April 2021
Beginner
720 pages
16h 26m
English
Content preview from Python All-in-One For Dummies, 2nd Edition
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Chapter 3
Sensing the World
IN THIS CHAPTER
Discovering how to use I2C sensors
Sensing your environment with a Raspberry Pi
Collecting and saving data
Connecting Python to your smartphone
Sensors for the Raspberry Pi and other small computers number in the thousands. From detecting people in front of your computer with a passive infrared (PIR) sensor to detecting a myriad of environmental conditions (temperature, humidity, air quality, and so on), your computer can monitor the physical world in many inexpensive ways. In this chapter, you discover how to program your computer to communicate with these sensors.
To download the code for this chapter, go to www.dummies.com/go/pythonaiofd2e.
Understanding I2C
For a computer to talk to sensors, it needs an interface. An interface consists of a hardware interface, which contains pins, types, and voltage levels, and a software interface, which is usually called a driver or an API (application programming interface). In this book, the software interface is a Python module.
You get data to your computer from your outside sensors in four ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.