I2C Module for 16×2 (1602) Character LCD

The I2C Module for 16×2 Character LCD is a compact serial interface board that simplifies the connection of a standard 1602 LCD display by converting its parallel interface to I2C (2-wire). It dramatically reduces the number of required GPIO pins from 6–8 down to just 2 (SDA and SCL), making it perfect for microcontrollers with limited I/O like Arduino, ESP8266, ESP32, and Raspberry Pi.

This module is based on the PCF8574 I/O expander and includes a built-in potentiometer for contrast adjustment and a jumper for backlight control. It’s ideal for displaying sensor data, menus, messages, or any textual information in your embedded or IoT projects.

Key Features:

• Converts 1602 LCD to I2C interface (SDA & SCL)
• Built-in PCF8574 I/O expander chip
• Reduces GPIO usage (from 6–8 to 2 pins)
• Onboard contrast adjustment potentiometer
• Backlight enable/disable jumper
• Operating voltage: 5V
• I2C address configurable via solder jumpers
• Compatible with Arduino, ESP32, Raspberry Pi, STM32, and more

Applications:

• Display module for Arduino projects
• Sensor readouts and real-time data display
• Home automation systems
• Robotics and embedded control panels
• DIY electronics and maker projects