6 = 3, d7 = 2;
LiquidCrystal lcd(rs, en, d4, d5, d6, d7);
char buffer_line1[16];
char buffer_line2[16];


void setup() {
	Serial.begin(115200);
	// set up the LCD's number of columns and rows:
	lcd.begin(16, 2);
	lcd.clear();
}

void loop() {
	while (Serial.available() == 0) {}
	lcd.clear();
	lcd.setCursor(0, 0);
	String s1 = Serial.readStringUntil('\n'); // This fixed performance issue
	int nl_idx = s1.indexOf("?", 0);
	if (nl_idx == -1) {
		lcd.print(s1);
	}
	else {
		String s2 = s1.substring(nl_idx+1, s1.length());
		s1 = s1.substring(0, nl_idx);
		lcd.print(s1);
		lcd.setCursor(0, 1);
		lcd.print(s2);
	}
}