LCD Character Modules are fundamental components in DIY electronics and embedded systems, providing a simple yet effective way to display textual information. These modules are commonly utilized in projects ranging from IoT devices and smart home automation to custom instrument interfaces, offering direct user feedback. Products were evaluated based on display size, interface simplicity, compatibility, user reviews, and feature analysis.
Hosyond 3pcs IIC I2C 2004 LCD Module 20x04 LCD Screen Module Display for Arduino Raspberry Pi
$16.99
The Hosyond 2004 LCD Module offers a larger 4-line display, providing more real estate for complex information compared to 16x2 options.
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GeeekPi 2-Pack I2C 1602 LCD Display Module 16X2 Character Serial Blue Backlight LCD Module for Raspberry Pi Arduino STM32 DIY Maker Project Nanopi BPI Tinker board Electrical IoT Internet of Things
$9.99
The GeeekPi 2-Pack 1602 LCD module provides excellent value with two units, making it cost-effective for multiple projects or replacements.
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Hosyond 3pcs IIC I2C 2004 LCD Module 20x04 LCD Screen Module Display for Arduino Raspberry Pi
$16.99
While not strictly premium, the Hosyond 2004 module's increased character capacity of 20x4 lines offers enhanced functionality for detailed displays, often preferred for more advanced projects.
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- 1602 LCD screen can display 2 lines x 16 characters, with i2c serial interface, blue display.
- Built-in independent potentiometer, backlight can be adjusted through the back potentiometer.
- Power supply: 5v; I2C address: 0x27; wiring method: GND—GND, VCC—VCC, SDA—A4, SCL—A5.
- Compatible with most development boards, such as Arduino, Raspberry pi, Tinkerboard, Nano pi, Banana pi, stm32, etc.
- Widely used in: Internet of Things, school electronics projects, smart buildings, maker DIY projects, etc., can display letters, characters, numbers, real-time clock or temperature.
- 2004 LCD screen can display 4 lines x 20 characters, with i2c serial interface, blue display.
- Compatible with most development boards, such as Arduino, Raspberry pi, Tinkerboard, Nano pi, Banana pi, stm32, etc.
- Power supply: 5v; I2C address: 0x27; wiring method: GND—GND, VCC—VCC, SDA—A4, SCL—A5.
- Built-in independent potentiometer, backlight can be adjusted through the back potentiometer.
- Widely used in: Internet of Things, school electronics projects, smart buildings, maker DIY projects, etc., can display letters, characters, numbers, real-time clock or temperature.
- EASY I2C WIRING & SETUP: Simplify your projects with the I2C serial interface, requiring only four connections: VCC, GND, SDA, and SCL. This significantly reduces wiring complexity compared to parallel LCDs, making it ideal for both beginners and advanced...
- CRISP 16X2 CHARACTER DISPLAY: Features a clear display capable of showing 2 lines of 16 characters each, perfect for displaying sensor data, status messages, or user menus. The vibrant blue backlight ensures excellent readability in various lighting...
- BROAD MICROCONTROLLER COMPATIBILITY: Engineered for versatility, this LCD module works seamlessly with a wide range of popular development boards. It is fully compatible with Arduino, Raspberry Pi, Tinkerboard, Nano pi, Banana pi, stm32, and other common...
- ADJUSTABLE BACKLIGHT AND CONTRAST: Easily fine-tune the display's readability using the built-in potentiometer on the rear of the module. This allows you to adjust the backlight brightness and character contrast to achieve the perfect viewing angle and...
- VERSATILE FOR DIY & STEM PROJECTS: An essential component for a variety of applications, including Internet of Things (IoT) devices, school electronics projects, smart building dashboards, and custom DIY maker projects. We provide comprehensive...
- EASY I2C WIRING & SETUP: Simplify your projects with the I2C serial interface, requiring only four connections: VCC, GND, SDA, and SCL. This significantly reduces wiring complexity compared to parallel LCDs, making it ideal for both beginners and advanced...
- CRISP 16X2 CHARACTER DISPLAY: Features a clear display capable of showing 2 lines of 16 characters each, perfect for displaying sensor data, status messages, or user menus. The vibrant blue backlight ensures excellent readability in various lighting...
- BROAD MICROCONTROLLER COMPATIBILITY: Engineered for versatility, this LCD module works seamlessly with a wide range of popular development boards. It is fully compatible with Arduino, Raspberry Pi, Tinkerboard, Nano pi, Banana pi, stm32, and other common...
- ADJUSTABLE BACKLIGHT AND CONTRAST: Easily fine-tune the display's readability using the built-in potentiometer on the rear of the module. This allows you to adjust the backlight brightness and character contrast to achieve the perfect viewing angle and...
