Book Image

Python Programming with Raspberry Pi

By : Sai Yamanoor, Srihari Yamanoor
Book Image

Python Programming with Raspberry Pi

By: Sai Yamanoor, Srihari Yamanoor

Overview of this book

Raspberry Pi Zero is a super-small and super-affordable product from Raspberry Pi that is packed with a plethora of features and has grabbed the notice of programmers, especially those who use Python. This step-by-step guide will get you developing practical applications in Python using a Raspberry Pi Zero. It will become a valuable resource as you learn the essential details of interfacing sensors and actuators to a Raspberry Pi, as well as acquiring and displaying data. You will get started by writing a Python program that blinks an LED at 1-second intervals. Then you will learn to write simple logic to execute tasks based upon sensor data (for example, to control a motor) and retrieve data from the web (such as to check e-mails to provide a visual alert). Finally, you will learn to build a home automation system with Python where different appliances are controlled using the Raspberry Pi. The examples discussed in each chapter of this book culminate in a project that help improve the quality of people’s lives.
Table of Contents (17 chapters)
Credits
About the Authors
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface

Camera setup for the web interface


Note

You will encounter some issues even after following the instructions to the tee. We have included references that we used to fix the problem at the end of this chapter.

In this section, we will set up the camera to stream to a browser. The first step is installing the motion package:

sudo apt-get install motion

Once the package is installed, the following configuration changes need to be applied:

  1. Edit the following parameters in /etc/motion/motion.conf:
daemon on
       threshold 99999
       framerate 90
       stream_maxrate 100
       stream_localhost off
  1. Include the following parameter in /etc/default/motion:
       start_motion_daemon=yes
  1. Edit /etc/init.d/motion as follows:
start)

       if check_daemon_enabled ; then

       if ! [ -d /var/run/motion ]; then

       mkdir /var/run/motion

       fi

       chown motion:motion /var/run/motion

       sudo modprobe bcm2835-v4l2

       chmod 777 /var/run/motion

       sleep 30

       log_daemon_msg ...