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Internet of Things with Python
Internet of Things with Python

Internet of Things with Python: Create exciting IoT solutions

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Internet of Things with Python

Chapter 2. Working with Python on Intel Galileo Gen 2

In this chapter, we will start our journey towards Internet of Things (IoT) with Python and the Intel Galileo Gen 2 board. We shall:

  • Set up the environment to start working with Python as the main programming language
  • Retrieve the board's assigned IP address after it boots a Yocto Linux distribution
  • Connect to the board's operating system and run commands on it
  • Install and upgrade the necessary libraries to interact with the board's component with Python
  • Run our first lines of Python code in the board

Setting up the board to work with Python as the programming language

There is some work to be done in order to start working with Python as the main programming language to control this board. We need the following additional elements that aren't included in the board's box:

  • A microSD card of at least 4 GB with a maximum supported capacity of 32 GB. It is convenient to use a speed class 4 or a faster microSD card. Note that you will lose all the contents of the microSD card.
  • A microSD to SD memory card adapter. The adapter is usually included within a microSD card's package.
  • A computer with an SD memory card reader. Most modern laptops and desktop computers include SD mermory card readers. However, in case you don't have one, you can buy a USB SD memory card reader and plug it to a free USB port in your computer. SD memory card readers are in fact read/write devices, and therefore, we can use them to write to a microSD card via the microSD to SD memory card adapter.
  • An...

Retrieving the board's assigned IP address

The board has finished the boot process with the Yocto Linux microSD card and is connected to our LAN throught the Ethernet port. The DHCP server has assigned the board an IP address and we need to know it in order to run commands on a Yocto Linux console. There are many ways for us to retrieve the board's assigned IP address. We will explore the different options and you can choose the most convenient one based on your LAN configuration.

If the board is connected to one of the Ethernet ports of a Wireless router and we have access to the router's Web interface, we can easily know the IP address assigned to the board. Some router's Web interfaces display the wired clients list. As our board is connected through an Ethernet wire, it will be listed as one of the wired clients and the device MAC address will match the MAC address printer in the adhesive label on the board's Ethernet jacket. The following picture shows the Wired...

Connecting to the board's operating system

Now, we need to use an SSH client to connect to the Yocto Linux running on the board and update some libraries that we will use to interact with the board's components and features. Both OS X and Linux include the ssh command in the Terminal. However, Windows doesn't include an ssh command and we have to install an SSH client.

In Windows, we can use the free and open source PuTTY SSH and telnet client. However, if you have any other preference for an SSH client in Windows, you can use any other software. The commands we execute in the terminal will be the same no matter what SSH client we use.

We can download and install PuTTY in Windows from http://www.putty.org or http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html. Once you install it, launch it and make sure you allow Windows firewall or any other installed firewall to open the necessary ports to make the connections. You will see warnings popping up depending on the...

Installing and upgrading the necessary libraries to interact with the board

Now, we will run many commands in the SSH client. Make sure that your SSH client is connected to the Yocto Linux SSH server running on the board as explained in the preceding section before running the commands. Specially, if you are working with either OS X or Linux, you have to make sure that you don't run the commands on your computer instead of doing this on the remote shell. Its simple, just make sure you always see the prompt root@galileo:~# before running any command.

Tip

Your board should be connected to a LAN with Internet access because we will download content from the Internet.

We will use the opkg utility to download and install the updated version of both the mraa and upm libraries. The mraa library, also known as libmraa, is a low level C/C++ library with bindings to Python that allows us to interface with the I/O features on the Intel Galileo Gen 2 board and other supported platforms. The upm library...

Installing pip and additional libraries

By default, the pip package management system that makes it easy to install and manage software packages written in Python isn't installed. We are going to use Python as our main programming language, and therefore, we will definitely benefit from installing pip.

Enter the following curl command to download the get-pip.py file from https://bootstrap.pypa.io, into the current folder.

curl -L "https://bootstrap.pypa.io/get-pip.py" > get-pip.py

You will see an output similar to the following lines that will indicate the download progress:

  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100 1379k  100 1379k    0     0   243k      0  0:00:05  0:00:05 --:--:--  411k

Once the download has finished, run python with get-pip.py as an argument.

python get-pip.py

You will see an ouput similar to the following lines that will indicate the installation...

Setting up the board to work with Python as the programming language


There is some work to be done in order to start working with Python as the main programming language to control this board. We need the following additional elements that aren't included in the board's box:

  • A microSD card of at least 4 GB with a maximum supported capacity of 32 GB. It is convenient to use a speed class 4 or a faster microSD card. Note that you will lose all the contents of the microSD card.

  • A microSD to SD memory card adapter. The adapter is usually included within a microSD card's package.

  • A computer with an SD memory card reader. Most modern laptops and desktop computers include SD mermory card readers. However, in case you don't have one, you can buy a USB SD memory card reader and plug it to a free USB port in your computer. SD memory card readers are in fact read/write devices, and therefore, we can use them to write to a microSD card via the microSD to SD memory card adapter.

  • An Ethernet cable.

  • An Ethernet...

Retrieving the board's assigned IP address


The board has finished the boot process with the Yocto Linux microSD card and is connected to our LAN throught the Ethernet port. The DHCP server has assigned the board an IP address and we need to know it in order to run commands on a Yocto Linux console. There are many ways for us to retrieve the board's assigned IP address. We will explore the different options and you can choose the most convenient one based on your LAN configuration.

