SparkFun Qwiic / STEMMA QT HAT for Raspberry Pi

Raspberry Pi HAT that exposes the Pi's I2C bus (3.3V, GND, SDA, SCL) on four Qwiic / STEMMA QT JST-SH connectors for daisy-chaining I2C sensors without breadboarding. Sold by Adafruit as product 4688.

Logical pinout · physical placement not verified

GND
Adafruit product page states the Qwiic HAT connects the Raspberry Pi I2C bus ground to the HAT Qwiic connectors.
Type · Ground
3.3V
Adafruit product page states the Qwiic HAT connects the Raspberry Pi 3.3V rail to the HAT Qwiic connectors.
Type · PowerVoltage · 3.3V
SDA
I2C data line from the Raspberry Pi GPIO header to the Qwiic connector array, per the product page.
Type · I2CVoltage · 3.3V logic
SCL
I2C clock line from the Raspberry Pi GPIO header to the Qwiic connector array, per the product page.
Type · I2CVoltage · 3.3V logic
Qwiic connectors
Four Qwiic/STEMMA QT connectors on the same I2C bus for daisy-chained sensors; modelled as the sold-board connector contract, not internal package pins.
Type · UnknownVoltage · 3.3V Qwiic/STEMMA QT bus

Pin	Type	Function	Voltage
GND	Ground	Adafruit product page states the Qwiic HAT connects the Raspberry Pi I2C bus ground to the HAT Qwiic connectors.
3.3V	Power	Adafruit product page states the Qwiic HAT connects the Raspberry Pi 3.3V rail to the HAT Qwiic connectors.	3.3V
SDA	I2C	I2C data line from the Raspberry Pi GPIO header to the Qwiic connector array, per the product page.	3.3V logic
SCL	I2C	I2C clock line from the Raspberry Pi GPIO header to the Qwiic connector array, per the product page.	3.3V logic
Qwiic connectors	Unknown	Four Qwiic/STEMMA QT connectors on the same I2C bus for daisy-chained sensors; modelled as the sold-board connector contract, not internal package pins.	3.3V Qwiic/STEMMA QT bus

Logical pinout · physical placement not verified

Pin details

5 connections

GND
Adafruit product page states the Qwiic HAT connects the Raspberry Pi I2C bus ground to the HAT Qwiic connectors.
Ground
3.3V
Adafruit product page states the Qwiic HAT connects the Raspberry Pi 3.3V rail to the HAT Qwiic connectors.
PowerVoltage · 3.3V
SDA
I2C data line from the Raspberry Pi GPIO header to the Qwiic connector array, per the product page.
I2CVoltage · 3.3V logic
SCL
I2C clock line from the Raspberry Pi GPIO header to the Qwiic connector array, per the product page.
I2CVoltage · 3.3V logic
Qwiic connectors
Four Qwiic/STEMMA QT connectors on the same I2C bus for daisy-chained sensors; modelled as the sold-board connector contract, not internal package pins.
UnknownVoltage · 3.3V Qwiic/STEMMA QT bus

Start wiring

Shield

Confirm the data interface matches your host board.

Module pins: 3.3V, GND, SDA, SCL. Schematik maps them to your board in the app.

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