LCD 2004 (20X4) – I2C – Green Display MakerBotics

Learn How to Use This LCD Display!

The LCD 2004, also known as the 2004 character-type liquid crystal display, is a dot matrix module designed to showcase letters, numbers, and characters. Its model number, 2004, signifies its capacity to display 2 lines of 16 characters. Featuring a green background, this display has garnered immense popularity due to its simplicity and adaptability across various applications.

Traditionally, the LCD 2004 employs SPI communication, which necessitates numerous pins. However, this variant utilizes I2C communication, requiring only 2 pins and thereby conserving a significant amount of digital I/O real estate on the microcontroller.

Specification

• Display Type: Character-type Liquid Crystal Display (LCD)
• Display Size: 20 characters x 4 lines
• Display Color: Green backlight
• Communication Interface: I2C
• Input Voltage: Typically 3-5V DC
• Operating Temperature: -20°C to +70°C
• Backlight: Typically LED backlight

Included

• LCD 2004 LCD display – Green with I2C module

Example Connection to Arduino Uno Microcontrollers:

Pinout Description:

• Arduino A4 Pin➡SDA on 1602 LCD
• Arduino A5 Pin ➡SCL on 1602 LCD
• Arduino 5V Pin ➡ VCC on 1602 LCD
• Arduino GND Pin➡GND on 1602 LCD

Power and Communication

The 2004 LCD display can be interfaced with either 3.3V or 5V compatible microcontrollers such as the ESP32, Teensy or Arduino microcontrollers without a need for a level shifting module. The LCD uses I2C communication and therefore you can use multiple screens on one microcontroller with the help of an I2C multiplexer.

Uses:

• Telemetry display
• Home automation
• Human-machine interfaces

Please Note:

• The I2C module comes with soldered headers for your convenience.

Resources:

To control this display, install the following libraries in the Arduino IDE

• Arduino 2004 LCD Library