Beginners Guide to I2C on the Raspberry Pi Pico (BNO055 IMU Example)

This video covers the basics of the I2C communication protocol and how to use it on your Raspberry Pi Pico. We use a Visual Studio Code project to program the brand-new Raspberry Pi Pico microcontroller board in C. We created a project which uses the BNO055 inertial measurement unit (IMU) to read values of acceleration over I2C and print them to a serial monitor over a USB connection to a PC. I realise that I continuously say BNO005 not BNO055 in the video, oops!

This video provides the fundamental background of the I2C communication protocol and explains how to correctly wire an I2C compatible device to the Pico. It explains which functions in the Pico SDK to use in order to communicate with this device. We also cover how to configure the Raspberry Pi Pico correctly in order to enable I2C communication.

As an example, the BNO055 breakout board from Adafruit is used to demonstrate writing to, and reading from, registers on a peripheral device. This video also shows you where to find the required information in your particular peripheral device’s datasheet in order to get your peripheral device functioning correctly.

The source code for this project (and a written article version coming soon!) is available here: https://learnembeddedsystems.co.uk/bno005-i2c-example-code

BNO055 Breakout board is available at Amazon (Affiliate):
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SparkFun Article regarding pull up resistors: https://learn.sparkfun.com/tutorials/pull-up-resistors/all

Timestamps
00:00 Introduction
00:48 I2C Basics
02:15 Pico Wiring
03:03 I2C Messages
04:47 Pico SDK I2C Functions
06:00 Read/Write Operations
06:25 Programming Example
16:16 Conclusion

If this video helped you, please consider leaving a like and subscribing, thank you!

To see my other videos on the Raspberry Pi Pico, check out the playlist here: https://www.youtube.com/playlist?list=PLEB5F4gTNK68IlRIJtcJ_2cW4dSdmreTw

You can find more embedded systems tutorials and projects on my website https://learnembeddedsystems.co.uk

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