I2c Interface Module | Pcf8574 Adapter for Lcd1602 Lcd2004 Displays

The I2C Interface Module (based on the PCF8574 I/O expander chip) allows standard LCD1602 and LCD2004 character displays to communicate via the I2C (Inter-Integrated Circuit) protocol using only two data lines (SDA & SCL). This module simplifies wiring and frees up digital pins on your Arduino, ESP32, STM32, or Raspberry Pi, making it ideal for compact or multi-sensor projects. It also includes a built-in contrast adjustment potentiometer and jumper-selectable I2C address, giving you complete control over multiple displays on one bus.