self.bus = smbus.SMBus(self.busNumber) IOError

Submitted by nickmallonee727... on Mon, 03/28/2016 - 16:28

Forums:

Hello Everyone,

I am building my first bot to run on a raspberry pi.
However, I have run into an issue with the following while trying to get
a test scrip to load. I have been digging for answers for the past few days
and can not find a solution that solves my issue. Does anyone know any
solutions?


File "PicoBorgRev.py", line 234, in Init self.bus = smbus.SMBus(self.busNumber) IOError: [Errno 2] No such file or directory.

thank you for your time,
--Nicholas

piborg's picture

piborg

Tue, 03/29/2016 - 10:33

What is happening is that the PicoBorg Reverse script is having trouble talking with the board itself.

There are a few reasons this could be the case:

  1. The I2C driver might not be running
  2. The script might be trying to use the wrong bus
  3. There may be a cabling problem between the Raspberry Pi and the PicoBorg Reverse

If you could answer these questions it will help us determine which is the problem:

  1. What lines are printed by the script prior to the error line?
  2. What result do you get running: sudo i2cdetect -y 0
  3. What result do you get running: sudo i2cdetect -y 1
  4. Does the LED on the PicoBorg Reverse come on when you connect power to the Raspberry Pi?
  5. What result do you get running: uname -a

nickmallonee727...

Tue, 03/29/2016 - 23:18

Answers in order:

2. error could not open file '/dev/i2c-0' or '/dev/i2c/0': No such file or directory
3. 0 1 2 .... f (prints a matrix )
00: -- -- --- --

in Row 40, col 4, Number 44 appears.

4. Yes a red led lights up.
5. Linux pi.Nicholas 4.1.13-v7+ #826 SMP PREEMPT Fri Nov 13 20:19:03 GMT 2015 arm7l GNU/Linux

Does this help explain any issue I might have?
Also, thank you for replying

Nicholas

nickmallonee727...

Tue, 03/29/2016 - 23:27

I found the issue, I did not notice a connection that was not fully seated properly!
So this one is on me! Can not wait to get to work programming this thing!

Thanks for everything,
Nicholas

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