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Raspberry Pi Cookbook for Python Programmers by Tim Cox

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Reading analog data using an analog-to-digital converter

The I2CTools (used in the previous section) are very useful for debugging I2C devices on the command line, but they are not practical for use within Python, as they would be slow and require significant overhead to use. Fortunately, there are several Python libraries that provide I2C support, allowing efficient use of I2C to communicate with connected devices and provide easy operation.

We will use such a library to create our own Python module that will allow us to quickly and easily obtain data from the ADC device and use it in our programs. The module is designed in such a way that other hardware or data sources may be put in its place without impacting the remaining examples.

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