DIY: Home monitoring with Rails & RaspberryPi

In a world we teach ourselves a lot of things, why not do it Ruby-on-Rails-on-Pi way? Let’s get our hands on a piece of hardware, understand what it takes to setup one up, install a couple of libraries, Ruby, RVM, RBENV, a GUI. Let’s get a couple of sensors: motion, temperature, humidity, tsunami, ectoplasm and see if we detect a cool thing or two. Let's discuss how we can use what we know about Rails to explore things on a RaspberryPi. From a practical point of view, we will go through installation, setup, and build a monitoring Motion Sensor application on a RaspberryPi.

Transcript

1. RailsConf 2017 - Phoenix, AZ Helio Cola @hacrods DIY: Home monitoring with Ruby & Pi
2. RailsConf 2017 - Phoenix, AZ hac-rods.me Hi, I am Helio Cola! • ~16 years developing SW • ~7 years since I found happiness • ~6 years full time happiness • I go by @hacrods on the internet…
3. RailsConf 2017 - Phoenix, AZ Agenda • OS installation • Why Raspberry Pi • What & Where to buy • Motion Sensor app • List of Sensors • Building Blocks • Exercises
4. RailsConf 2017 - Phoenix, AZ Exercises • OS installation: Raspbian • Capture images • Capture videos • Motion & Digital touch sensor • Buzzer Lite & Buzzer • Detect presence & record a video • Other sensors
5. RailsConf 2017 - Phoenix, AZ References • This presentation: https://speakerdeck.com/heliocola • Repo with building blocks: https://github.com/heliocola/rpi-bb
6. RailsConf 2017 - Phoenix, AZ OS installation
7. RailsConf 2017 - Phoenix, AZ OS installation Options • Raspbian • Ubuntu Core • Ubuntu Mate • Others: like Windows IOT
8. RailsConf 2017 - Phoenix, AZ OS installation Steps for Raspbian: • Format SDHC SD formatter tool: https://www.sdcard.org/downloads/formatter_4/ • Copy NOOBS to the SDHC Download link: https://downloads.raspberrypi.org/NOOBS_latest • Put SDHC in the PI, power up, and follow the instructions Instructions can be found: <NOOBS_FOLDER>/INSTRUCTIONS-README.txt So, let’s do that!!! :)
9. RailsConf 2017 - Phoenix, AZ OS installation References for Ubuntu Core/Mate/Windows • Ubuntu Core: https://developer.ubuntu.com/core/get-started/raspberry-pi-2-3 • Ubuntu Mate: https://ubuntu-mate.org/download/ • Windows: http://ms-iot.github.io/content/en-US/Downloads.htm * If you are interested in one of these OSes, I have some more info I can share: @hacrods
10. RailsConf 2017 - Phoenix, AZ OS setup (raspbian) Setup steps: 1. Turn off bluetooth 2. Change keyboard to US 3. Enable SSH & Camera 4. Install MP4 Video format: $ sudo apt-get install -y gpac 5. Set static IP address: 5.1. sudo vi /etc/dhcpcd.conf 5.2. Paste at the end interface wlan0 static ip_address=192.168.1.205/24 static routers=192.168.1.1 static domain_name_servers=192.168.1.1
11. RailsConf 2017 - Phoenix, AZ Why Raspberry Pi
12. RailsConf 2017 - Phoenix, AZ Why RaspberryPi & Parallella • Because of Ray Hightower (@RayHightower), Julian Cheal (@juliancheal), and Chris (@crsexton) and Leah Sexton • Because they put a curiosity bug on my head • Because I was bored • And I’ve been doing some renovations at my house
13. RailsConf 2017 - Phoenix, AZ What & Where to buy
14. RailsConf 2017 - Phoenix, AZ What to buy • Depend of what you are trying to do • The basics: Starter kit (Pi 3, case, power supply, heatsink) and Micro SDHC • Extras: Camera, sensors, 7” Touch screen display Other gadgets
15. RailsConf 2017 - Phoenix, AZ What to buy: RaspberryPi RaspberryPi: https://www.raspberrypi.org/ • Raspberry Pi Zero W • Raspberry Pi 1 Model A+ • Raspberry Pi 2 Model B • Raspberry Pi 3 Model B
