So i have two LCD whit i2c backpack and i scan i2c adresses for the first one is 0x3F and the second one is 0x27 .
the contrast is setted good (i think)
i copyed a i2c lcd code but my lcd is a chinise cheap lcd and didint work whit thehe codes.
i dont no what i do now.
i need sole this problem for next monday. 