[Forward4 Webinar 2016] Building IoT Prototypes w/ Raspberry Pi
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This document is a webinar presentation on building IoT prototypes using Raspberry Pi and PubNub. It covers topics such as sending and receiving data, wiring components, programming LEDs, and creating a remote-controlled LED interface. Additionally, it provides resources for further learning and examples of practical use cases for IoT applications.
![[Feb 2016] A Special Webinar for Forward4
Internet of Things 101:
Building IoT Prototypes w/ Raspberry Pi
Tomomi Imura (@girlie_mac)](https://image.slidesharecdn.com/raspberrypiwebinar-171022063713/85/Forward4-Webinar-2016-Building-IoT-Prototypes-w-Raspberry-Pi-1-320.jpg)
![[Forward4 Webinar 2016] Building IoT Prototypes w/ Raspberry Pi](https://image.slidesharecdn.com/raspberrypiwebinar-171022063713/85/Forward4-Webinar-2016-Building-IoT-Prototypes-w-Raspberry-Pi-27-320.jpg)
![[Forward4 Webinar 2016] Building IoT Prototypes w/ Raspberry Pi](https://image.slidesharecdn.com/raspberrypiwebinar-171022063713/85/Forward4-Webinar-2016-Building-IoT-Prototypes-w-Raspberry-Pi-29-320.jpg)
![Subscribing data to Raspberry Pi
pubnub = Pubnub(publish_key='demo', subscribe_key='demo')
channel = 'disco'
def _callback(m, channel):
if m['led'] == 1:
for i in range(6):
GPIO.output(LED_PIN,True)
time.sleep(0.5)
GPIO.output(LED_PIN,False)
time.sleep(0.5)
pubnub.subscribe(channels=channel, callback=_callback, error=_error)
Making it IoT:
Remote-Controlled LED
button.addEventListener
('click', publish);
As soon as a message is
published from a browser,
the message is subscribed
to Pi](https://image.slidesharecdn.com/raspberrypiwebinar-171022063713/85/Forward4-Webinar-2016-Building-IoT-Prototypes-w-Raspberry-Pi-44-320.jpg)
[Forward4 Webinar 2016] Building IoT Prototypes w/ Raspberry Pi
- 1. [Feb 2016] A Special Webinar for Forward4 Internet of Things 101: Building IoT Prototypes w/ Raspberry Pi Tomomi Imura (@girlie_mac)
- 2. Tomomi (@girlie_mac) ● Lead Dev Evangelist at PubNub ● Front-End Dev ● ❤ Hardware hacking ● Cat Lady of the InterWeb
- 3. What You Will Learn Today 1. Internet of Things and Data Stream 2. How to send & receive data with PubNub using Python 3. How to wire a LED & resistor to Pi using breadboard 4. How to program Pi to blink the LED 5. Making it IoT : Remote-controlled LED from web interface
- 4. Era of Internet of Things Source: PLATFORM, data based on Cisco IBSG Estimate 50B by 2020 non-human/human = 6.58 2003: non-human/human = 0.08 2015: non-human/human = 3.47 2008: non-human/human >= 1
- 5. Withings: Smart Body Analyzer GE Link Cinder Sensing Cooker Nest: Learning Thermostat Whistle: Connected pet collar Amazon Dash Button Smart Devices
- 8. Internet of Things with Data Stream Send & Receive Data to/from Data Center via Internet
- 9. PubNub Data Stream Two-way communication to/from every device in the world. https://pubnub.com Realtime Reliable Secure PubNub is globally distributed realtime data stream network (DNS)
- 10. PubNub Use-Cases ◼ Chat (Periscope) ◼ Multi-player games (DeNA games) ◼ Vehicle Location Tracking (Lyft, GetTaxi) ◼ Financial data (TD Ameritrade) ◼ Collaborative teaching tools (ClassDojo, CodePen) ◼ IoT, Smart Home (Insteon, Logitech)
- 11. Prototyping Internet of Things Send & Receive Data to/from Data Center via Internet LED
- 12. 6. USB TO POWER SOURCE 5. TO MONITOR 4. TO MOUSE 3. TO KEYBOARD 2. WI-FI ADAPTER 1. SD CARD Getting Started with Raspberry Pi
- 14. Raspbian OS
- 15. SSH into your Rasp Pi 1. Get your Raspberry Pi’s IP address pi@raspberrypi ~$ hostname -I
- 16. 2. SSH to Pi from your laptop (Terminal on Mac/Linux, PuTTY on Windows): me@MyMac ~$ ssh pi@10.96.70.1 SSH into your Rasp Pi Use your Pi’s IP! Your Pi’s username If SSH-ing fails, try: $ sudo raspi-config on your Pi
- 17. Programming Rasp Pi Pre-installed on Raspberry Pi: C / C++
- 18. Get Started w/ Python Update your system first ~$ sudo apt-get update ~$ sudo apt-get upgrade Install python and pip ~$ sudo apt-get install python-dev ~$ sudo apt-get install python-pip
- 19. Wut, you want Node.js? ~$ wget http://node-arm.herokuapp.com/node_latest_ armhf.deb ...but we’re using python today! Don’t worry, I’m a JS dev too :-)
- 20. Installing PubNub ~$ sudo pip install pubnub
- 22. Hello World w/ PubNub Import & init (hello.py) import sys from pubnub import Pubnub pubnub = Pubnub(publish_key='demo', subscribe_key='demo') Use your own publish & subscribe keys!
