Raspberry Pi Computing: Temperature Measurement

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Last updated on 2018-04-12

About the Book

If you've heard about the Raspberry Pi you may know that it provides a fantastic method to learn about using a computer and to develop some skills that go beyond the basics.

What sort of things will we learn?

Good question!

What sort of versions of the Raspberry Pi are there?
What hardware do I need to get it up and going?
What sort of operating systems are there and how do we install them?
How do I do [Insert any number of cool things]?

Is this book for you?

It's not written for experts. It's put together as a guide to get you started if you're unsure about how to make the first move with a Raspberry Pi.

Why has the book been written?

Because in the process of learning things, it's a great way to remember them if you write them down :-).

Writing about how to do cool stuff with computers means that we're accumulating ways to help ourselves out when the going gets tricky. Making a book out of the information is a no-brainer since that way more people benefit from the process.

The awesome that is Leanpub.

The book has some information in it, but there's still a bit more to come. Publishing using Leanpub will allow readers to get easy notification of when updates and improvements are made.

Enjoy.

So we hope you get something out of the book, please excuse the sometimes light-hearted conversational manner in which we approach the topic and enjoy the Raspberry Pi!

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Malcolm Maclean

I have a passion for knowledge and I realise that part of the responsibility of gathering knowledge is being able to advance the state of the human condition in some way.

My aims in writing these books are to play with software, achieve personal goals and try something new for fun. It also helps that I think Open Source, technology, the visual representation of data and information rock in serious ways.

The books that I write are a mechanism to support my own learning, so the way I explain things is focused on trying to impart understanding in a simple but functional way.

I'm totally in awe of the Open Source community that has made this type of work possible. If you feel that you would like to support continued development of this content, feel free to donate when you download.

If you're looking for a hard copy version of any of these publications, they will be available through Amazon (not all will be available sorry).

Raspberry Pi Computing

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Introduction
- Welcome!
- What are we trying to do?
- Who is this book for?
- What will we need?
- Why on earth did I write this rambling tome?
- Where can I get more information?
The History of the Raspberry Pi
Raspberry Pi Versions
- Raspberry Pi B+, 2 B and 3 B
  - USB Ports
  - Video Out
  - Ethernet Network Connection
  - USB Power Input Jack
  - MicroSD Flash Memory Card Slot
  - Stereo and Composite Video Output
  - 40 Pin Header
Raspberry Pi Peripherals
- SD Card
- Keyboard / Mouse
- Video
- Network
- Power supply
- Cases
Operating Systems
- Welcome to Raspbian
  - Downloading
  - Writing the Operating System image to the SD Card
  - Powering On
  - The Command Line interface
    - Raspberry Pi Software Configuration Tool
    - Software Updates
Power Up the Pi
- Static IP Address
  - The Netmask
    - CIDR Notation
  - Distinguish Dynamic from Static
  - Default Gateway
  - Lets edit the dhcpcd.conf file
- Remote access
  - Remote access via SSH
    - Setting up the Server (Raspberry Pi)
    - Setting up the Client (Windows)
- Setting up a WiFi Network Connection
  - Built in WiFi Enabling
    - Make the changes operative
    - Make the built in WiFi IP address static
    - Make the changes operative
  - WiFi Via USB Dongle
    - Editing files
    - Make the changes operative
    - Make the built in WiFi IP address static
    - Make the changes operative
- Reconnecting to the wireless network automatically
  - Let’s write a script
  - Lets run our script on a regular schedule
  - Let’s test it
Setting up the Raspberry Pi Software
- Web Server, PHP and Database
  - Install NGINX and PHP
    - Configuration
  - Database
  - Installing phpMyAdmin
  - Create users for the database
  - Create a database
  - Database preparation
Multiple Temperature Measurements
- The DS18B20 Sensor
- Measure
  - Hardware required
  - Connect
  - Enable
  - Test
- Record
  - Record the temperature values
    - Code Explanation
  - Recording data on a regular basis with cron
- Explore
  - The Code
    - PHP
  - HTML
    - CSS
  - JavaScript and d3.js
    - Setting up the margins and the graph area.
    - Getting the Data
    - Formatting the Date / Time.
    - Setting Scales Domains and Ranges
    - Setting up the Axes
    - Adding data to the line function
    - Adding the SVG area.
    - Data Wrangling!
    - Add the axes
- Wrap Up
Linux Concepts
- What is Linux?
- Linux Directory Structure
  - /
  - /bin
  - /boot
  - /dev
  - /etc
  - /etc/cron.d
  - /etc/rc?.d
  - /home
  - /lib
  - /lost+found
  - /media
  - /mnt
  - /opt
  - /proc
  - /root
  - /sbin
  - /srv
  - /tmp
  - /usr
  - /usr/bin
  - /usr/lib
  - /usr/local
  - /usr/sbin
  - /var
  - /var/lib
  - /var/log
  - /var/spool
  - /var/tmp
- Everything is a file in Linux
  - Traditional Files
  - Directories
  - System Information
  - Devices
File Editing
- The nano Editor
Linux Commands
- Executing Commands in Linux
- The Commands
  - - Options
    - Arguments
    - Putting it all together
  - apt-get
    - The apt-get command
    - apt-get update
    - apt-get upgrade
    - apt-get install
    - apt-get remove
  - cat
    - The cat command
    - Options
    - Arguments and Examples
    - Test yourself
  - cd
    - The cd command
    - Options
    - Arguments
    - Examples
    - Test yourself
  - chmod
    - The chmod command
    - Options
    - Arguments
    - Examples
  - crontab
    - The crontab command
    - Options
    - Examples
    - Test yourself
  - ifconfig
    - The ifconfig command
    - Options
    - Arguments
    - Test yourself
  - ls
    - The ls command
    - Options
    - Arguments
    - Examples
  - modprobe
    - The modprobe command
    - Options
    - Arguments
    - Test yourself
  - ping
    - The ping command
    - Options
    - Test yourself
  - sudo
    - The sudo command
    - The ‘sudoers’ file
    - sudo vs su
    - Test yourself
Directory Structure Cheat Sheet

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