Hello guys !  Im try to  using i2c communicate with module  LCD 16x02_I2C_PCF8574 but it not work !!! Im using library : LiquidCrystal_I2C.h . but not work and i try porting library from Arduino to Engeria and it not work too. maybe im using library same as this topic :  Someone can help me solved this problem or share with me a library work  ... many thanks !