An electronic circuit based on (Arduino Nano China) is designed and D2,D3 is customized for I2C Arduino Serial Module for LCD and it is difficult to modify the hardware
We just want to modify the software to fit the scheme
I found his library LiquidCrystal_Software_I2C I set pins the pins
#include <LiquidCrystal_Software_I2C.h>
LiquidCrystal_I2C lcd(0x27, 16, 4, 2, 3);
Unfortunately, it has a problem in dealing with the screen size 16X4
I decided to replace it with hd44780 library
That's it