BNO055 instance fail unless with frequency arg. BNO055 polling unstable, fails invariably

[iani]

Hello,
I am posting this after seeing a similar issue on the CCS811 here:
adafruit/Adafruit_CircuitPython_CCS811#9

I am experiencing exactly the same problems, with write fail like this:
File "adafruit_bus_device/i2c_device.py", line 102, in write
Example:

Traceback (most recent call last):
File "", line 1, in
File "ccs811_example.py", line 10, in
File "adafruit_ccs811.py", line 113, in init
File "adafruit_register/i2c_bit.py", line 40, in get
File "adafruit_register/i2c_bit.py", line 39, in get
File "adafruit_bus_device/i2c_device.py", line 102, in write
OSError: [Errno 5] EIO

I tried creating both busio and bitbangio instances with frequency set to 10000. This works:

i2c_bus = bitbangio.I2C(board.SCL, board.SDA, frequency=10000) # was 10000

But always after some time interval, there is a write error, like this:

Accelerometer (m/s^2): (162.55, -123.85, -30.97)
Magnetometer (microteslas): (2036.0, -0.0625, -0.0625)
Traceback (most recent call last):
File "main.py", line 73, in
File "adafruit_bno055.py", line 76, in get
File "adafruit_register/i2c_struct.py", line 58, in get
File "adafruit_register/i2c_struct.py", line 57, in get
File "adafruit_bus_device/i2c_device.py", line 102, in write
OSError: [Errno 19] ENODEV

I tried different frequencies and different delay times between polling intervals, to no avail.

Is there a way to stabilize the behavior of the sensor and the library?

Thank you!

Iannis Zannos

[caternuson]

This is probably related to #9

[kattni]

@iani Are you still experiencing this issue?