DIY projects with Ruby & Pi

Ruby and RaspberryPi are available to us for quite sometime and this talk is meant to discuss how to use Ruby to explore things on a RaspberryPi.

From a practical point of view, we will go through installation, setup, and build a simple Motion Sensor application and a Time-Lapse Camera using RaspberryPi.

Transcript

1. DIY projects with
   Ruby & Pi
   Helio Cola
   @hacrods
   

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2. hac-rods.me
   Hi, I am Helio Cola!
   • ~17 years developing SW
   • ~7 years since I found happiness
   • ~6 years full time happiness
   • I go by @hacrods on the internet…
   

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3. Agenda
   • What is available
   • Buy, Install, Setup
   • Development Environment
   • Sensors & Gadgets & Projects
   

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4. What is available
   

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5. What is available
   • RaspberryPi: https://www.raspberrypi.org/
   • Parallella: https://www.parallella.org/
   

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6. What is available: RaspberryPi
   • RaspberryPi: https://www.raspberrypi.org/
   Raspberry Pi 0
   Raspberry Pi 1 Model A+
   Raspberry Pi 2 Model B
   Raspberry Pi 3 Model B
   Raspberry Pi 0 W(ireless)
   

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7. Pi 0
   Pi 1 A+
   Pi 2 B Pi 3 B
   

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8. Pi Zero vs Quarter
   

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9. Differences between the Pi’
   CPU RAM Display USB Others
   Pi 0 1Ghz,
   single-core
   512MB
   CSI (v1.2 only)
   and Mini HDMI
   USB On-The-
   Go ports
   Pi 0 W 1Ghz,
   single-core
   512MB
   CSI (v1.2 only)
   and Mini HDMI
   USB On-The-
   Go ports
   802.11n
   Pi 1 A+ 700Mhz 512MB HDMI
   One USB 2.0
   Port
   No Ethernet
   Low power 0.5W & 1W
   Pi 2 B 900MHz
   quad-core
   1GB
   CSI, DSI, Full
   HDMI
   4 USB 2.0
   ports
   Ethernet
   Pi 3 B 1.2GHz 64-bit
   quad-core
   1GB
   CSI, DSI, Full
   HDMI
   4 USB ports
   Ethernet, 802.11n,
   Bluetooth & BLE
   

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10. Differences between the Pi’
    Price Dimensions GPIO
    Pi 0 $5
    65mm long x 30mm wide x
    5mm thick
    HAT-compatible 40-pin
    header
    Pi 0 W $10
    65mm long x 30mm wide x
    5mm thick
    HAT-compatible 40-pin
    header
    Pi 1 A+ $24.95 65mm x 56mm 40 GPIO pins
    Pi 2 B $39.95 85.60mm × 56.5mm 40 GPIO pins
    Pi 3 B $39.95 86.9mm x 58.5mm x 19.1mm 40 GPIO pins
    

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11. What is available: Parallella
    • Parallella: https://www.parallella.org/
    Parallella Microserver (P1600)
    Parallella Desktop (P1601)
    Parallella Embedded (P1602)
    

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12. The differences
    CPU Price RAM HDMI USB GPIO
    Microserver
    18 cores
    667 MHz
    (max 1 GHz)
    $99 1GB RAM No 1 port No
    Desktop
    18 cores
    667 MHz
    (max 1 GHz)
    $149 1GB RAM Yes 1 port
    24
    ports
    Embedded
    18 cores
    667 MHz
    (max 1 GHz)
    $264.94 1GB RAM Yes 1 port
    48
    ports
    

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13. Buy, Install, Setup
    

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14. Where to buy
    • If you are near Pimoroni
    • If you are near Element14
    • If you are near Adafruit
    • If you are near “Amazon”
    • Otherwise: find Micro Center near you
    

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15. What to buy
    • Depend of what you are trying to do
    • The basics:
    Pi3 starter kit: board, case, power supply, heatsink, and micro
    SDHC
    Pi0 (W) starter kit: board, 2 micro USB to USB adaptor/cable, 4
    port USB hub, mini to full HDMI adaptor, and micro SDHC
    • Extras:
    Camera, sensors, 7” Touch screen display, Blinkt!, etc
    

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16. Pi3 Starter kit
    Reference: Amazon, CanaKit Raspberry Pi 3
    

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17. Pi0 Starter kit
    Reference: Amazon, Raspberry Pi Zero W Complete Starter Kit
    

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18. Sensors
    Reference: Amazon, KOOKYE 16 in 1 Smart Home Sensor Modules Kit
    

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19. 7” Touch Screen display
    https://www.element14.com/community/docs/DOC-78156/l/raspberry-pi-7-
    touchscreen-display
    

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20. Camera
    

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21. Blinkt!
    https://shop.pimoroni.com/products/blinkt
    

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22. Pi 3: Install, Setup
    • If your machine is Windows/Linux/Mac:
    https://developer.ubuntu.com/core/get-started/
    installation-medias
    • If your machine is Linux:
    https://ubuntu-mate.org/raspberry-pi/
    

