I2C Serial Interface Adapter Module for 16x2 (1602) Character LCD

The I2C Serial Interface Adapter Module is a compact and efficient add-on that simplifies the connection of a 16×2 (1602) Character LCD to microcontrollers. Instead of using multiple digital pins, this module enables communication via the I2C protocol using only two wires—SDA and SCL—greatly reducing wiring complexity and saving valuable microcontroller pins.

Built around the reliable PCF8574 I/O expander chip, the module ensures stable and efficient performance while keeping your project neat and easy to debug. An onboard potentiometer allows for adjustable LCD contrast, and a jumper provides optional control of the backlight. Its standard 4-pin header (VCC, GND, SDA, SCL) makes integration straightforward, and the I2C address can be configured via solder jumpers, typically set to 0x27 or 0x3F.

This module is compatible with 16×2 and 20×4 LCD displays and works seamlessly with Arduino, Raspberry Pi, ESP8266, ESP32, STM32, PIC, and AVR microcontrollers. It is ideal for users who want to maximize microcontroller pins and maintain a clean, professional-looking circuit.

Common applications include Arduino and microcontroller projects, IoT devices, home automation interfaces, robotics control panels, educational STEM electronics, and prototype display systems.

Choosing the I2C Serial Interface Adapter simplifies LCD wiring, saves microcontroller pins, and improves project efficiency. Its ease of use, reliability, and compatibility make it an essential accessory for any LCD-based project.