BlueDot BNO055 9-Axis IMU

BlueDot BNO055 9-Axis IMU

27,99 €

  • Available
  • Ships within 3-5 days1


  • BNO055 from Bosch integrates a triaxial 14-bit accelerometer, a triaxial 16-bit gyroscope, a triaxial geomagnetic sensor and a 32-bit microcontroller.
  • Compatible with 3.3V and 5V.
  • I2C interface with two addresses selectable through pin ADR.
  • 10-pin header included.
  • Board dimensions are 30 x 19 x 2 mm.
  • 3D model available as STEP file.


The BNO055 absolute orientation sensor integrates an accelerometer, a gyroscope and a 32-bit microcontroller in a single package. Not only can you read the sensors at the same time, but a fusion algorithm running on the on-board microcontroller analyzes all the measured data and calculates the orientation of the device in space.


It can be distinguished between non-absolute or relative orientation and absolute orientation. Absolute orientation means orientation of the sensor with respect to the earth and its magnetic field. In other words, absolute orientation sensor fusion modes calculate the direction of the magnetic north pole. In non-absolute orientation modes, the heading of the sensor can vary depending on how the sensor was placed initially.

Technical Data


Along with the BlueDot BNO055 Board you also get a 10 pin header to connect the sensor. The easiest way to solder the board is to insert the header into a breadboard (long pins down) and solder the short pins down.

xkcd: lightsaber

Connecting via I2C

The BlueDot BNO055 IMU Board is hardwired to use the I2C communication protocol. The first step to use the sensor is to connect the board to a power supply.

  • VCC Pin. Connect the VCC pin from the board to either 5V or 3.3V output from your Arduino.
  • GND Pin. Connect the GND pin from the board to the GND from the Arduino.
  • 3V3 Pin. The 3V3 pin is connected directly to the output from the voltage regulator and you can use it to supply an external load. The maximum output current of the regulator is 150 mA, but just to be safe, avoid taking more than 50 mA from it. 

Connecting the sensor to the I2C bus is very easy. For that you need only two wires. The clock signal is generated by the Arduino and transferred to the sensor through the SCL line. The Arduino can send commands to the sensor using the SDA line. Just as well, all data from the sensor goes back to the Arduino through the SDA line. Because of that, the SDA line is bidirectional.

  • SDA Pin. Connect the SDA pin from the board to the SDA line on the Arduino. This corresponds to the pin A4 on the Arduino Uno.
  • SCL Pin. Connect the SCL pin from the board to the SCL line on your Arduino. This corresponds to the pin A5 on the Arduino Uno.
  • ADR Pin. Here we have two options. Leave the ADR pin unconnected to use the default I2C address (0x28). Instead we can connect the ADR pin to 3.3V in order to use the alternative I2C address (0x29).

That is all! You can leave the other pins unconnected and you are good to go! But what about the other pins, you may be wondering?

  • INT Pin. You can program the BNO055 to trigger an interrupt signal whenever a certain event occurs. For example, you can trigger an interrupt when the accelerometer detects a high-g movement or when the gyroscope detects a sudden change in the angular rate. You can find a full description of the possible interrupts on the datasheet (pages 38 to 46).
  • RST Pin. By applying a LOW signal then a HIGH signal to the RST pin you trigger a power-on reset and forces the sensor to restart in CONFIG mode and to initialize the register map with all default values.
  • PS0 and PS1 Pins. These pins can be used to change from I2C mode to HID (Human Interface Device) protocol. In case you are only using the I2C mode, just leave them unconnected.

Installing Arduino Library

The BlueDot BNO055 board works great with the Arduino Library written by Adafruit. The easiest way to start using the BNO055 IMU is to download and install the library directly from the Arduino IDE. Just open the Arduino IDE and go to Sketch > Include Library > Manage Libraries... and search for the Adafruit BNO055 Library on the Library Manager.

You can also go straight to the Adafruit Github page and download the latest version of the BNO055 library.

Upload Example Sketch

After installing the library we can open an example sketch. Adafruit included a great example, which we can use to run the BNO055 IMU. Just go to File > Examples > Adafruit BNO055 Library and open the sketch rawdata.


Now upload the example sketch to your microcontroller and you are good to go!

3D Model

A 3D model of the BlueDot BNO055 board is available as a STEP file (click here to download). A STEP file is a CAD file format widely used for exchanging CAD files between companies and can be easily read by most (if not all) CAD software applications.


You can also view 3D models online without installing any software on your computer. The images below were taken using Autodesk Viewer, a online, free to use tool from Autodesk. It does require a registration at Autodesk, but it is worth it!

3D Model from BlueDot BNO055 Board V1
Measuring dimension from BNO055 board using Autodesk Viewer.



Further Ressources