LiquidCrystal_I2C lcd(0x27, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE);
You can't use the Serial port pins for the LCD and for Serial, unless you WANT weird problems. If you do, don't whine when they happen.
LiquidCrystal_I2C lcd(0x27, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE);
You can't use the Serial port pins for the LCD and for Serial, unless you WANT weird problems. If you do, don't whine when they happen.