Jhd-2x16-i2c: Proteus Exclusive

A2 A1 A0 → Device Address (7-bit) 0 0 0 0x20 (010 0000) 0 0 1 0x21 ...

Check the I2C address in your code. Try 0x20 if using the standard Proteus PCF8574 model. jhd-2x16-i2c proteus

For the JHD-2X16-I2C specifically, standard LiquidCrystal libraries might fail due to controller differences. A2 A1 A0 → Device Address (7-bit) 0