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Small green circuit board with sensor chip and four-pin connector

Adafruit

Adafruit ADXL343 Triple-Axis Accelerometer Sensor

SKU CH-TE6C-DD25T

A budget-friendly triple-axis accelerometer with I2C and SPI interfaces, selectable ranges up to ±16 g, and STEMMA QT connectivity for solder-free use with 3 V or 5 V microcontrollers

  • TypeSensors
  • Triple-axis X Y Z motion sensing for precise orientation tracking
  • Selectable ±2g to ±16g range matches resolution to movement speed
  • 10 or 13-bit internal ADC delivers high-resolution digital output
  • STEMMA QT Qwiic connector enables solder-free I2C or SPI wiring
  • Code compatible with ADXL345 libraries for Raspberry Pi and Arduino

Triple-axis accelerometer for microcontrollers

The ADXL343 is a new triple-axis accelerometer sensor that measures X, Y and Z movement. It connects through I2C or SPI digital interfaces and offers selectable sensitivity ranges of ±2g, ±4g, ±8g or ±16g. The board includes STEMMA QT and Qwiic connectors for solderless wiring to 3V or 5V microcontrollers such as Raspberry Pi or Arduino.

Check voltage logic and interface choice

Verify that your microcontroller operates at 3V or 5V logic levels to match the sensor. Decide whether you will use the I2C or SPI protocol for communication and ensure the chosen pins are free on your board. The STEMMA QT connectors require a compatible cable if you prefer not to solder header pins.

STEMMA QT connectors and interrupt pins

The STEMMA QT and Qwiic connectors allow instant plug-in connections without soldering. Two interrupt pins are provided and can be mapped independently to motion events such as tap, double-tap, activity, inactivity and free-fall detection. Code written for the ADXL345 will likely run on this sensor without changes.

Highlights

  • Triple-axis X Y Z motion sensing for precise orientation tracking
  • Selectable ±2g to ±16g range matches resolution to movement speed
  • 10 or 13-bit internal ADC delivers high-resolution digital output
  • STEMMA QT Qwiic connector enables solder-free I2C or SPI wiring
  • Code compatible with ADXL345 libraries for Raspberry Pi and Arduino

Specifications

TypeSensors

Questions about this item

Does the ADXL343 breakout include cables or headers, or must they be purchased separately?

The board uses STEMMA QT and Qwiic connectors so it plugs in without soldering; cables and headers are not included and must be sourced separately.

Should I choose the ±2 g, ±4 g, ±8 g or ±16 g range for my project?

Select ±2 g for maximum resolution on slow movements, ±16 g for high-speed impacts, and ±4 g or ±8 g for a balance between the two extremes.

What does the 10 or 13-bit ADC resolution mean when the sensor is running in a real microcontroller project?

It determines the smallest detectable change in acceleration; 13-bit gives finer steps than 10-bit, improving precision for subtle motion detection.

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