16. RailsConf 2017 - Phoenix, AZ Pi Zero Pi 1 A+ Pi 2 B Pi 3 B
17. RailsConf 2017 - Phoenix, AZ Pi Zero vs Quarter
18. RailsConf 2017 - Phoenix, AZ Pi 3 Case vs Quarter
19. RailsConf 2017 - Phoenix, AZ Differences between the Pi’ CPU RAM Display USB Others Pi Zero W 1Ghz, Single-core CPU 512MB RAM CSI (v1.2 only) and Mini HDMI USB On-The-Go ports Half the size of a Model A+, with twice the utility Pi 1 A+ 700Mhz ARM CPU 512MB RAM HDMI One USB 2.0 Port No Ethernet Low power 0.5W and 1W Pi 2 B A 900MHz quad- core ARM Cortex- A7 CPU 1GB RAM CSI, DSI, Full HDMI 4 USB 2.0 ports Ethernet Pi 3 B 1.2GHz 64-bit quad-core ARMv8 CPU 1GB RAM CSI, DSI, Full HDMI 4 USB ports Ethernet, 802.11n, Bluetooth & BLE
20. RailsConf 2017 - Phoenix, AZ Differences between the Pi’ Price Dimensions GPIO Pi Zero 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 40 GPIO pins Pi 3 B $39.95 86.9mm x 58.5mm x 19.1mm 40 GPIO pins
21. RailsConf 2017 - Phoenix, AZ What to buy: Parallella • Parallella: https://www.parallella.org/ Parallella Microserver (P1600) Parallella Desktop (P1601) Parallella Embedded (P1602)
22. RailsConf 2017 - Phoenix, AZ The differences CPU Price RAM HDMI USB GPIO Microserver 18 cores Zynq Z7010 667 MHz (max 1 GHz) $99 1GB RAM No 1 port No Desktop 18 cores Zynq Z7010 667 MHz (max 1 GHz) $149 1GB RAM Yes 1 port 24 ports Embedded 18 cores Zynq Z7020 667 MHz (max 1 GHz) $264.94 1GB RAM Yes 1 port 48 ports
23. RailsConf 2017 - Phoenix, AZ Buy: where • Micro center near you • else if you are near Element14: buy it • else if you are near Adafruit: buy it • else (if) you are near Amazon: buy it
24. RailsConf 2017 - Phoenix, AZ Pi 3: On a TV
25. RailsConf 2017 - Phoenix, AZ Pi 3: On a touch screen
26. RailsConf 2017 - Phoenix, AZ Motion Sensor App
27. RailsConf 2017 - Phoenix, AZ Motion Sensor App • My Hello World for RaspberryPi • 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 (or 5-10s) • Report event + video
28. RailsConf 2017 - Phoenix, AZ Motion Sensor App Pi 0 W: front door Pi 0 W: back door Pi 0 W: game room Or Heroku, AWS, Digital Ocean, etc Pi 3: local server
29. RailsConf 2017 - Phoenix, AZ Motion Sensor App • Ruby as usual: rvm, ruby, rack, rails, rails-api, postgres, etc. Data model
30. RailsConf 2017 - Phoenix, AZ PIR Motion Sensor
31. RailsConf 2017 - Phoenix, AZ PIR Motion Sensor • Reference: https://cdn-learn.adafruit.com/downloads/pdf/pir-passive-infrared-proximity-motion-sensor.pdf Passive infrared Pyroelectric IR motion
32. RailsConf 2017 - Phoenix, AZ Monitoring a PIR sensor Reference: https://github.com/jwhitehorn/pi_piper
33. RailsConf 2017 - Phoenix, AZ List of Sensors
34. RailsConf 2017 - Phoenix, AZ PIR Motion Sensor
35. RailsConf 2017 - Phoenix, AZ Smoke and Combustible Gas
36. RailsConf 2017 - Phoenix, AZ Buzzer
37. RailsConf 2017 - Phoenix, AZ Carbon Monoxide
38. RailsConf 2017 - Phoenix, AZ Digital touch
39. RailsConf 2017 - Phoenix, AZ Flame
40. RailsConf 2017 - Phoenix, AZ Vibration
41. RailsConf 2017 - Phoenix, AZ Temperature and Humidity
42. RailsConf 2017 - Phoenix, AZ Sound
43. RailsConf 2017 - Phoenix, AZ Water level
44. RailsConf 2017 - Phoenix, AZ Exercises
45. RailsConf 2017 - Phoenix, AZ Exercises: building blocks • General Purpose Input and Output pins: aka GPIO • (binary) raspistill: capture photos • (binary) raspivid: capture videos • (gem) pi_piper: read and write from/to GPIO Reference: https://github.com/heliocola/rpi-bb
