This document discusses rapid IoT prototyping using Tizen on Raspberry Pi. It provides an overview of Tizen and Raspberry Pi, describes how to build Tizen for Raspberry Pi using Yocto Project tools, and discusses connecting sensors and communicating between IoT devices. It also presents examples of open source hardware add-on boards that can be designed for Raspberry Pi to create IoT prototypes.

1. Rapid IoT Prototyping with
Tizen on Raspberry Pi
Leon Anavi
leon.anavi@konsulko.com
leon@anavi.org

2. Agenda
 Tizen
 Raspberry Pi
 Sensors and peripherals
 Building Tizen for Raspberry Pi
 Communication between IoT
 Open source hardware HAT

3. Tizen
 Open source Linux-based software platform
 Project of the Linux foundation
 Compatible with ARM, MIPS and Intel architectures
 Excellent HTML5 and web apps support
 Suitable of all device areas: mobile, wearable, embedded, TV, IVI, IoT, etc.

4. Tizen Milestones
 2011 - Start of the project
 2012 - Initial release
 2013 - First Tizen devices (Samsung NX200 & NX300 cameras)
 2014 - First Tizen smartwatches (Samsung Gear 2 & Gear 2 Neo)
 2015 - Samsung Z1 - the first Tizen smarthone
 2015 - Tizen ported to Raspberry Pi

5. Tizen Architecture
Web applications
Web framework Native framework
Core components
Linux kernel and device drivers
Native applications

6. Raspberry Pi
 Low cost single board computer
 Broadcom ARM SoC
 Huge community
 Most popular programming languages:
Python, C, C++, etc.

7. Raspberry Pi Milestones
 2009 - Raspberry Pi Foundation
 2012 - The 1st Raspberry Pi
 2014 - Raspberry Pi B+
 2015 - Tizen ported to Raspberry Pi
 2016 - Raspberry Pi Zero
 2017 – Raspberry Pi Zero W

8. Raspberry Pi Flavors

9. Major changes since B+
Raspberry Pi B (2011) Raspberry Pi B+ (2014)
26 pins
40 pins

10. Major changes since B+
 GPIO
 I2C
 UART
 SPI
 Other interfaces

11. Official Peripherals
 Raspberry Pi official 7” touch screen display
 Raspberry Pi 5MP/8MP camera
 Sense HAT

12. I2C
 Inter-integrated Circuit (I2C) Protocol
 Full-duplex bidirectional two-wire serial bus for communication of
multiple slave devices with one or more master devices
 Raspberry Pi B+ and newer models have two I2C buses
SCL
SDA
Master
Raspberry Pi
(pins: 3, 5) Slave 1 Slave 2 Slave N...

13. Popular I2C Sensors
 HTU21D – temperature and humidity
 BME280 - temperature, barometric pressure and humidity
 BMP280/BMP180/BMP085 – temperature and barometric pressure
 HMC5883L - compass
 TSL2561 – light
 BH1750 - light

14. 1-Wire
 Single-wire communication protocol
 Half-duplex bidirectional communication (master-slave)
 Slower data transfer but longer range than I2C
 DS18B20 temperature sensor

15. SPI
 Serial Peripheral Interface (SPI) bus
 Synchronous serial communication in master-slave architecture
 Popular SPI peripheral devices such as sensors, displays, NFC/RFID
readers/writers

16. Analog sensors
 Raspberry Pi does NOT have a built-in A/D converter
 Popular external A/D converters:
● Microchip MCP3002 dual channel A/D converter
● Microchip MCP3008 8 channel A/D converter

17. Tizen for Raspberry Pi
 Samsung Open Source Group (OSG) initially ported Tizen 3.0 to Raspberry Pi
2 Model B using the Yocto Project and OpenEmbedded (OE)
 Tizen on Yocto/OE aims at building Tizen images using the tools provided by
the Yocto Project
 Tizen on Yocto/OE provides Tizen distribution layer meta-tizen
 Tizen for Raspberry Pi uses BSP layer meta-raspberrypi
 Craftroom with Tizen 4.0 and Raspberry Pi support
announced at TDC2017

18. What is in Tizen 3.0 for Raspberry Pi?
Linux kernel
Smack
RPM Package Manager
systemd
GCC
Crosswalk
Cynara
SQLite
PulseAudio
Wayland & Weston
GNU C Library
EFL

19. The Yocto Project
 Open source collaborative project for creating custom Linux-based systems for
embedded devices
 Based on the OpenEmbedded build framework
 Project of the Linux Foundation
 Used for building Poky, Automotive Grade Linux (AGL), GENIVI Development
Platform (GDP), Tizen, Reference Design Kit (RDK), Ångström, Arago, Ostro,
AsteroidOS, etc.
 Getting started:
https://www.yoctoproject.org/
https://www.yoctoproject.org/documentation

