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Raspberry Pi Robotic Blueprints

You're reading from   Raspberry Pi Robotic Blueprints Utilize the powerful ingredients of Raspberry Pi to bring to life your amazing robots that can act, draw, and have fun with laser tags

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Product type Paperback
Published in Oct 2015
Publisher
ISBN-13 9781784396282
Length 198 pages
Edition 1st Edition
Concepts
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Toc

Table of Contents (9) Chapters Close

Preface 1. Adding Raspberry Pi to an RC Vehicle FREE CHAPTER 2. Adding Raspberry Pi to a Humanoid Robot 3. Building a Tracked Vehicle That Can Plan Its Own Path 4. Building a Robot That Can Play Laser Tag 5. A Robot That Can Draw 6. A Robot That Can Play Air Hockey 7. A Robot That Can Fly Index

Creating a program in Python to control the mobile platform


Now that you can control your servos by using a basic command-line program, let's control them by programming movement in Python. In this section, you'll create a Python program that will let you talk to your servos a bit more intuitively. You'll issue commands that will tell a servo to go to a specific angle and it will go to that angle. You can then add a set of such commands to allow your robot to move forward, backward, or position the claw to any specific location.

Let's start with a simple program that will make your robot's servos turn 90 degrees; this will be somewhere close to the middle of the 180 degree range that you can work within. However, the center, maximum, and minimum values can vary from one servo to another, so you may need to calibrate them. To keep things simple, we will not cover this here. The following screenshot shows the code that is required for turning the servos:

The following is an explanation of the...

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