The 4-in-1 GLINK / QWIIC / STEMMA QT Connector Board is a compact interconnect module designed to simplify I²C signal distribution in embedded and prototyping systems. It allows a single GLINK connection to be split into multiple ports, enabling easy daisy-chaining of GLINK/Qwiic-compatible sensors, displays, and peripherals without soldering or complex wiring.

This board provides four GLINK connectors arranged in a cross layout, ensuring clean signal routing and reliable power distribution across all connected devices. It supports standard GLINK / STEMMA QT / QWIIC I²C signals (3.3V, GND, SDA, SCL) and is fully compatible with popular development platforms such as Arduino, GLYPH and other microcontrollers using QWIIC or STEMMA QT ecosystems.

Commonly used as an I²C hub or splitter, the 4-in-1 QWIIC connector board is ideal for rapid prototyping, sensor expansion, and modular system design. Its small footprint, plug-and-play operation, and robust PCB design make it well suited for educational kits, IoT devices, and compact embedded projects

Interface Details

Supported Interfaces:

GLINK / QWIIC / STEMMA QT Compatible I²C Interface
I²C Signal Distribution (SDA, SCL)
Power Distribution (3.3V, GND)

4-Pin Header Definition (2.54 mm):

3.3V – Power Supply
GND – Ground
SDA – I²C Data Line
SCL – I²C Clock Line

Applications

I²C sensor expansion
Rapid prototyping and testing
Embedded system development
IoT sensor networks
Educational electronics kits
Modular system design

Features

4-port GLINK / QWIIC / STEMMA QT hub
Plug-and-play I²C signal splitting
No soldering required
Compact cross-shaped PCB design
Supports 3.3V I²C devices
Fully GLINK / QWIIC / STEMMA QT ecosystem compatible

GLINK I2C Communication Breakout (QWIIC / STEMMA QT I2C Hub)