If the board is connected to one of the Ethernet ports of a Wireless router and we have access to the router's Web interface, we can easily know the IP address assigned to the board. Some router's Web interfaces display the wired clients list. As our board is connected through an Ethernet wire, it will be listed as one of the wired clients and the device MAC address will match the MAC address printer in the adhesive label on the board's Ethernet jacket. The following picture shows the Wired-clients list in a router...

Connecting to the board's operating system


Now, we need to use an SSH client to connect to the Yocto Linux running on the board and update some libraries that we will use to interact with the board's components and features. Both OS X and Linux include the ssh command in the Terminal. However, Windows doesn't include an ssh command and we have to install an SSH client.

In Windows, we can use the free and open source PuTTY SSH and telnet client. However, if you have any other preference for an SSH client in Windows, you can use any other software. The commands we execute in the terminal will be the same no matter what SSH client we use.

We can download and install PuTTY in Windows from http://www.putty.org or http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html. Once you install it, launch it and make sure you allow Windows firewall or any other installed firewall to open the necessary ports to make the connections. You will see warnings popping up depending on the firewall software...

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Key benefits

  • Rapidly prototype even complex IoT applications with Python and put them to practical use
  • Enhance your IoT skills with the most up-to-date applicability in the field of wearable tech, smart environments, and home automation
  • Interact with hardware, sensors, and actuators and control your DIY IoT projects through Python

Description

Internet of Things (IoT) is revolutionizing the way devices/things interact with each other. And when you have IoT with Python on your side, you'll be able to build interactive objects and design them. This book lets you stay at the forefront of cutting-edge research on IoT. We'll open up the possibilities using tools that enable you to interact with the world, such as Intel Galileo Gen 2, sensors, and other hardware. You will learn how to read, write, and convert digital values to generate analog output by programming Pulse Width Modulation (PWM) in Python. You will get familiar with the complex communication system included in the board, so you can interact with any shield, actuator, or sensor. Later on, you will not only see how to work with data received from the sensors, but also perform actions by sending them to a specific shield. You'll be able to connect your IoT device to the entire world, by integrating WiFi, Bluetooth, and Internet settings. With everything ready, you will see how to work in real time on your IoT device using the MQTT protocol in python. By the end of the book, you will be able to develop IoT prototypes with Python, libraries, and tools.

Who is this book for?

The book is ideal for Python developers who want to explore the tools in the Python ecosystem in order to build their own IoT applications and work on IoT-related projects. It is also a very useful resource for developers with experience in other programming languages that want to easily prototype IoT applications with the Intel Galileo Gen 2 board.

What you will learn

  • Prototype and develop IoT solutions from scratch with Python as the programming language
  • Develop IoT projects with Intel Galileo Gen 2 board along with Python
  • Work with the different components included in the boards using Python and the MRAA library
  • Interact with sensors, actuators, and shields
  • Work with UART and local storage
  • Interact with any electronic device that supports the I2C bus
  • Allow mobile devices to interact with the board
  • Work with real-time IoT and cloud services
  • Understand Big Data and IoT analytics
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Publication date, Length, Edition, Language, ISBN-13
Publication date : May 20, 2016
Length: 388 pages
Edition : 1st
Language : English
ISBN-13 : 9781785881381
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Language : English
ISBN-13 : 9781785881381
Category :
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Table of Contents

12 Chapters
1. Understanding and Setting up the Base IoT Hardware Chevron down icon Chevron up icon
2. Working with Python on Intel Galileo Gen 2 Chevron down icon Chevron up icon
3. Interacting with Digital Outputs with Python Chevron down icon Chevron up icon
4. Working with a RESTful API and Pulse Width Modulation Chevron down icon Chevron up icon
5. Working with Digital Inputs, Polling and Interrupts Chevron down icon Chevron up icon
6. Working with Analog Inputs and Local Storage Chevron down icon Chevron up icon
7. Retrieving Data from the Real World with Sensors Chevron down icon Chevron up icon
8. Displaying Information and Performing Actions Chevron down icon Chevron up icon
9. Working with the Cloud Chevron down icon Chevron up icon
10. Analyzing Huge Amounts of Data with Cloud-based IoT Analytics Chevron down icon Chevron up icon
A. Exercise Answers Chevron down icon Chevron up icon
Index Chevron down icon Chevron up icon

Customer reviews

Top Reviews
Rating distribution
Full star icon Full star icon Full star icon Half star icon Empty star icon 3.7
(6 Ratings)
5 star 50%
4 star 0%
3 star 33.3%
2 star 0%
1 star 16.7%
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Olivier Lenoir Jul 09, 2019
Full star icon Full star icon Full star icon Full star icon Full star icon 5
Livre à lire pour le carte Intel Galileo 1 et 2.
Amazon Verified review Amazon
Kiran Dec 03, 2023
Full star icon Full star icon Full star icon Full star icon Full star icon 5
A detailed book to learn IOT
Amazon Verified review Amazon
Srikanth M Jan 06, 2019
Full star icon Full star icon Full star icon Full star icon Full star icon 5
Ok
Amazon Verified review Amazon
Hemant Solanki Jun 13, 2019
Full star icon Full star icon Full star icon Empty star icon Empty star icon 3
didn't like it.
Amazon Verified review Amazon
chinmoy ghosh Nov 01, 2016
Full star icon Full star icon Full star icon Empty star icon Empty star icon 3
BASE ON INTEL GALILEO... IF ITS ON RASPBERRY PI ITS MORE SWITABLE FOR ME
Amazon Verified review Amazon
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