Book Image

Mastering IOT

By : Colin Dow, Perry Lea
Book Image

Mastering IOT

By: Colin Dow, Perry Lea

Overview of this book

The Internet of Things (IoT) is the fastest growing technology market. Industries are embracing IoT technologies to improve operational expenses, product life, and people's well-being. We’ll begin our journey with an introduction to Raspberry Pi and quickly jump right into Python programming. We’ll learn all concepts through multiple projects, and then reinforce our learnings by creating an IoT robot car. We’ll examine modern sensor systems and focus on what their power and functionality can bring to our system. We’ll also gain insight into cloud and fog architectures, including the OpenFog standards. The Learning Path will conclude by discussing three forms of prevalent attacks and ways to improve the security of our IoT infrastructure. By the end of this Learning Path, we will have traversed the entire spectrum of technologies needed to build a successful IoT system, and will have the confidence to build, secure, and monitor our IoT infrastructure. This Learning Path includes content from the following Packt products: Internet of Things Programming Projects by Colin Dow Internet of Things for Architects by Perry Lea
Table of Contents (34 chapters)
Title Page
Copyright
About Packt
Contributors
Preface
Free Chapter
1
The IoT Story
Index

Displaying sensory data on our dashboard


To provide our dashboard data, we will create a new Python file called SecurityData.py where we will store the SecurityData class. Before we do that, let's build our circuit.

Home security dashboard with a temperature sensor

We will build our first version of the home security dashboard with a DHT11 temperature and humidity sensor, a PIR sensor, and a latching button (or key switch). The following is the Fritzing diagram for our home security dashboard:

The circuit connects as follows:

  • GND from DHT11 to GND
  • VCC on DHT11 to 5V DC
  • Signal on the DHT11 to GPIO pin 19
  • GND from PIR sensor to GND
  • VCC on PIR sensor to 5V DC
  • Signal on PIR sensor to GPIO pin4
  • One end of the latching button to GPIO pin 8
  • The other end of the latching button to GND
  • Pi camera module to CSI port (not shown)

Following is a photo of our circuit. One thing to note is the separate breadboard for our DHT11 sensor (easier to fit on a micro breadboard), as well as the key switch in place of a latching...