GY-BNO055 9DOF Absolute Orientation IMU Sensor Module (I2C) – Accelerometer, Gyroscope, Magnetometer Fusion
Product Description:
The GY-BNO055 9DOF Absolute Orientation Sensor Module is a high-precision 9-axis IMU (Inertial Measurement Unit) breakout board that combines a 3-axis accelerometer, 3-axis gyroscope, and 3-axis magnetometer. Unlike traditional IMUs, the BNO055 simplifies complex motion tracking by integrating a high-speed ARM Cortex-M0 processor directly on the chip. This enables onboard real-time sensor fusion, providing accurate and stable orientation data without the need for external computation.
If you've previously struggled with combining accelerometer, gyroscope, and magnetometer data, the BNO055 takes the guesswork out of the process. It fuses sensor data automatically and delivers ready-to-use output such as Euler angles, quaternions, or motion vectors—all accessible over I2C.
Some manufacturers ship these modules with the jumpers open, while others ship them closed. To enable I2C communication, both jumpers must be closed, as shown in the picture.
If your sensor is not responding at the default I2C address, you may need to manually specify the correct address. In this case, the issue was resolved by changing the initialization to:
Adafruit_BNO055 bno = Adafruit_BNO055(55, 0x29);
The correct I2C address (0x29) was identified using an I2C scanner sketch. Always scan your I2C bus first to confirm the address before initializing the sensor.
Key Features:
Combines accelerometer, gyroscope, and magnetometer on a single chip
Onboard ARM Cortex-M0 processor performs real-time sensor fusion
Outputs orientation data as Euler angles, quaternions, or vectors
I2C communication interface (default address 0x28 or 0x29)
Fully self-contained, no need for complex external libraries or fusion algorithms
Compact and easy to integrate in embedded systems
Sensor Outputs:
Absolute Orientation (Euler, 100Hz): Three-axis orientation (360°)
Quaternion (100Hz): Four-point rotation representation
Angular Velocity (100Hz): Rotation speed (rad/s)
Acceleration (100Hz): Acceleration with gravity (m/s²)
Linear Acceleration (100Hz): Motion-only acceleration, gravity removed
Gravity Vector (100Hz): Gravity direction excluding motion
Magnetic Field (20Hz): Environmental magnetic field strength (μT)
Temperature (1Hz): Ambient temperature (°C)
How to Use with Arduino (I2C Configuration):
Close both I2C jumpers (solder bridges) on the module to enable I2C mode.
Connect wiring:
GND → GND
VIN → 3.3V
SDA → D2 (NodeMCU)
SCL → D1 (NodeMCU)
Install Arduino IDE 1.8.7 or newer.
Add the ESP8266 board via Board Manager and select NodeMCU 1.0 (ESP-12E Module).
Install Adafruit BNO055 and Adafruit Unified Sensor libraries.
Run the sensorapi example and modify the BNO initialization to: Adafruit_BNO055 bno = Adafruit_BNO055(55, 0x29);
Upload and start receiving data in seconds!
Technical Specifications:
Operating Voltage: 3.3V (VIN supports 3.3V input only)
Communication: I2C (default address 0x28/0x29 selectable)
Sensor Fusion Rate: Up to 100Hz
Built-in Processor: ARM Cortex-M0
Dimensions: Compact module form factor
Compatible with: Arduino, ESP8266, ESP32, STM32, etc.
Applications:
Robotics and Drone Stabilization
Head Tracking and Gesture Recognition
3D Motion Capture
Augmented/Virtual Reality
Smart Wearables and Navigation Systems
Package Includes:
Why Choose GY-BNO055?
Get precise 3D orientation without spending weeks on sensor fusion math. The GY-BNO055 brings plug-and-play simplicity to complex motion sensing, making it ideal for engineers, hobbyists, and educators alike.
Take your motion projects to the next level—add the GY-BNO055 to your cart today!
