OSError: I2C bus error

[arthurlutz]

    from machine import I2C
    i2c = I2C(0, I2C.MASTER)#, baudrate=100000)
    adxl345 = ADXL345(i2c)

MicroPython v1.8.6-724-g2b9ed601 on 2017-07-28; WiPy with ESP32
Type "help()" for more information.
>>>
>>> Running adxl345.py

>>>
>>>
>>>
>>>
Start
Traceback (most recent call last):
  File "<stdin>", line 111, in <module>
  File "<stdin>", line 63, in __init__
  File "<stdin>", line 71, in setBandwidthRate
OSError: I2C bus error
>```