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

Creating our dashboard using CherryPy


To create our home security dashboard, we will modify the code we wrote in Chapter 7, Setting Up a Raspberry Pi Web Server. These modifications include adding sensory data from the GPIOsomething we became very good at by the end of Chapter 17, Reading Raspberry Pi GPIO Sensor Data Using Python.

Two of the inputs, the temperature and humidity sensor and the Pi camera, will require additional steps so that we can integrate them into our dashboard.

Using the DHT11 to find temperature and humidity

The DHT11 temperature and humidity sensor is a low-cost hobbyist-grade sensor, capable of providing basic measurements. The DHT11 comes in two different versions, the four-pin model and the three-pin model.

We will be using the three-pin model for our project (see the following picture):

The library we will be using to read DHT11 data, the Adafruit DHT library, does not come pre-installed on Raspbian (as of the time of writing). To install it, we will clone the library...