Connect the data pins (P4–P7) of the PCF8574 to the LCD's data pins (D4–D7). Connect the Control pins (RS, RW, E) to the PCF8574's P0–P2 pins.

The most critical aspect of simulation is the I2C address.

Proteus - Jhd-2x16-i2c

Connect the data pins (P4–P7) of the PCF8574 to the LCD's data pins (D4–D7). Connect the Control pins (RS, RW, E) to the PCF8574's P0–P2 pins.

The most critical aspect of simulation is the I2C address. jhd-2x16-i2c proteus