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Small green circuit board with two white JST SH connectors and one black Grove connector

Seeed Studio

Seeed Studio Grove Qwiic Hub transducer 25.4x17.8mm 3.3/5V

SKU CH-AS3A-ME1GQ

Connects Grove, Qwiic and STEMMA QT I²C modules on one bus with built-in 3.3 V/5 V level shifting

  • TypeSensors
  • Connect Qwiic and STEMMA QT modules to Grove controllers
  • Use Grove sensors on Qwiic and STEMMA QT boards
  • Cascade multiple I2C devices on one shared bus
  • Built-in level shifting supports 3.3V and 5V power
  • Compact 25.4x17.8mm board fits tight spaces

Grove–Qwiic Bridge

This adapter links a Grove controller to Qwiic or STEMMA QT I²C modules, or connects Grove sensors to a Qwiic host. It measures 25.4 × 17.8 mm and operates from either a 3.3 V or 5 V supply. Two JST SH 1.0 mm connectors provide the Qwiic/STEMMA QT ports, while on-board level shifting handles the voltage translation automatically.

Suits mixed-ecosystem prototypes

Makers who already own Grove boards and want to add Sparkfun or Adafruit I²C sensors can do so without rewiring. Builders working exclusively within one connector family — only Grove, only Qwiic, or only STEMMA QT — gain no extra ports from this hub and should use a native splitter instead.

Handles several I²C devices on one bus

Up to 3.5 MHz clock rate lets the hub pass standard- and fast-mode traffic for multiple sensors chained together. Designs that need higher bus speeds, more than two Qwiic ports, or isolation between device groups will exceed what this board provides.

Highlights

  • Connect Qwiic and STEMMA QT modules to Grove controllers
  • Use Grove sensors on Qwiic and STEMMA QT boards
  • Cascade multiple I2C devices on one shared bus
  • Built-in level shifting supports 3.3V and 5V power
  • Compact 25.4x17.8mm board fits tight spaces

Specifications

TypeSensors

Questions about this item

What connectors must my existing controller board provide to plug this hub in?

Your controller needs either a Grove port or a JST SH 1.0 mm Qwiic/STEMMA QT port; the hub bridges both so you can attach modules of either type.

Will the hub work with 3.3 V I2C devices I already own?

Yes, the built-in level shifting supports 3.3 V and 5 V supply, so older 3.3 V modules share the same bus safely.

How can I verify the hub is passing data after wiring it up?

Run an I2C bus scan from your controller; every connected module should appear at its address up to the 3.5 MHz communication limit.

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