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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.
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.
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: Magnetic Field, Acceleration and Angular Rate. The BNO055 contains a triaxial geomagnetic sensor, a triaxial 16-bit gyroscope and a triaxial 14-bit accelerometer in a single package. This enables you to simultaneously measure the linear acceleration, rotational acceleration and the strength of the magnetic field. Fusion Modes. The fusion algorithm running on the on-board 32-bit microcontroller reads all the sensors simultaneously and delivers extremely valuable data like the gravity field vector, the device's absolute orientation (through the quaternions and euler vectors), the magnetic north (as with a compass), etc. 3.3V and 5V Power Supply. The on-board voltage regulator accepts anything from 2.6V to 5.5V to supply the BME280 sensor. I2C Communication. Using the I2C protocol you need no more than two wires to communicate with the BNO055 sensor. Data Transfer with both 5V and 3.3V devices. While devices like the Arduino Uno interpret a 5V signal as a logic HIGH, the BNO055 uses 3.3V as a logic HIGH. The on-board logic level converter translates the 5V signals into 3.3V signals and vice-versa.
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