I'm following along this tutorial on learn.adafruit.com.http://learn.adafruit.com/matrix-7-segm ... pi-for-i2c
When I run the example:
sudo pytho ex_8x8_pixels.py
I receive this error:
IOError: [Errno 2] No such file or directory
Typing sudo i2cdetect -y 0 also returns a similar error:
Error: Could not open file '/dev/i2c-0' or '/dev/i2c/0': No such file or directory.
The installation of python-smbus and i2c-tools succeeded. What did I do wrong?