0.49″ OLED Display for D1 Mini and C3 Mini – I2C Adapter Kit (DIY/PRO)

0.49″ OLED Display I2C Adapter for D1 Mini and C3 Mini Projects

The 0.49″ inch OLED Display 64×32 I2C Connector Kit is the space-saving solution for status and measurement displays in your own microcontroller projects. With the matching I2C adapter, it can be connected directly and without additional wiring to WEMOS D1 Mini and C3 Mini boards. You decide how much assembly you want to take on: as individual parts, as a DIY kit for self-soldering, or as a fully pre-assembled PRO version for direct plug-in.

Who Is This Product For?

The display is aimed at makers looking for a compact status display for their D1 Mini or C3 Mini projects – for example, for sensor values, IP addresses, times, or simple menus. Those who already solder and want full flexibility can choose the display or adapter individually, or the DIY kit. Those who want to get started immediately without soldering can choose the PRO version.

Description

The 0.49″ inch OLED Display 64×32 I2C Connector Kit is based on the proven SSD1306 driver chip and offers a resolution of 64×32 pixels in high-contrast white on a black background. Thanks to the I2C interface, the display requires only four connections (GND, VCC, SCL, SDA) and can be controlled immediately using common Arduino, ESP32, and ESP8266 libraries.

The separately available I2C adapter is designed as a connector PCB and aligns the I2C pins of the display and microcontroller board with each other. This eliminates loose wiring on the D1 Mini and C3 Mini – the display sits mechanically stable directly above the board.

With the DIY kit, you get the display and adapter together as a kit, with all parts unsoldered. This lets you decide for yourself the orientation and height at which the display should sit. The PRO version (Comfort Line), on the other hand, is already fully pre-soldered and ready to use – simply plug it onto the D1 Mini or C3 Mini, done.

The 4 Variants at a Glance

Technical Specifications

Comparison of the Mini OLED Displays

In addition to the 0.49″ OLED display, we also offer the 0.42″ OLED display. Both modules look similar on the outside but differ in display size, resolution, and mechanics – the following table shows an overview of the differences.

Note for Customers Although both displays look similar on the outside and are often offered with an SSD1306-compatible controller, they differ in display size, resolution, and mechanical dimensions. Please make sure to select the correct display size when reordering.

• 0.49″ OLED, 64 x 32 Pixels
• 0.42″ OLED, 72 x 40 Pixels

Compatibility

• WEMOS D1 Mini / LOLIN D1 Mini
• C3 Mini platform
• All Microcontrollers with I2C Interface (Arduino, ESP32, ESP8266, STM32)
• Common OLED Libraries (Adafruit SSD1306, U8g2, and others)

Connection / Integration

For the display and adapter purchased separately, the connection is made via four I2C lines (GND, VCC, SCL, SDA), which you can wire or solder freely depending on your project. With the DIY kit, you connect the display and adapter into a fixed unit by soldering them yourself. With the PRO version, this connection is already made at the factory – simply plug the finished module onto the I2C pins of the D1 Mini or C3 Mini and you’re ready to go. You can find matching accessories such as additional shields in our category: 👉 Discover OLED Displays.

Package Contents

The package contents depend on the selected variant:

• Display Module: 1x 0.49″ OLED Display
• I2C Adapter: 1x Connector PCB
• DIY Kit: 1x Display + 1x Adapter, unsoldered
• PRO: 1x Display + Adapter, fully pre-soldered

Important Notes

• Soldering is required for the “Display Module”, “I2C Adapter”, and “DIY Kit” variants
• The PRO version requires no soldering and is ready to use immediately
• Check pin assignment (GND, VCC, SCL, SDA) before soldering
• Microcontroller board (D1 Mini / C3 Mini) is not included

FAQ

Compatible Accessories

• WEMOS D1 Mini / C3 Mini Development Boards
• ProtoBoard Shields for D1 Mini / C3 Mini
• Jumper and I2C Cables
• Other OLED and TFT Displays in the Comfort Line Assortment