Internet of things

• Lots of Javascript and Node topics
  
• 3 tracks
  
• One breakout day
• Lots of creators and inventors were there
• Run by Chris Williams of Node Source,
  inventor of Node-Serial
• Companies presenting included Google, Facebook, Microsoft, Fidelity, Bithound, Mozilla, Paypal, Twilio and Sauce Labs

• Please recite the following oath with the presenter
• If I _state_your_name_ electrocute myself after trying to replicate something from this presentation, I swear that neither I nor any loved ones or members of my extended family will sue this presenter pursuant to all Federal, state and local laws, including those in international and intergalactic jurisdictions.   

• Internet of Things
• This is about wanting to program hardware
• The components for building your own hardware has become very inexpensive
• Getting to the point where almost any device can have its own IP address

• Desktop Computers
• Mobile devices
• Smart watches
• Wi-Fi enabled microcontrollers
• Thermostats, Nest
• Refrigerators, (SAMSUNG)

• Not computers
  
• Write programs as firmware
  
• Some come with Wi-Fi
• Inputs and outputs
• Digital and Analog
• Not enough power to stream video or audio
• Wire up servos, lights, sensors, speakers and cameras
• Power robots

• Introduced in 2005
• Connect to USB
• 12 Digital pins, 6 Analog
• All kinds of shield modules
• Firmware written in C, C++

• Wi-Fi chip built-in
• ARM processor
• Always connected cloud service
• Web based IDE, C and C++
• New node compatible firmware

• Introduced in 2013
• Javascript based microcontroller
• Does not run V8 or node
• Does not have Wi-Fi, but can be added
• 72Mhz ARM microcontroller with
  256KB of Flash memory and 48KB of RAM

• Released June 2014 supposedly
• Runs Node code
• Has modules, reduces the need to solder or breadboard
• Wi-Fi CC3000 built into board
• Modules include Servo interface, GPS, GPRS, Bluetooth, accelerometer, climate, camera, infrared and SD Card reader

• Modeled after Arduino
• Runs .NET code
• .NET micro framework
• Can use this with Linux and Mac OS X

• Full computer with ARM processor
• Runs different versions of Linux
• HDMI output, 2 USB ports, Ethernet
• GPIO digital ports, no analog ports
• Model a/b, 256 and 512 MB RAM
• Runs Node.js

• Most boards and standard firmware are open source
• Many knockoffs of the Arduino, ATMega chip
• ARM Microprocessors are becoming common
• Common to see these on Kickstarter
•  Intel Edison SoC will run Node.js 70 pins

• Requires void setup() and void loop() methods

// Pin 13 has an LED connected on most Arduino boards.
            // give it a name:
            int led = 13;

            // the setup routine runs once when you press reset:
            void setup() {                
            // initialize the digital pin as an output.
            pinMode(led, OUTPUT);     
            }

            // the loop routine runs over and over again forever:
            void loop() {
            digitalWrite(led, HIGH);   // turn the LED on (HIGH is the voltage level)
            delay(1000);               // wait for a second
            digitalWrite(led, LOW);    // turn the LED off by making the voltage LOW
            delay(1000);               // wait for a second
            }

• Rick Waldrons framework for controlling microcontrollers
• Pre-built modules for different boards, buttons, gyros, IR, Led, motor, pin, relay, sensor, servo, sonar and steppers

• Many languages supported through tethering
  
• Firmware usually written C
• Chris WIlliams created Node-serial
• Many NPM modules written for interfacing with controllers
• Johnny-five written by Rick Waldron
• Cylon.js also popular
• Arduinos will use Standard Firmata firmware
• Spark Cores will use Voodoo firmware
• Tessels support Node natively through Lua

• Most microcontrollers run inside of a run loop
• Requires break and interrupt logic
• Difficult to do more than one thing at a time
• Javascript is more accessible than  C or C++
• Javascript is asynchronous, and can do multiple things at the same time inside of a single thread
• Javascript is the best language for programming robots
• NPM libraries make programming different kinds of hardware easy

• V = I R
• Voltage = Current x Resistance
• Albert Einstein said that the fact that this equation is so simple, it was proof that there was a God
• 5 Volts considered standard voltage for most electronics
• There is a push to make 3.3 Volts the standard
• Check the tolerance of your microcontroller, some will go as high as 12 or 15 Volts
• If you burn something out, these things are cheap
• Test your circuits on a breadboard, then solder 
• Check max amps, and find correct resister
• Please unplug from a power source while wiring

• David Fekke
• email me at David Fekke at gmail dot com
• On Skype as my first name and last name as one word
• Twitter @davidfekke and @jaxnode
• Thanks for coming out tonight
• Once again, please don't electrocute yourself and sue me