MATLAB: Reading BNO055 on MATlab

arduino

Hello,

I'm currently attempting to retrieve euler angles from my BNO055 sensor which is connected to my arduino. I've managed to get MATlab to recognize the arduino connection and what it's properties are, but I'm uncertain as to how I'd approach retrieving this data. I'm able to do this using the Arduino IDE/Serial plotter, but not sure how I'd attempt this on MATlab.

I'm fairly new to MATlab, so bear with me.

Thanks a lot.

Best Answer

Here is an example of how to communicate with an I2C device - https://www.mathworks.com/help/supportpkg/arduinoio/ug/measure-temperature-from-i2c-device-on-arduino-hardware.html

You can use a similar approach to communicate with your sensor. Please note - the commands will most probably be completely different for your sensor, you will have to find the appropriate commands from Manual of the sensor.

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MATLAB: How read acceleration data for BNO055

I doubt that anybody on this forum knows your particular sensor so I'm afraid the most likely answer would be: read (or re-read) the documentation of your sensor. Possibly, contact the manufacturer. For a), the possible answer may be:

The sensor is not connected properly
You're not sending it the right command
You're not reading the response correctly
You're not providing enough acceleration to make a difference in the result (i.e the sensitivity of the sensor is too low
You're providing too much acceleration and thus always reading the max value (i.e. the sensor is too sensitive)
...

For b), no you're not reading 7 bits. You're reading 14 bytes (7 time 16-bit values). I would think it's unlikely that the sensor actually only send 7 bits of data. Most likely it sends 8 bits, of which only 7 are used. The command to read 8 bits would be:

read(bno, 1, '*uint8')   %the * is optional but it's probably easier if you store the data as uint8 instead of double

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5. Adding support for custom libraries is possible, with the latest support package version (MATLAB R2015b with MATLAB Arduino support package version 15.2.3). Please follow these links: http://www.mathworks.com/help/supportpkg/arduinoio/ug/custom-library-concepts.html http://www.mathworks.com/help/supportpkg/arduinoio/custom-arduino-libraries.html

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