46. RailsConf 2017 - Phoenix, AZ Building block: GPIO • It is a generic pin in the raspberry board that allows you to control and integrate with the outside world at run time. • Read something from the world • Or Write something to the world Reference: https://www.raspberrypi.org/documentation/usage/gpio-plus-and-raspi2/README.md
47. RailsConf 2017 - Phoenix, AZ Building block: GPIO • Reference: http://blog.mcmelectronics.com/ post/Raspberry-Pi-3-GPIO-Pin-Layout#.WP5- u1PyslU
48. RailsConf 2017 - Phoenix, AZ Building block: raspistill • Reference: https://www.raspberrypi.org/documentation/usage/camera/raspicam/raspistill.md
49. RailsConf 2017 - Phoenix, AZ Building block: raspivid • Reference: https://www.raspberrypi.org/documentation/usage/camera/raspicam/raspivid.md MP4Box: Install: $ sudo apt-get install -y gpac Run: $ MP4Box -add pivideo.h264 pivideo.mp4
50. RailsConf 2017 - Phoenix, AZ Building block: pi_piper • Reference: https://github.com/jwhitehorn/pi_piper Read from a GPIO
51. RailsConf 2017 - Phoenix, AZ Building block: pi_piper • Reference: https://github.com/jwhitehorn/pi_piper Write to a GPIO
52. RailsConf 2017 - Phoenix, AZ Army of Pi Zero W & a Pi3 • Pi Zero 1.3 (raspberry): ssh pi@192.168.1.199 • Pi 3 (raspberry): monitor/mouse/keyboard ssh kraken@192.168.1.206 • List of Pi Zero's (W): raspberry ssh pi@192.168.1.200 ssh pi@192.168.1.201 ssh pi@192.168.1.202 ssh pi@192.168.1.203 ssh pi@192.168.1.204 ssh pi@192.168.1.205 (case)
53. RailsConf 2017 - Phoenix, AZ Rules for accessing the Pis • Create folder with your name • If there is already one, add _1, _2, etc • Do not delete folder that you haven’t created • The Pi’s don’t have access to the internet
54. RailsConf 2017 - Phoenix, AZ Army of Pi Zero W & a Pi3 Wifi to access the Raspberry Pi’s: SSID: RailsConf2017_Pi Security: WPA/WPA2 Personal Passphrase: raspberrypi2017
55. RailsConf 2017 - Phoenix, AZ Exercise: capture a photo Use raspistill utility to capture a photo from the camera • Building block: Raspistill • Reference: https://www.raspberrypi.org/documentation/usage/camera/raspicam/raspistill.md
56. RailsConf 2017 - Phoenix, AZ Exercise: capture a video Use raspivid utility to capture a video from the camera Limit the video to 5 seconds as the test Raspberry PI only have 32Gb micro disk • Building block: Raspivid • Reference: https://www.raspberrypi.org/documentation/usage/camera/raspicam/raspivid.md
57. RailsConf 2017 - Phoenix, AZ Exercise: Motion & Digital touch sensor Use the motion (PIR) or digital touch sensor to trigger a presence event • Building block: GPIO Use GPIO 4 to read input sensor • Reference: https://github.com/jwhitehorn/pi_piper
58. RailsConf 2017 - Phoenix, AZ Exercise: Lite Buzzer & Buzzer Lite Buzzer: turn on and off the buzzer by writing to a GPIO Buzzer: read value from motion (or digital touch) sensor and turn on/off the buzzer • Building block GPIO Use GPIO 4 to read from a sensor Use GPIO 17 to write to the buzzer • Reference: https://github.com/jwhitehorn/pi_piper
59. RailsConf 2017 - Phoenix, AZ Exercise: Detect Presence & record a video When you detect a presence (motion or digital touch) start recording a video for a small period of time • Building blocks: Raspivid GPIO Use GPIO 4 to read from a sensor Use GPIO 17 to write to the buzzer
60. RailsConf 2017 - Phoenix, AZ References https://github.com/heliocola/rpi-bb http://rayhightower.com/ http://juliancheal.co.uk http://www.codeography.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://github.com/jwhitehorn/pi_piper http://bit.ly/k8s-rpi
61. RailsConf 2017 - Phoenix, AZ http://bit.ly/k8s-rpi Helio Cola @hacrods Thank you! Any questions?