LED
LCD
20×4 Character LCD Display with I2C Interface
Product Overview
The 20×4 (2004) LCD Module from Pro Tronix is the professional choice for projects that require more information than a standard 16×2 screen can handle. With four full lines of text, you can display multiple sensor readings, complex menus, or system status updates simultaneously without the need for scrolling.
To make integration effortless, this module features a pre-soldered I2C Serial Adapter. Instead of occupying 6 to 10 digital pins on your Arduino or ESP32, this display uses only two pins (SDA & SCL). The board also includes a built-in potentiometer for contrast adjustment and a jumper for backlight control, providing a clean and efficient setup for any build.
Technical Specifications
| Feature | Specification |
| Display Capacity | 20 Characters x 4 Lines |
| Interface | I2C / IIC (Serial) |
| Controller | HD44780 / PCF8574 (I2C) |
| Operating Voltage | 5V DC |
| Backlight | Blue with White Text (or Yellow-Green with Black Text) |
| I2C Address | 0x27 or 0x3F (Default) |
| Module Dimensions | 98mm x 60mm x 12mm |
| Supplier | Pro Tronix |
Key Features
High Information Density: 80 characters of space allow for detailed professional interfaces.
I2C Connectivity: Reduces wiring complexity significantly, making it ideal for boards with limited I/O like the Arduino Nano.
Contrast Control: An onboard trimmer allows you to adjust the visibility of the text to suit your environment.
Robust Compatibility: Fully supported by the
LiquidCrystal_I2Clibrary for Arduino, as well as libraries for Raspberry Pi and ESP32.
Common Applications
3D Printers & CNCs: Displaying real-time coordinates, temperatures, and feed rates.
Environmental Monitoring: Simultaneously showing temperature, humidity, CO2 levels, and pressure.
Industrial Automation: Acting as a localized Human Machine Interface (HMI) for machine status.
Audio Equipment: Displaying track names, volume levels, and equalizer settings in DIY audio projects.
