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#include <LiquidCrystal.h>
#include <Wire.h>

//#include <LiquidCrystal_PCF8574.h>

//LiquidCrystal_PCF8574 lcd(0x27);
LiquidCrystal lcd(12, 11, 5, 4, 3, 2, BACKLIGHT_ON, POSITIVE);

void setup() {
lcd.begin(20,4);
lcd.setBacklight(255);
lcd.setCursor(0, 0);
lcd.print("hello world" );
Serial.begin(115200);

}

void loop() {
  // put your main code here, to run repeatedly:

}