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A 100 mm adapter cable that bridges the gap between Grove and STEMMA QT / Qwiic ecosystems. One end features a Grove connector, the other a JST SH (STEMMA QT...

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A 100 mm adapter cable that bridges the gap between Grove and STEMMA QT / Qwiic ecosystems. One end features a Grove connector, the other a JST SH (STEMMA QT / Qwiic compatible) connector — making it easy to mix and match sensors, breakouts, and host boards across different connector standards.

Key Features

  • Cross-Ecosystem Compatibility – Connects Grove devices to STEMMA QT / Qwiic boards and vice versa
  • 100 mm Length – Compact cable for tidy wiring
  • I2C Ready – Pre-wired for I2C communication (SDA, SCL, V+, GND)

Wire Colours

  • Black – GND
  • Red – V+ (3.3 V for Qwiic, 3–5 V for STEMMA QT)
  • Blue – SDA
  • Yellow – SCL

Compatibility

  • Grove I2C sensor (3–5 V) → STEMMA QT or Qwiic host (3 V)
  • STEMMA QT sensor (3–5 V) → Grove or STEMMA host (5 V)
  • Qwiic sensor (3 V only) → Grove or STEMMA host — ensure power is set to 3 V
Warning: When connecting a Qwiic board (3 V power only) to a Grove or STEMMA host, make sure the power switch is set to 3 V to avoid damaging the sensor.

Ideal For

  • Connecting Grove sensors to Qwiic/STEMMA QT host boards
  • Bridging different I2C connector ecosystems
  • Quick prototyping with mixed-ecosystem components

Resources

Jargon buster

Plain-language definitions for the technical terms used above.

GND
GND is the ground or reference connection (0 V) for a circuit. When connecting two devices together, their grounds must be joined so both agree on what counts as a low or high signal.
Grove
Grove is a standardised 4-pin plug-in connector system for sensors and modules that avoids soldering and jumper wires, with different cable types carrying I2C, UART, analogue or digital signals. When a product is Grove-compatible it can be quicker to connect supported modules, provided the connector type, signal and voltage all match.
I2C
I2C is a two-wire communication bus used by many sensors and small modules. It matters because several I2C devices can share the same two wires, but each device needs a compatible address and your controller must support I2C.
Qwiic
Qwiic is a plug-in connector system for I2C devices that uses small 4-pin cables, so you can connect compatible sensors without soldering. It matters because your controller or adapter also needs Qwiic, or you will need a cable or breakout to wire it up.
STEMMA
A plug-and-cable connection system used on some maker electronics boards to make wiring simpler. If a product uses STEMMA, you need the matching cable or connector type to plug it in without soldering.
STEMMA QT
A small plug-in connector system for I2C boards that lets you connect compatible sensors and controllers without soldering. It matters because it can make wiring faster and less error-prone, especially when adding several small modules to a project.

introducing adafruit stemma qt

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Related Tutorials

Free guides on learn.littlebird.com.au

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