#include <Wire.h> // needed for LCD with PCF8574 port expander
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 20, 4);

void setup()
{
  // Wire.begin(6, 7);
  lcd.init();
  lcd.backlight();
  lcd.setCursor(1, 0);
  lcd.print("Hello, world !");
  lcd.setCursor(2, 1);
  lcd.print("ESP32-C3 I2C");
}

void loop()
{
  delay(100);
}