- VERSATILE FOR DIY & STEM PROJECTS: An essential component for a variety of applications, including Internet of Things (IoT) devices, school electronics projects, smart building dashboards, and custom DIY maker projects. We provide comprehensive...
- LARGE I2C 20X4 CHARACTER DISPLAY MODULE – This I2C (TWI) 20x4 display shows up to 80 characters across four rows, making it perfect for displaying sensor data, logs, menus, or debug info in DIY electronics and Arduino projects.
- BLUE BACKLIGHT DISPLAY WITH ADJUSTABLE CONTRAST – Features a vibrant blue backlight LCD and onboard potentiometer to fine-tune contrast, ensuring excellent readability in low or bright lighting—ideal for both indoor and outdoor Arduino Uno R3 or ESP...
- I2C (TWI) COMMUNICATION TO SAVE PINS – Uses the I2C protocol (also known as TWI or Two-Wire Interface), which reduces the number of connections to just two signal wires—great for compact microcontroller setups using ESP8266, Raspberry Pi, and more.
- FULLY COMPATIBLE WITH ARDUINO UNO R3 / R4, ESP32, ESP8266, RASPBERRY PI – Works seamlessly with Arduino Uno R3, the latest Arduino Uno R4, Raspberry Pi boards, and MicroPython-based controllers. Ideal for makers, students, and engineers.
- ONLINE TUTORIALS INCLUDED – Easy-to-follow online guides walk you through setup, code examples, and integration with Arduino, ESP32, ESP8266, and Raspberry Pi. Just search: DIYables LCD 2004 I2C Display.
- Use the i2c protocol to reduce the occupation of I/O ports, making it easier to add to the project, and less wiring is more beautiful.
- Commonly used in: Internet of things, DIY project, home animation, smartbuilding, maker's DIY project.
- Compatible with all current development boards, such as Arduino, Raspberry pi, Tinkerboard, Nano pi, Banana pi, stm32 and so on
- With a potentiometer used to adjust backlight (Color: Blue) and contrast.Power supply: 5v and I2C address is: 0x27 Module dimension: 80mm x 35mm x 11mm
- 1PCS 40x2 4002 40*2 Character LCD Module Display Blue with Backlight for Arduino
- 40x2 character lcd module display
- Power Supply(Typ) 5.0V Supply Current for LCM(Max) 2200uA
- Operating Temperature -20℃~70℃ Storage Temperature -30℃~80℃
- HD44780 1602 LCD Display Module DC 5V Blue Blacklight
- 1602 LCD Display Module
- Can display 2-lines X 16-characters
- Commonly-used HD44780 controller is built in this 1602 LCD module
- Viewing area size: 64.5mm x 16mm
- LCD 1602: This module can display 2 lines of characters, with 16 characters per line
- I2C / IIC Interface: Saves a lot of ports compared to parallel interface (This new model integrates the conversion circuit, making it more stable)
- Detailed Tutorial: Provides step-by-step guide and detailed explanations (The download link can be found on the product box) (No paper tutorial)
- Compatible Models: Compatible with mainstream models of Arduino / Raspberry Pi / Raspberry Pi Pico / ESP32 / ESP8266, with example project and code (Other controllers are also compatible but without examples)
- Get Support: Our technical support team is always ready to answer your questions
This article is part of our complete guide Music & Instruments — browse all our comparisons and buying guides.
Last update on 2026-07-17 / Affiliate links / Images from Amazon Product Advertising API
How to Choose the Best LCD Character Modules
Display Size and Character Capacity
The primary distinction among LCD character modules is their display size, typically expressed as lines by characters. For instance, the Hosyond 3pcs I2C IIC 1602 module provides a 2-line by 16-character display, which is suitable for concise messages like sensor readings or menu navigation. In contrast, the Hosyond 3pcs IIC I2C 2004 module offers a 4-line by 20-character display, allowing for significantly more information to be presented simultaneously. When planning a project, consider the amount of text you need to convey; a 20x4 display, for example, can show status updates, time, and multiple sensor values concurrently, whereas a 16x2 might necessitate scrolling or abbreviated messages. Brands like hiBCTR also offer 16x2 configurations, making this a common choice for simpler applications.