- 23. Hello World w/ PubNub Publish (Sending data) channel = 'hello-pi' data = { 'username': 'Grumpy Cat', 'message': 'Hello world from Pi!'} def callback(m): print(m) pubnub.publish(channel, data, callback=callback, error=callback)
- 24. Hello World w/ PubNub Run your program ~$ sudo python hello.py
- 25. Debug Console http://pubnub.com /console/ 1. channel: hello-pi 2. pub key: demo 3. sub key: demo
- 26. https://github.com/pubnub/ workshop-raspberrypi/tree/master/ projects-python/led Hello World of Hardware: Blinking LED
- 28. 1. Raspberry Pi 2 (w/ a WiFi Adapter for later exercise) 2. 1 Breadboard 3. 2 Male/Female jumper wires, 2 colors 4. 1 Resistor (200Ω) 5. 1 LED (1.9 - 3.2V) What you need
- 30. OMG Physics! Cathode (-) Anode (+) - + 1.9V 3.2V - +
- 31. OMG Physics! R = V - Vs f I source voltage (V) forward voltage (V) (LED voltage drop) current thru the LED (A) resistance (Ω)
- 32. OMG Physics! R = 3.3v - 1.9v 0.02 A source voltage (V) forward voltage (V) (Red LED voltage drop) current thru the LED (A) resistance (Ω) = 70 Ω
- 33. 4-band Resistor Color Code 47 x 100 = 4.7 k Ohms 4 7 102 +/- 5% multiplier tolerance Learn more at: https://learn.adafruit.com/multimeters/resistance
- 34. 5-band Resistor Color Code 200 x 1 = 200 Ohms 2 0 100 +/- 1% multiplier tolerance Learn more at: https://learn.adafruit.com/multimeters/resistance 0
- 35. Breadboard 400-pinMini We are using this kind today! You may find this type of breadboard when googling circuits. They have power rails that goes vertical! not connected ! An electronics breadboard is a fundamental tool to build circuits. It is solderless, and great tool for prototyping. conductive metal strips goes horizontally Connected!
- 36. Turning LED on 3.3V (Raspberry Pi) LED
- 37. Turning LED on 3.3V (Pin 1) GND Anode (longer leg) Cathode
- 38. Raspberry Pi 2 Pins 3.3V Ground GPIO (general purpose input output)
- 39. Programming LED GPIO-4 (Pin 7)
- 40. Programming LED import RPi.GPIO as GPIO import time GPIO.setmode(GPIO.BCM) LED = 4 GPIO.setup(LED,GPIO.OUT) for i in range(6): GPIO.output(LED,True) time.sleep(0.5) GPIO.output(LED,False) time.sleep(0.5) import RPi.GPIO libs set pin type. use BCM, not pin number GPIO 4 pin (Pin 7) set LED pin as output toggle light pin signal to low/high to make it blink. 7 times.
- 42. Making it IoT: Remote-Controlled LED publish data subscribe data
- 43. Publishing data from a web client var pubnub = PUBNUB.init({ subscribe_key: 'demo', publish_key: 'demo' }); button.addEventListener('click', function(){ pubnub.publish( {channel: 'disco', message: {led: 1}} ); }); Making it IoT: Remote-Controlled LED When the button is clicked on browser, it publishes data, {‘led’: 1}
- 44. Subscribing data to Raspberry Pi pubnub = Pubnub(publish_key='demo', subscribe_key='demo') channel = 'disco' def _callback(m, channel): if m['led'] == 1: for i in range(6): GPIO.output(LED_PIN,True) time.sleep(0.5) GPIO.output(LED_PIN,False) time.sleep(0.5) pubnub.subscribe(channels=channel, callback=_callback, error=_error) Making it IoT: Remote-Controlled LED button.addEventListener ('click', publish); As soon as a message is published from a browser, the message is subscribed to Pi
- 46. IoT & PubNub Case Study: Insteon http://www.insteon.com
- 47. Data Visualization with Temperature Sensor It uses a capacitive humidity sensor and a thermistor to measure the surrounding air, and spits out a digital signal on the data pin. https://github.com/pubnub/workshop -raspberrypi/tree/master/projects-pyt hon/dht22 http://pubnub.github.io/workshop -raspberrypi/web/temperature.ht ml
- 48. Realtime Data Graphs & Charts https://github.com/pubnub/eon-chart
- 49. Resources ◼ Raspberry Pi - https://www.raspberrypi.org/ ◼ PubNub - https://pubnub.com ◼ Step-by-step instructions & Code sample on GitHub - https://github.com/pubnub/workshop-raspberrypi ◼ This slide deck: https://goo.gl/NHIkJe
- 50. Thank you :-) Tomomi Imura (@girlie_mac) https://www.pubnub.com/blog/author/tomomi/ http://girliemac.com Tuts+ Node.js & Arduino tutorial: http://goo.gl/LTtPn4
- 51. Creative Commons Attributions ◼ LED circuit: Wikimedia ◼ GPIO Pins: RaspberryPi-Spy.co.uk Also, great public domain images from Pixabay, and an open-source software, Fritzing for circuit diagrams!