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Raspberry Pi Computing: Analog Measurement

Measure, record and present data using analog sensors with a Raspberry Pi computer

Malcolm Maclean

Raspberry Pi Computing: Analog Measurement aims to provide a full description of the process of setting up a Raspberry Pi computer to measure and record analog values using different sensors and an A to D converter. We'll look at different versions of the Pi, along with loading and configuring the software required with some basic Linux use.

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About

About

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 system do I need and how do we install it.
  • 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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Raspberry PiPythonComputers and Programming

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Author

About the Author

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).

Contents

Table of Contents

Introduction

  1. Welcome!
  2. What are we trying to do?
  3. Who is this book for?
  4. What will we need?
  5. Why on earth did I write this rambling tome?
  6. Where can you get more information?

The History of the Raspberry Pi

Raspberry Pi Versions

  1. Version Comparison

Raspberry Pi Peripherals

  1. SD Card
  2. Keyboard / Mouse
  3. Video
  4. Network
  5. Power supply
  6. Cases

Operating Systems

  1. Welcome to Raspberry Pi OS
  2. Raspberry Pi OS and Raspbian
  3. Operating System Evolution
  4. Downloading
  5. Writing the Operating System image to the SD Card
  6. Enabling Secure Shell Access
  7. Powering On
  8. The Command Line interface
  9. Raspberry Pi Software Configuration Tool
  10. Software Updates

Power Up the Pi

  1. Static IP Address
  2. The Netmask
  3. CIDR Notation
  4. Distinguish Dynamic from Static
  5. Default Gateway
  6. Lets edit the dhcpcd.conf file
  7. Remote access
  8. Remote access via SSH
  9. Setting up the Server (Raspberry Pi)
  10. Setting up the Client (Windows)
  11. WinSCP
  12. Setting up a WiFi Network Connection
  13. Built in WiFi Enabling
  14. Make the changes operative
  15. Make the built in WiFi IP address static
  16. Make the changes operative
  17. Reconnecting to the wireless network automatically
  18. Let’s write a script
  19. Lets run our script on a regular schedule
  20. Let’s test it

Setting up the Raspberry Pi Software

  1. Web Server, PHP and Database
  2. Install NGINX and PHP
  3. Configuration
  4. Database
  5. Create a database and a table

Connecting Analog Sensors to the Raspberry Pi

  1. Analog and Digital
  2. Analog
  3. Digital
  4. The Boards
  5. The Analog Sensor
  6. The Light Dependant Resistor (LDR or Photoresistor)
  7. Analog to Digital Conversion (ADC)
  8. The ADS1015 Analog to Digital Converter
  9. Measure
  10. Hardware required
  11. Connect
  12. Test
  13. Record
  14. Record the readings
  15. Recording data on a regular basis with cron
  16. Managing database size
  17. Explore
  18. Simple data point API
  19. Extracting a Range of Data
  20. Wrap Up
  21. Bibliography

Linux Concepts

  1. What is Linux?
  2. Linux Directory Structure
  3. /
  4. /bin
  5. /boot
  6. /dev
  7. /etc
  8. /etc/cron.d
  9. /etc/rc?.d
  10. /home
  11. /lib
  12. /lost+found
  13. /media
  14. /mnt
  15. /opt
  16. /proc
  17. /root
  18. /sbin
  19. /srv
  20. /tmp
  21. /usr
  22. /usr/bin
  23. /usr/lib
  24. /usr/local
  25. /usr/sbin
  26. /var
  27. /var/lib
  28. /var/log
  29. /var/spool
  30. /var/tmp
  31. Everything is a file in Linux
  32. Traditional Files
  33. Directories
  34. System Information
  35. Devices

File Editing

  1. The nano Editor

Linux Commands

  1. Executing Commands in Linux
  2. The Commands
  3. Options
  4. Arguments
  5. Putting it all together
  6. apt-get
  7. The apt-get command
  8. apt-get update
  9. apt-get upgrade
  10. apt-get install
  11. apt-get remove
  12. cat
  13. The cat command
  14. Options
  15. Arguments and Examples
  16. Test yourself
  17. cd
  18. The cd command
  19. Options
  20. Arguments
  21. Examples
  22. Test yourself
  23. chmod
  24. The chmod command
  25. Options
  26. Arguments
  27. Examples
  28. crontab
  29. The crontab command
  30. Options
  31. Examples
  32. Test yourself
  33. ifconfig
  34. The ifconfig command
  35. Options
  36. Arguments
  37. Test yourself
  38. ls
  39. What’s the information in the long list format?
  40. The ls command
  41. Options
  42. Arguments
  43. Examples
  44. ping
  45. The ping command
  46. Options
  47. Test yourself
  48. sudo
  49. The sudo command
  50. The ‘sudoers’ file
  51. sudo vs su
  52. Test yourself

Directory Structure Cheat Sheet

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