Interface and Ease of Integration
Most modern LCD character modules, including those from GeeekPi and Hosyond, utilize the I2C (Inter-Integrated Circuit) serial interface. This protocol is highly advantageous as it significantly reduces the number of I/O pins required on your development board, typically needing only four wires (VCC, GND, SDA, SCL) instead of the dozen or more for a parallel interface. This reduction simplifies wiring and frees up valuable pins for other components in your project. In practice, modules like the GeeekPi 2-Pack I2C 1602 LCD are designed for quick integration, often with a pre-set I2C address (commonly 0x27) and clear wiring instructions, making them ideal for rapid prototyping with platforms like Arduino or Raspberry Pi.
Backlight and Visibility
The backlight feature is crucial for visibility, especially in low-light conditions. Modules are typically available with different backlight colors, blue being a very common option as seen in products from Hosyond and GeeekPi. Some modules, such as the Hosyond 3pcs I2C IIC 1602, feature a built-in independent potentiometer on the back, allowing users to manually adjust the backlight intensity. This can be particularly useful for optimizing power consumption or adapting the display to various ambient lighting environments. While most modules come with a fixed backlight color, GeeekPi offers options like the 2-Pack I2C 1602 LCD with a blue backlight and another with a yellow backlight, providing aesthetic choices depending on the project's visual requirements.
Controller and Compatibility
Compatibility with various development boards is a key factor. The listed LCD modules, including those from hiBCTR and GeeekPi, are widely compatible with popular platforms such as Arduino, Raspberry Pi, STM32, Tinkerboard, and Nano Pi. This broad compatibility stems from their use of industry-standard controllers, often an HD44780 equivalent, as explicitly stated for the hiBCTR 5 Pieces LCD1602 module. This standardized controller ensures that a wide array of existing libraries and code examples can be leveraged, significantly simplifying the software development process. Users typically find that these modules integrate seamlessly into their chosen ecosystem with minimal configuration, provided the correct libraries are installed and the I2C address is properly set.
Pros & Cons
Hosyond 3pcs IIC I2C 2004 LCD Module 20x04 LCD Screen Module Display for Arduino Raspberry Pi
Pros
- Offers a larger 20x4 character display, providing more information at a glance.
- Utilizes the I2C serial interface, significantly reducing wiring complexity.
- Broad compatibility with popular development boards like Arduino and Raspberry Pi.
Cons
- Lacks explicit mention of an adjustable backlight potentiometer.
- May consume slightly more power due to the larger display area.
Hosyond 3pcs I2C IIC 1602 LCD Display Module 16x02 LCD Screen Module for Arduino Raspberry Pi
Pros
- Features a convenient built-in potentiometer for backlight adjustment.
- Standard 16x2 character display is widely supported and easy to program.
- I2C interface minimizes I/O pin usage on the host microcontroller.
Cons
- Limited to 2 lines of text, which may require scrolling for more complex data.
- The blue display, while common, might not suit all aesthetic preferences.
GeeekPi 2-Pack I2C 1602 LCD Display Module 16X2 Character Serial Blue Backlight LCD Module for Raspberry Pi Arduino STM32 DIY Maker Project Nanopi BPI Tinker board Electrical IoT Internet of Things
Pros
- Comes as a 2-pack, offering good value for multiple projects.
- I2C protocol simplifies wiring and integration into projects.
- Broad compatibility with a range of development boards, including Raspberry Pi and STM32.
Cons
- The 16x2 display size can be restrictive for displaying extensive information.
- No explicit mention of an adjustable backlight feature.
Common Mistakes to Avoid
Incorrect I2C Address Configuration
A frequent issue encountered by users is failing to correctly identify or set the I2C address of their LCD module. While many Hosyond and GeeekPi modules default to 0x27, some batches or different manufacturers might use 0x3F. If your module isn't displaying anything, verifying the I2C address with a scanner sketch is a crucial first step before troubleshooting hardware.
Overlooking Display Size Requirements
Developers sometimes underestimate the amount of information they need to display, opting for a 16x2 module like the hiBCTR LCD1602 when a 20x4 module, such as the Hosyond 2004, would be more appropriate. This often leads to cramped text, excessive scrolling, or the need to abbreviate messages, compromising user experience.
Improper SDA/SCL Wiring
Despite the simplicity of I2C, incorrect connection of the SDA (Serial Data) and SCL (Serial Clock) lines is a common pitfall. For Arduino boards, SDA typically maps to A4 and SCL to A5, as specified for Hosyond modules. Reversing these connections will prevent communication, leading to a blank display. Always double-check your board's specific I2C pinout.
Neglecting Backlight Adjustment
Some modules, like the Hosyond 1602, include a built-in potentiometer for backlight adjustment. Users occasionally overlook this feature, struggling with displays that are too bright or too dim for their environment. Always check for and utilize these adjustment mechanisms to optimize visibility and power consumption.