ADXL345 not working

erenaud

Hi
I folowed this procedure https://wiki.up-community.org/Adafruit#Using_Adafruit_ADXL345_Triple-Axis_Accelerometer_Breakout_board_on_UP but it doesn't work. Full traceback:

sudo python examples/simpletest.py
Traceback (most recent call last):
  File "examples/simpletest.py", line 12, in <module>
    accel = Adafruit_ADXL345.ADXL345()
  File "build/bdist.linux-x86_64/egg/Adafruit_ADXL345/ADXL345.py", line 65, in __init__
  File "build/bdist.linux-x86_64/egg/Adafruit_GPIO/I2C.py", line 152, in readU8
  File "build/bdist.linux-x86_64/egg/Adafruit_PureIO/smbus.py", line 155, in read_byte_data
IOError: [Errno 6] No such device or address

I noticed I have the same error when I don't use sudo. Could it be because my I2C bus is not detected at all ?

I have an up squared, maybe the the tutorial above only works for up board ?

Thanks

erenaud

Ok so I was right : those instructions must be slightly modified to work with UP Square. What I did :
On this link, I got info about i2c for UP Square http://wiki.up-community.org/Pinout_UP2 , I ran this command to get my bus number :

ls /sys/bus/pci/devices/*/i2c_designware.0/ | grep i2c
i2c-4

ls /sys/bus/pci/devices/*/i2c_designware.1/ | grep i2c
i2c-5

So first thing, I don't get the same result as Wiki page. I have no idea if it's a problem but I will go for no.

Then, I checked for my device address :

sudo i2cdetect -y -r 5
        0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:          -- -- -- -- -- -- -- -- -- -- -- -- -- 
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
50: -- -- -- 53 -- -- -- -- -- -- -- -- -- -- -- -- 
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
70: -- -- -- -- -- -- -- --

In the file, examples/simpletest.py, I changed this

accel = Adafruit_ADXL345.ADXL345()

by this :

accel = Adafruit_ADXL345.ADXL345(address=0x53, busnum=5)

ccalde

Hi @erenaud ,

Is now your ADXL345 working with your fix? If so, please redefine the discussion title as [RESOLVED] ADXL345 not working

Thank you!