I2C LCD Adapter Module (Display Module)

The I2C LCD Adapter Module is a must-have breakout board designed to simplify the wiring of standard alphanumeric LCD displays (such as 1602 and 2004 character LCDs). By utilizing the I2C communication protocol, this module reduces the required pin count from 6 or more down to just 4 pins (VCC, GND, SDA, and SCL), freeing up valuable GPIO pins on your microcontroller like Arduino, ESP32, or Raspberry Pi.

Key Features

• Minimal Wiring: Connects standard parallel LCDs to microcontrollers using only 2 data pins (I2C interface).
• Built-in Potentiometer: Features an onboard contrast adjustment trimmer to easily set the display's readability.
• Backlight Control: Includes a jumper to control the LCD backlight programmatically or keep it constantly enabled.
• Address Selectable: Uses the PCF8574T (or PCF8574AT) I2C chip, allowing address changes via solder jumpers if using multiple modules.

Specifications

• Communication Protocol: I2C (TWI)
• Supply Voltage: 5V DC
• Default I2C Address: 0x27 or 0x3F
• Compatibility: Standard 16x2, 16x4, and 20x4 character LCD modules