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Internet of Things Programming Projects

You're reading from   Internet of Things Programming Projects Build modern IoT solutions with the Raspberry Pi 3 and Python

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Product type Paperback
Published in Oct 2018
Publisher Packt
ISBN-13 9781789134803
Length 436 pages
Edition 1st Edition
Languages
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Author (1):
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Colin Dow Colin Dow
Author Profile Icon Colin Dow
Colin Dow
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Table of Contents (21) Chapters Close

Preface 1. Installing Raspbian on the Raspberry Pi FREE CHAPTER 2. Writing Python Programs Using Raspberry Pi 3. Using the GPIO to Connect to the Outside World 4. Subscribing to Web Services 5. Controlling a Servo with Python 6. Working with the Servo Control Code to Control an Analog Device 7. Setting Up a Raspberry Pi Web Server 8. Reading Raspberry Pi GPIO Sensor Data Using Python 9. Building a Home Security Dashboard 10. Publishing to Web Services 11. Creating a Doorbell Button Using Bluetooth 12. Enhancing Our IoT Doorbell 13. Introducing the Raspberry Pi Robot Car 14. Controlling the Robot Car Using Python 15. Connecting Sensory Inputs from the Robot Car to the Web 16. Controlling the Robot Car with Web Service Calls 17. Building the JavaScript Client 18. Putting It All Together 19. Assessments 20. Other Books You May Enjoy

Write a Python program to control the servo

Jerry Seinfeld once joked that all we need to know about the weather is: Should we bring a coat or not? For the rest of this chapter and the next, we will build an analog meter needle dashboard to indicate the wardrobe needed for the weather conditions.

We will also add an LED that will turn on to indicate that an umbrella is needed, and flash to indicate a very bad storm.

Before we can build the dashboard in Chapter 6, Working with the Servo Control Code to Control an Analog Device, we need code to control the servo and LED. We will start by creating a class to do just that.

This class will set the servo position and LED state on our circuit:

  1. Open up Thonny from Application Menu | Programming | Thonny Python IDE
  2. Click on the New icon to create a new file
  1. Type the following:
from gpiozero import Servo
from gpiozero import LED

class...
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