Presented at DevCon Chile, September 4, 2015

1. Building Blocks for
IoT Devices
Anil Gorthy
Software Engineer
linkedin.com/in/anilgorthy
@ganilb
© Anil Gorthy

2. Components of IoT Devices
Controller,
Sensor and
Actuators
Physical
Object
Internet
© Anil Gorthy

3. A device that has
sensors, actuators and
uses wireless protocols
to communicate
Created to solve a
specific need for the
consumer
IoT Devices
© Anil Gorthy

4. Source: IoT - The Networked Physical World http://dspace.mit.edu/handle/1721.1/86935
© Anil Gorthy

5. Tear-down of Philips Hue
Source: MIT Technology Review, 2014 © Anil Gorthy

6. Deeper Dive
© Anil Gorthy

7. Building Blocks
- microcontrollers
- sensors
- motors
Physical
Computing
Device
Design Software
- industrial
- interaction
- visual
- build the device
- use the device
- Bulb
- Doorbell
- IP camera
- Thermostat
© Anil Gorthy

8. Typical Architecture
SoftwareDevice
Server
GPIO / I2C
Micro-
controller
Wi-Fi /
BLE
Shield
Sensor
© Anil Gorthy

9. Server
Messaging
RESTful API
Software
Arduino Uno WiFly Shield VoiceBox Shield
WiFi Talking
Stephen Hawking
Device
Typical Architecture
(Example)
© Anil Gorthy

10. - Start with a sketch
- Iterate on the
design
- Create foamcore or
cardboard mockups
- Later, 3D printed
models
Industrial
Design
Steps
- Tinkercad
- SolidWorks
- Rhino
- SketchUp
Tools
© Anil Gorthy

11. Microcontrollers
Rapid prototyping
Quickly identify
connectivity and
controls
Power efficient
Built-in radios
C++, JavaScript or use
littleBits which requires
very little programming
Physical
Computing
© Anil Gorthy

12. Arduino components
pins or connections
sensors - ways of getting info into
your device, finding out things
about the surroundings such as
pressure, temperature, humidity,
proximity
actuators - outputs for the device
which let your device do something
to the outside world such as
motors, lights
shields - circuit boards that provide
capabilities such as Wi-Fi, BLE, etc
IDE for programming - uses a
simplified version of C++
Physical
Computing
Connecting an Arduino
© Anil Gorthy

13. © Anil Gorthy
Let us connect a light bulb

14. Physical
Computing
Software
/*
Blink
Turns on an LED on for one second, then off for one second, repeatedly.
This example code is in the public domain.
*/
// Pin 13 has an LED connected on most Arduino boards.
// Pin 11 has the LED on Teensy 2.0
// Pin 6 has the LED on Teensy++ 2.0
// Pin 13 has the LED on Teensy 3.0
// 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
}
© Anil Gorthy

15. Arduino IDE Physical
Computing
Software
© Anil Gorthy

16. Architecture - II
Source: IoT - The Networked Physical World http://dspace.mit.edu/handle/1721.1/86935
Software
© Anil Gorthy

17. Inspiration
Source: Dragon, http://www.digitalhabits.it/dragon-wireless-led-modular-lamp/
Two outputs
Light : 21 white
3000k 110 LEDs
Microprocessor
8 Bit, 32 Mhz
One input
Device
© Anil Gorthy

18. Thank you
© Anil Gorthy