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23. Pi 3: OS Download
    • Ubuntu Core, Ubuntu Mate, Windows 10 IoT Core
    Core: https://developer.ubuntu.com/core/get-started/
    raspberry-pi-2-3
    Mate: https://ubuntu-mate.org/download/
    Windows (still on my TODO list): http://ms-
    iot.github.io/content/en-US/Downloads.htm
    

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24. Pi 3: Installation on Mac
    • More or less these were my steps:
    1. Download the image, un-archive, insert SD card
    2. Run:
    

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25. Pi 3: Setup
    • First boot: it will take longer
    • It may automatically extend the file system (Core)
    • Or you will have to do it manually (Mate)
    • Follow the instructions on the display
    • Configure your network
    • And an administrator account
    

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26. Pi 3: On a TV
    

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27. Pi 3: On a touch screen
    

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28. Development Environment
    

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29. (My) Development Environment
    • UbuntuMate OS: a GUI on top an Ubuntu distribution
    • ruby 2.1.5p273 (2014-11-13) [arm-linux-gnueabihf]
    • rvm & ruby 2.5
    • Text Editor: vi or Mac/Atom/Git/RaspberryPi
    • Firefox: more than enough
    • A monitor or TV, keyboard and mouse
    

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30. 7” Touch Screen display
    

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31. 7” Touch Screen display
    

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32. 7” Touch Screen display
    

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33. Sensors
    

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34. PIR Motion Sensor
    

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35. Smoke and
    Combustible
    Gas
    

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36. Buzzer
    

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37. Carbon
    Monoxide
    

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38. Digital
    touch
    

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39. Flame
    

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40. Vibration
    

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41. Temperature
    and Humidity
    

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42. Sound
    

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43. Water level
    

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44. Motion Sensor App
    

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45. Motion Sensor App
    • My Hello World for RaspberryPi 3
    • Detect “movement”
    • Do something:
    • Call an API
    • Sound an alarm
    • Turn on the lights and play a music
    • Turn on the Camera &
    record it until no more
    presence
    • Reporte event + video
    

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46. Motion Sensor App
    Pi3 Rails App
    Local at your house,
    AWS, Heroku, etc
    Pi0W Front door
    Pi0W Back door
    Pi0W Game room
    

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47. Motion Sensor App
    What you will need:
    • Raspberry Pi3 starter kit
    • Camera
    • PIR motion sensor
    • 7” touch screen (optional)
    

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48. Motion Sensor App
    • Ruby as usual: rvm, ruby, rack, rails, rails-api,
    postgres, etc.
    Data model
    

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49. Motion Sensor App
    • CRUD admin app & api to allow events to come in
    

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50. PIR Motion Sensor
    

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51. PIR Motion Sensor
    Reference: https://cdn-learn.adafruit.com/downloads/pdf/pir-passive-infrared-proximity-motion-sensor.pdf
    Passive infrared
    Pyroelectric
    IR motion
    

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52. Monitoring the sensor
    Reference: https://github.com/jwhitehorn/pi_piper
    

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53. (My) Home monitoring system
    

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54. (My) Home monitoring system
    experiment
    • Left it running on my house for 2 months
    • A friend came by regularly to check the house
    • And walked through the sensor
    • And I monitored everything from the other side of
    the globe
    

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55. Time-Lapse Camera
    

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56. Time-Lapse Camera
    • Take pictures periodically
    • Blink lights
    Reference: https://projects.raspberrypi.org/en/projects/raspberry-pi-zero-time-lapse-cam
    

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57. Time-Lapse Camera
    What you will need:
    • Raspberry Pi0 starter kit
    • GPIO Hammer Header (solderless)
    • Blinkt (optional)
    • Camera
    • Reused cardboard box & sunglass
    • 5V Power pack
    

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58. Time-Lapse Camera
    

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59. Time-Lapse Camera
    

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60. Time-Lapse Camera
    

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61. Time-Lapse Camera
    DEMO TIME!!!
    

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62. References
    http://rayhightower.com/
    https://www.raspberrypi.org/
    https://www.parallella.org/
    https://developer.ubuntu.com/core/get-started/installation-medias
    https://ubuntu-mate.org/raspberry-pi/
    https://developer.ubuntu.com/core/get-started/raspberry-pi-2-3
    https://ubuntu-mate.org/download/
    http://ms-iot.github.io/content/en-US/Downloads.htm
    https://www.element14.com/community/docs/DOC-78156/l/raspberry-pi-7-
    touchscreen-display
    https://cdn-learn.adafruit.com/downloads/pdf/pir-passive-infrared-proximity-
    motion-sensor.pdf
    https://codingyoda.com/Raspberry-Pi-Email-PIR-Sensor.php
    https://github.com/jwhitehorn/pi_piper
    https://projects.raspberrypi.org/en/projects/raspberry-pi-zero-time-lapse-cam
    http://bit.ly/k8s-rpi
    

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63. Thank you!
    http://bit.ly/k8s-rpi
    Helio Cola
    @hacrods
    

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