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Product Introduction

Connecting LCD2004 to a microcontroller will occupy many IO ports. This module can directly drive LCD2004 with I2C interface. I2C only requires two ports, greatly saving the IO port resources of a single chip. There is also a potentiometer on the module to adjust the height of the LCD, which is very convenient to use.

Basic parameters

Supply voltage: 3-6V

Supports I2C protocol

Can be set by jumping to see if it comes with backlight

The contrast can be adjusted through a potentiometer

The I2C address of the device can be modified by short circuiting A1/A2/A3, and the default address is 0X3F or 0X70.

Product Features

Arduino is relatively easy to use. Below, we will use a module connected to an Arduino development board as an example to illustrate its usage. The usage of Arduino can be learned from Baidu, and compared to other development environments, it is very simple.

Open Arduino lDE and load two libraries, "one wire" and "LiquidCystaLI2c", which provide most of the functions required for LCD display, as well as sample programs.

Additional explanation:

1. Jumping function

Set the LCD backlight and connect it with a backlight.

2. Set I20 address

A0, A1, A2 are all suspended, and the device address is 0x3F or 0x27

Short circuit A0, device address 0x26

Short circuit A1, device address 0x25

Short circuit A2, device address 0x23

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