Chapter 7. Sense and Display Real-World Data
In this chapter, we will cover the following topics:
- Using devices with the I2C bus
- Reading analog data using an analog-to-digital converter
- Logging and plotting data
- Extending the Raspberry Pi GPIO with an I/O expander
- Capturing data in an SQLite database
- Viewing data from your own webserver
- Sensing and sending data to online services
Introduction
In the previous chapter, we made use of the Raspberry Pi GPIO to directly control and respond to the attached hardware by controlling or reading the GPIO pins. In this chapter, we will learn how to collect analog data from the real world and process it so we can display, log, graph, and share the data and make use of it in our programs.
We will extend the capabilities ...
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