20. Raspberry Pi Yocto/OE BSP
 Yocto/OE BSP layer for Raspberry Pi: meta-raspberrypi
 Upstream of meta-raspberrypi:
http://git.yoctoproject.org/cgit.cgi/meta-raspberrypi/
 Fork of meta-raspberrypi from Samsung Open Source Group (OSG) with
enabled 3D hardware acceleration for Wayland/Weston:
http://git.s-osg.org/meta-raspberrypi.git/

21. Building Tizen for Raspberry Pi
 Download tizen-distro
 Download meta layers with additional board support packages (BSP)
 Configure conf/local.conf and conf/bblayers.conf
 Launch a build of a Tizen image... get a cup of tea while waiting...
 Grab the generated image from tmp-glibc/deploy/images/${MACHINE}
 Details:
https://wiki.tizen.org/Raspberry_Pi#Build_using_Tizen_Yocto

22. Adding Packages
 Append packages, for example vim, to image by adding the following
command to conf/local.conf or the image's recipe:
IMAGE_INSTALL_append = " vim "
 Customize the Tizen image by adding or removing packages

23. Bitbake Cheat Sheet
 Check value of a variable in a recipe
bitbake tizen-common-core-image-crosswalk -e | grep ^ROOTFS_PKGMANAGE
 Check recipe version
bitbake -s | grep crosswalk
 Build a package or an image
bitbake foo
 Clean up
bitbake -c clean foo
 Recompile if the source has been changed
bitbake -f -c compile foo
 Output dependency tree in graphviz format
bitbake -g tizen-common-core-image-crosswalk

24. Contributing to Tizen on Yocto
 Tizen-distro uses combo-layer script git://git.tizen.org/scm/bb/tizen-distro
 Tizen-distro layers:
openembedded-core, meta-openembedded, meta-qt5, meta-tizen
 Meta-tizen git://git.tizen.org/scm/bb/meta-tizen
 Step by step instructions for contributing through Git and Gerrit
https://wiki.tizen.org/How_to_contribute_to_Tizen_on_Yocto_Project

25. Communication between IoT
 HTTP/HTTPS
 MQTT
 CoAP
 IoTivity
 Other

26. Putting the Pieces Together
 Customize Tizen image for Raspberry Pi using Yocto/OE
 Pick up the right peripherals
 Design custom add-on board for Raspberry Pi
 Consider using the free and open source software tool KiCAD for designing open
source hardware add-on boards
 Create prototypes using the services of OSHPark, Chinese companies or your
local PCB manufacturer

27. Open Source Hardware
 Design specifications of a PCB or another physical object which are licensed in
such a way that said object can be studied, modified, created, and distributed by
anyone
 Popular open source hardware devices:
Arduino, OLinuXino, Beaglebone, MinnowBoard
 Open Source Hardware Association (OSHW)
https://www.oshwa.org/

28. Making Raspberry Pi HAT
 Form factor and dimensions (65x56mm)
 40 pin header compatible with Raspberry Pi B+ and the newer models
 EEPROM with device tree fragment
 Details:
https://www.raspberrypi.org/blog/introducing-raspberry-pi-hats/
https://github.com/raspberrypi/hats

29. Making Raspberry Pi pHAT
 Form factor suitable for Raspberry Pi Zero with 4 mount holes
 Dimensions 65x30mm
 40 pin through-hole header
 EEPROM not mandatory
*Not an official standard of the Raspberry Pi Foundation

30. Showcase 1: Bringing Life in Retro Devices
 ANAVI Infrared pHAT (open source hardware)
 Linux Infrared Remote Control (LIRC)
 Replacing IR remote controls of old TV, HiFi, air conditioners and making them IoT

31. Showcase 2: Raspberry Pi Gardening
 ANAVI Gardening pHAT with MCP3002 A/D Converter
 Analog soil moisture sensors
 1-wire DS18B20 waterproof sensor
 I2C sensors for light, temperature and humidity

32. Join the Tizen Community!
 Mailing lists: https://www.tizen.org/community/mailing-lists
 IRC: #tizen channel on freenode
 Forums: https://developer.tizen.org/forums
 Wiki: https://wiki.tizen.org/Main_Page

33. Useful resources:
 https://www.raspberrypi.org/
 https://www.tizen.org/
 https://wiki.tizen.org/Raspberry_Pi
 https://blogs.s-osg.org/tizen-on-rpi2/
 https://wiki.tizen.org/Tizen_on_Yocto_Project
 https://wiki.tizen.org/wiki/Build_Tizen_with_Yocto_Project
 https://wiki.tizen.org/How_to_contribute_to_Tizen_on_Yocto_Project

34. Thank you!