[PLEASE HELP] RuntimeError: UART read error: 7

[jssaditi]

Hello,

I'm trying to use BNO055 with my RPi 4B (Bullseye OS) in UART mode. I've followed all the steps outlined on the Python & CircuitPython page and enabled UART on the RPi but I keep getting the UART write error 7 when I run the bno055_simpletest.py from the examples. The program runs correctly for a second or two but then crashes.

Image of error message:

Setup of RPi and BNO055:

Is there any way to solve this issue?
Thank you in advance!

[ladyada]

i would use I2C mode rather than UART first, see if that helps

[jssaditi]

Awesome, I'll try that and let you know.

[jssaditi]

Hi @ladyada,
What are the I2C intialisations required for creating a sensor object on RPi?

I only see this piece of code relating to I2C on the Python and CircuitPython page:
import board
import busio
import adafruit_bno055
i2c = busio.I2C(board.SCL, board.SDA)
sensor = adafruit_bno055.BNO055_I2C(i2c)

It looks like this is for a CircuitPython board and not Python board.

[FoamyGuy]

@jssaditi there are some instructions on this page for using I2C sensor with Raspberry Pi and Blinka compatibility layer: https://learn.adafruit.com/circuitpython-on-raspberrypi-linux/i2c-sensors-and-devices

[jssaditi]

Thank you FoamyGuy!

[ladyada]

if you need more help please post to the adafruit forums for tech support!
thanks!

[jssaditi]

The BNO055 is working with the RPi in I2C mode now.
Thank you so much!!