I2C LCD Adapter Module

The I2C LCD Adapter Module is designed to simplify connections between a character LCD (like 16x2 or 20x4) and microcontrollers by using only two data pins (SDA and SCL) via the I2C protocol. This module drastically reduces wiring complexity and is compatible with Arduino, ESP32, ESP8266, Raspberry Pi, and other I2C-supported development boards.

With built-in PCF8574 I/O expander IC, it allows easy control of LCDs while freeing up GPIO pins. A contrast adjustment potentiometer is included, along with an address jumper for flexible I2C addressing.

🔧 Features:

• Compatible with 16x2 and 20x4 character LCDs

• Uses I2C communication (only SDA & SCL)

• Operating voltage: 5V

• PCF8574 I/O expander chip

• Onboard contrast adjustment potentiometer

• Adjustable I2C address via jumper

• Reduces GPIO pin usage from 6+ to 2

🎯 Applications:

• Arduino projects with LCD display

• DIY electronics with limited pins

• ESP32/ESP8266 displays

• IoT and embedded systems

• Robotics and data loggers with display