7Semi BMI323 IMU Breakout Board – 6DOF Accelerometer + Gyroscope with Qwiic Support (SPI/I2C)

The 7Semi BMI323 IMU Breakout Board is a 6 Degrees of Freedom (6DOF) motion sensor featuring Bosch’s latest BMI323 inertial measurement unit. This high-performance, low-power IMU combines a 3-axis accelerometer and 3-axis gyroscope in a compact breakout board with Qwiic connectors and dual communication interfaces (I²C and SPI). It’s ideal for motion tracking, gesture detection, and orientation applications in robotics, wearables, and mobile systems.

Features

• 6DOF Motion Tracking – 3-axis accelerometer + 3-axis gyroscope

• Ultra-Low Power Operation with configurable power modes

• Built-in Features: Step counting, tap detection, auto low-power switching

• Dual Interface Support: I²C (up to 1MHz), SPI (up to 10MHz)

• Configurable Interrupts: INT1, INT2 pins for motion events

• Qwiic-Compatible Connectors – Plug-and-play for rapid prototyping

Applications

• Robotics & Automation – balance, direction, and movement sensing

• Wearables & Fitness Trackers – step detection, motion recognition

• Mobile Devices & Gesture Input – tap sensing, tilt actions

• Navigation Systems – dead reckoning, tilt-compensation

• Gaming Controllers & VR Systems – motion tracking

• Vehicle and Asset Tracking – shock, vibration logging

What is Included?

• 1 × 7Semi BMI323 IMU 6DOF Sensor Board

• 1 × Set of male header pins (unsoldered)

Frequently Asked Questions (FAQ)

Q1: What makes the BMI323 different from older Bosch IMUs like BMI160 or BMI270?
A: The BMI323 offers improved power efficiency, built-in motion functions (like auto-wakeup and tap detection), a more flexible FIFO system, and a lower memory footprint.

Q2: Can this sensor be used for orientation tracking?
A: Yes, it supports gyroscope and accelerometer fusion. Combine it with a sensor fusion algorithm (like Madgwick or Kalman filter) for reliable 3D orientation.

Q3: Does it support step counting and activity recognition?
A: Yes, the BMI323 includes built-in algorithms for step counting and activity detection (stationary, walking, etc.), reducing processing load on the host MCU.

Q4: Is it compatible with Arduino or ESP32?
A: Yes, you can use I²C or SPI to connect it to ESP32, Arduino (Nano, Mega, Due), or Raspberry Pi. Libraries are available via Bosch BMI SDK or community-supported platforms.

Q5: What Qwiic port voltage should I use?
A: The board is designed for 3.3V logic systems. Do not connect it directly to 5V I²C without a logic level shifter.

Resources

• ? Bosch BMI323 Datasheet.