Product Description

1602 LCD with soldered I²C module (pre-assembled) – a simple and tidy solution to add text display to your projects. With the I²C interface already mounted on the back of the screen, you only need 4 wires (VCC, GND, SDA, SCL), with no extra data/control pins. The display is HD44780-compatible, offers 2 lines of 16 characters each, an on-board contrast trimmer, and controllable backlight. Ideal for Arduino/GroundStudio, ESP8266/ESP32, Raspberry Pi, and other I²C-compatible platforms.

Technical Details

• Display format: 16 characters × 2 lines (5×8 dot matrix per character)
• Controller: HD44780 or compatible
• Interface: I²C via PCF8574 expander (or equivalent)
• Supply voltage: 5 V DC recommended
• Typical current: ~20–30 mA (depending on backlight)
• Backlight: LED, can be enabled/disabled (backlight jumper on the module)
• Contrast adjustment: trimmer potentiometer on the module
• I²C speed: up to 100 kHz (Standard Mode)
• I²C address: usually 0x27 or 0x3F (configurable via A0/A1/A2 jumpers on the module)
• Connectors:
  • I²C: GND, VCC, SDA, SCL
• Dimensions: standard 1602 footprint (approx. 80 × 36 mm; mounting holes on the PCB)
• Compatibility: Arduino/GroundStudio boards (Uno, Nano, Mega, etc.), ESP8266/ESP32, Raspberry Pi, etc.

Note: Although many setups can work at 3.3 V, 5 V is recommended for optimal contrast and brightness.

Wiring & Code Example (Arduino)

Quick Connections

• VCC → 5V
• GND → GND
• SDA →
  • Arduino Uno/Nano: A4
  • Arduino Mega: D20 (SDA)
• SCL →
  • Arduino Uno/Nano: A5
  • Arduino Mega: D21 (SCL)

Demo Code (LiquidCrystal_I2C)

 #include <Wire.h> 

#include <LiquidCrystal_I2C.h>

// Change the address to 0x3F if 0x27 doesn't work

LiquidCrystal_I2C lcd(0x27, 16, 2);

void setup() {

  lcd.init();          // initialize the LCD

  lcd.backlight();     // turn on the backlight

  lcd.clear();

  lcd.setCursor(0, 0);

  lcd.print("Hello, Ardushop!");

  lcd.setCursor(0, 1);

  lcd.print("LCD 1602 I2C :)");

}

void loop() {

  // update the text here as needed

}

Tips:

• If nothing appears on the screen, gently rotate the contrast trimmer.
• If text still doesn’t show, try the other address (0x27 ↔ 0x3F).
• For other boards (e.g., ESP32), use the board’s dedicated I²C pins and set SDA/SCL correctly.

Package Contents

• 1 × 1602 LCD with pre-soldered I²C module (ready to use)