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Product Brief Introduction

Connecting LCD2004 to a microcontroller will occupy many IO ports. This module can directly drive LCD2004 with I2C interface, while 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 brightness of the LCD, which is very convenient to use.

Product 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 Ox70

Product Use

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.

1. Open Arduino lDE and load two libraries, "one wire" and "LiquidCrystalline I2c", 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 the 12C 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

Product Special Note

1. Pay attention to wiring according to the diagram and do not make mistakes

2. This document only represents the product parameters at the time of editing, and any changes in the future will not be notified separately.

3. There are two types of main control chips: PCF8574AT and PCF8574T.

4. The screen printing of the main control chip is PCF8574AT, and the corresponding I2C address is 0x3F

5. The screen printing of the main control chip is PCF8574T, corresponding to an I2C address of 0x70.

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