The BNO055 absolute orientation sensor is an amazing device. It 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.
Here are 5 features that make the BlueDot BNO055 9-Axis IMU such an amazing board:
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.
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.
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.
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?