The 20×4 LCD Display with I2C Adapter is a convenient and compact solution for displaying real-time data in your Arduino or ESP-based project. Capable of showing 4 lines with 20 characters per line, this display provides excellent visibility and structure for sensor values, system messages, menus, and more.
Thanks to the I2C interface, it uses only two wires (SDA and SCL), reducing wiring complexity and saving precious digital I/O pins on your microcontroller. The module is based on the popular HD44780 driver, making it compatible with widely used libraries like LiquidCrystal_I2C.
Perfect for use in weather stations, data loggers, IoT dashboards, and DIY automation systems, this module also includes a backlight and an onboard potentiometer to adjust contrast easily.
⭐ Key Features:
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📟 Displays 80 characters across 4 lines (20×4)
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🔌 I2C interface – only 2 pins needed (SDA & SCL)
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🧠 Built-in HD44780 controller supported by popular Arduino libraries
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📦 Includes I2C backpack (PCF8574 chip) pre-soldered
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🔧 Adjustable contrast via onboard potentiometer
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💡 Backlit screen for easy readability in all lighting conditions
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🛠️ Saves GPIO pins on Arduino/ESP32/Raspberry Pi
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📱 Suitable for menu systems, sensor displays, IoT devices, and more
⚙️ Technical Specifications:
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Display Type: Character LCD
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Screen Size: 20 characters × 4 lines (20×4)
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Driver IC: HD44780
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I2C Driver IC: PCF8574 (on backpack)
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Operating Voltage: 5V DC
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Interface: I2C (SDA, SCL)
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I2C Address: Typically 0x27 or 0x3F (can be changed via jumper)
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Backlight: LED (Blue with White or Yellow-Green text depending on stock)
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Contrast Adjustment: Potentiometer (built-in)
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Dimensions (approx.): 98mm × 60mm × 14mm
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Compatible Platforms: Arduino, ESP32, ESP8266, Raspberry Pi, STM32, PIC
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Mounting: 4 holes for easy installation
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