Proteus | Jhd-2x16-i2c

Adjust the contrast pot on the virtual LCD if necessary (though rarely needed in simulation).

An address mismatch between the compiled firmware configuration and the hardware pin configuration of A0, A1, and A2 on the PCF8574.

In Proteus, double-click the PCF8574 component to open its properties. Ensure the property fields reflect your intended hex address prefix. Simulation Firmware (Arduino Code Example) jhd-2x16-i2c proteus

Which are you using to generate your hex file?

This article provides a complete walkthrough for setting up, wiring, and programming the JHD-2X16-I2C display within Proteus ISIS. Understanding the JHD-2X16-I2C Hardware Adjust the contrast pot on the virtual LCD

A small daughterboard attached to the back of the LCD, typically powered by the PCF8574 (or PCF8574T/AT) 8-bit I/O expander chip. This chip converts the serial I2C data from a microcontroller into parallel data for the LCD. Default I2C Addresses

Here is an example of a complete, functional schematic connection in Proteus: Ensure the property fields reflect your intended hex

Search for RES (2 pieces needed for the I2C bus lines). 2. Wiring the Hardware Connections