IIC/I2C Interface for 1602 LCD Module for Arduino Projects Take control of your 1602 LCD 


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1 × LCD12864 LCD Screen Display

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LCD1602 16×2 3.3v Blue LCD Display
Qty Discount
2 - 4 5%
5 - 9 6.5%
10 + 8%
SKU: OKY3437
Additional information
Support & Utility
Q & A


The IIC/I2C INTERFACE FOR 1602 LCD MODULE, such as our TA0170/TA020 require 7 IO pins to be driven from Arduino.

This interface when connected to the 1602 module only requires 2 IO pins, freeing up pins to be used with other modules.

I2C is a serial protocol for a two-wire interface to connect low-speed devices like microcontrollers, EEPROMs, A/D and D/A converters, I/O interfaces and other similar peripherals in embedded systems.

The initial I2C specifications defined a maximum clock frequency of 100 kHz.


  • Supply voltage: 2.5 – 6V
  • Support I2C protocol.
  • Backlight power control, you can set the jumper cap to connect the backlight power supply.
  • Plugin the jumper cap can connect the backlight power, unplug it can disconnect the backlight.
  • Contrast is adjustable, rotate blue potentiometer, clockwise to enhance, counterclockwise to weaken.
  • The potentiometer is designed in the front, which is convenient for customers to adjust freely.
  • Modules can be cascaded, up to 8 cascaded.
  • Modify the device address via short circuit A0 / A1 / A2. The default address is 0 x 27
  • For all standard 5V 16 Chars, 2 Lines and 20 Chars, 4 Lines LCD
  • PCF8574T Driver
  • Connector Pins: SDA / SCL / VCC / GND
  • Arduino-Library Liquid Crystal_I2C is available.
  • Size: 40mm x 18mm

Package included:  1x IIC/I2C INTERFACE FOR 1602 LCD MODULE NOTE (LCD screen not included)

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1. There may be slight size deviations due to manual measurement, different measuring methods and tools.
2. The picture may not reflect the actual colour of the item because of different photographing light, angles and display monitors.

Weight 0.005 kg
Dimensions 6 × 2 × 1 cm

Product Applications

This is another great IIC/I2C/TWI/SPI Serial Interface. As the pin resources of the Arduino controller is limited, your project may be not able to use a normal LCD shield after being connected with a certain quantity of sensors or SD card. However, with this I2C interface module, you will be able to realize data display via only 2 wires. If you already have I2C devices in your project, this LCD module actually cost no more resources at all. It is fantastic for Arduino based projects.

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