This presentation introduces to the world of hardware everyone can use to get stated with Internet of Things (IoT) such as Arduino, Raspberry Pi and ESP8266.

1. Introduction to
IoT Hardware
2015, Daniel Eichhorn
http://blog.squix.ch

2. Today’s Goals
You know...
● what IoT stands for
● that Raspberry Pi is sweet but not a cake;-)
● where to start to build your own smart things

3. Internet of Things = Smart Things?

4. „Internet of Things“ von SRI Consulting Business Intelligence/National Intelligence Council - Apendix F of Disruptive Technologies Global Trends 2025 page
1 Figure 15 (Background: The Internet of Things).

5. Cool future!
But what about today?

6. IoT Hardware - Components
● Microcontroller (MCU, CPU)
● Storage (flash, EEPROM, ...)
● Power supply (batteries, adapter, solar)
● I/O: interface to the world
○ General Purpose Input Output (GPIO)
○ Analog/ Digital converter (ADC)
● Connectivity (serial, ethernet, wifi…)

7. IoT - Periphery
Sensors
Actors
Complex
Acoustic/ Visual

8. Arduino Platform
● Born in 2005
● Combines SW/HW
● Great for prototyping
● Popular for artists
● Italian origin

9. Popularity - Italian exports compared
Source: Google Trends

10. Arduino Hardware
● Atmel AVR MCU
● Open-Source
HW/SW
● Digital I/O, ADC
● Std. Form factor:
extensions (shields)
● Easy programming

11. Arduino Hardware - Flavours

12. Arduino - Common denominator
● Family of MCUs
● Programmable
● ~$2
● DIL, SMD

13. Arduino - Shields
● Wifi
● Displays
● Prototyping
● Motor drivers
● Build your own...

14. Arduino Programming
● C/C++
● Many libraries for I/O
● 1 Click compile/upload
● Java based IDE

15. Arduino.cc - Starting point

16. Summary Arduino
Con:
● Wireless
Connectivity
● Limited processing
power
Pro:
● Relatively Cheap
● Easy to programm
● Good I/O Interface
● Standard formfactor
● Good for prototyping
● Many extensions available (shields)

17. Raspberry Pi
● Single Board PC
● ARM based
● Var. Linux Distribs
● HDMI, Composite,
USB, GPIO, Audio
● ~$35
● System on SD Card

18. Popularity - British exports compared
Source: Google Trends

19. Raspberry Pi - Applications
Multimedia PC - Kodi Retro Game Console - Aracade Pi Schools - Scratch
Processing Cluster
(Lego frame)
ADS-B Flight Tracker - PiAware “Wearable” Computing”

20. Raspberry Pi - Programming
● Python
● Java 7/8
● C/C++
● Libs for HW
● “In situ”
programming

21. RPi - I/O Interface
● Many GPIOs
● No ADC
● No onboard
Wifi

22. Raspberry Pi - Summary
Pros:
● Almost normal PC
● Processing Power
● Price & Size (for a PC)
● Programming
● # of GPIO pins
● Complete OS
● Huge SW repo
Cons:
● Energy consumption
● Price (for IoT)
● No ADC

23. ESP8266 - NKOTB

24. ESP8266 - System on a Chip (SoC)
● ~$3
● 10 GPIO, 1 ADC
● Wifi (WEP, WPA(2))
● programmable
(C/C++, Lua)
● 3.3V
● UART

25. ESP8266 - Popularity
Source: Google Trends
July 2014

26. ESP8266 - Compared
Source: Google Trends

27. ESP8266 - Variations
● > 12 HW
versions
● Not all pins
accessible on
all boards

28. ESP8266 - Firmwares - C++ SDK
● SDK available from Espressif
● Dockerfile tool chain:
https://github.com/squix78/esp8266-docker-buildbox
● Alternative: RTOS SDK

29. ESP8266 - Firmwares - NodeMCU
● Lua API
● ESPlorer IDE
● Serial-To-USB
Transfer
● Open-Sourced

30. ESP8266 - Firmwares - NodeLua
● Lua
● WebIDE
● Log output to
browser
● FW open-sourced
● WebIDE closed
source

31. ESP8266 - Summary
Pros:
● Low price
● Connectivity
● Small
Cons:
● Periphery support
(Sensors, displays,..)
● Power supply

32. Comparison
ESP8266 Arduino Raspberry Pi
Cost ~$3 $3-$30 ~$35
Wifi Built-in Shield ($60) or
ESP8266
USB Dongle
Programming C++/Lua C++ Python/Java/C++
Code distribution Serial/ OTA USB/ SPI/ Serial In-Situ
Storage Built-In Built-In SD-Card
I/O 10 GPIO/ 1 ADC Arduino Uno:
13 GPIO/ 6 ADC
17 GPIO

33. How to get started? Starter Kits
Many options available.
Just pick one;-)

34. Where to buy?
http://www.seeedstudio.com/ http://www.aliexpress.com/ http://www.banggood.com/

35. Q&A

36. Breadboards
● For Easy
prototyping
● various sizesConnected but not crossing the
the gap
sometimes power rail on top
and bottom