---
product_id: 259234676
title: "SunFounder IIC I2C TWI Serial 2004 20x4 LCD Module Shield Compatible with Arduino R3 MEGA (IIC 2004)"
brand: "sunfounder"
price: "104 zł"
currency: PLN
in_stock: true
url: https://www.desertcart.pl/products/259234676-sunfounder-iic-i2c-twi-serial-2004-20x4-lcd-module-shield
store_origin: PL
region: Poland
---

# I2C interface saves I/O 20x4 char display Adjustable contrast SunFounder IIC I2C TWI Serial 2004 20x4 LCD Module Shield Compatible with Arduino R3 MEGA (IIC 2004)

**Brand:** sunfounder
**Price:** 104 zł
**Availability:** ✅ In Stock

## Summary

> 📟 Upgrade your Arduino game with sleek, smart display power!

## Quick Answers

- **What is this?** SunFounder IIC I2C TWI Serial 2004 20x4 LCD Module Shield Compatible with Arduino R3 MEGA (IIC 2004) by sunfounder
- **How much does it cost?** 104 zł with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/259234676-sunfounder-iic-i2c-twi-serial-2004-20x4-lcd-module-shield)

## Best For

- sunfounder enthusiasts

## Why This Product

- Trusted sunfounder brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Minimal Pin Usage:** Only 2 I/O pins needed thanks to efficient I2C interface—free up your Arduino for more.
- • **Customizable Visuals:** Easily tweak contrast with built-in potentiometer or disable backlight for power saving.
- • **Elevate Your Projects:** Transform basic builds into interactive, professional-grade displays that impress.
- • **Plug & Play Compatibility:** Seamlessly integrates with Arduino R3 and MEGA boards for rapid prototyping.
- • **Crystal Clear 20x4 Display:** Showcase 80 characters in vivid blue & white for ultimate clarity.

## Overview

The SunFounder IIC I2C TWI Serial 2004 LCD Module Shield offers a 20x4 character display with an energy-efficient I2C interface requiring only two Arduino pins. Featuring adjustable contrast and optional backlight control, it’s designed for seamless compatibility with Arduino R3 and MEGA boards, making it the perfect tool to add vivid, customizable visual output to your electronics projects.

## Description

IIC I2C TWI Serial 2004 20x4 LCD Module Shield Compatible with Arduino R3 MEGA (IIC 2004)

## Features

- Sunfounder I2C LCD 2004 displays characters of 4 rows with 20 characters in each
- You can adjust the contrast by the potentiometer at its back.If you don't want the backlight, you can also unplug the jumper cap at the LCD back
- IIC/I2C interface; only takes two I/O ports
- Compatible with Arduino R3/MEGA board
- With this LCD Module Shield, you can display whatever you want by programming the board.It is a perfect choice to make your project more interesting and vivid

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | SunFounder |
| Product Dimensions | 19.05 x 12.7 x 0.51 cm; 86.4 g |
| Item model number | 8541582407 |
| Manufacturer | SunFounder |
| Series | 8541582407 |
| Color | IIC2004-Red |
| Standing screen display size | 3 Inches |
| Processor Count | 1 |
| Voltage | 5 Volts |
| Operating System | Linux |
| Are Batteries Included | No |
| Item Weight | 86.4 g |

## Product Details

- **Brand:** SunFounder
- **Model name:** 8541582407
- **Connectivity technology:** I2C
- **Operating system:** Linux
- **Processor count:** 1

## Images

![SunFounder IIC I2C TWI Serial 2004 20x4 LCD Module Shield Compatible with Arduino R3 MEGA (IIC 2004) - Image 1](https://m.media-amazon.com/images/I/71MzP4CZQtL.jpg)

## Available Options

This product comes in different **Color** options.

## Questions & Answers

**Q: It it possible to change the address of the lcd to have multiple lcd on the same bus?**
A: To further expand on Wes' answer (which is excellent!), you can have up to eight (8) on the same bus, per the chip datasheets. The chips have a portion of the address hard-code (which cannot be changed) and the three remaining address lines (A0, A1, and A2) can be jumpered to ground to set seven (7) other addresses - the 8th being no jumpers. IF you happen to get one with an 8574 chip and another with 8574A or 8574T, then you could potentially have up to 16 modules on the same bus as the A and T versions use a different hard-coded address than the 8574.

**Q: Has anyone run this display on 3.3 volts successfully? I'd like to use it on an 8266-12E to display the ip address.**
A: It works on 3.3V, but just barely: it's unusably dim. I changed the supply voltage to 5V and was able to successfully drive it with 3.3V-level I2C signals, although the PCF8574 data sheet says that the minimum Vih level is 0.7 * Vcc = 3.5V. My scope says that the signals are rising to about 3.8V, so there must be some kind of pull-up to 5V on the I2C backpack board. I don't want to rely on that, so for my final design I'll use a PCA9306 I2C level shifter.

**Q: Do these come with an I2C backpack?  I just ordered some of these and they came with no backpack in the package.**
A: There are several product options on the page, some have I2C, some don't. If you chose one that has I2C, it should come with an I2C backpack.

**Q: Does this work for the old raspberry pis that have a 26 pin gpio?**
A: This module uses an i2c serial interface rather than discrete gpio pins.  If your rpi has an i2c, it should work.

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*Product available on Desertcart Poland*
*Store origin: PL*
*Last updated: 2026-03-18*