02 Sensor & Display

#include <LiquidCrystal.h>

const int rs = 12, en = 11, d4 = 5, d5 = 4, d6 = 3, d7 = 2;
LiquidCrystal lcd(rs, en, d4, d5, d6, d7);

void setup(){
  lcd.begin(16, 2);
  lcd.print("hello, world!");
  delay(2000);
  lcd.clear();
}

void loop(){
  lcd.setCursor(0, 0);
  lcd.print("time : ");
  lcd.print(millis() / 1000);
  char second = 's';
  lcd.print(second);
}