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ADC Reading Tutorial

965 Views - Created 07/08/2020


Posted by:

GrahamT Avatar


I recently purchased the Expander Pi, as a novice I rely heavily on the tutorial on the website. I successfully worked my way through the tutorial on reading and writing to the IO pins but struggling with the “” when I first run the program I had a problem with the Libraries not being installed correctly, so I poked and prodded a bit… I now get the following when I run the program:

Python 3.7.3 (/usr/bin/python3)

>>> %cd /home/pi

>>> %Run

Traceback (most recent call last):

File "/home/pi/", line 16, in <module>

adc = ADC() # create an instance of the ADC

File "/usr/local/lib/python3.7/dist-packages/ExpanderPi/", line 122, in __init__, 0)

FileNotFoundError: [Errno 2] No such file or directory


Thank you in advance


Posted by:

andrew Avatar

United Kingdom

andrew Twitter  andrew Website  

Hello Graham

Have you enabled the SPI bus on your Raspberry Pi? Try going through the steps in our SPI tutorial and see if that fixes the problem.


Posted by:

GrahamT Avatar

And just like waving... it works...

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