Rapid IoT Prototyping with Tizen on Raspberry PiLeon Anavileon.anavi@konsulko.comleon@anavi.org

Agenda

Tizen

Raspberry Pi

Sensors and peripherals

Building Tizen for Raspberry Pi

Communication between IoT

Open source hardware HAT

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.

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

Tizen Architecture

Web applications

Web framework Native framework

Core components

Linux kernel and device drivers

Native applications

Raspberry Pi

Low cost single board computer

Broadcom ARM SoC

Huge community

Most popular programming languages: Python, C, C++, etc.

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

Raspberry Pi Flavors

Major changes since B+

Raspberry Pi B (2011) Raspberry Pi B+ (2014)

26 pins40 pins

Major changes since B+

GPIO

I2C

UART

SPI

Other interfaces

Official Peripherals

Raspberry Pi official 7” touch screen display

Raspberry Pi 5MP/8MP camera

Sense HAT

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

MasterRaspberry Pi

(pins: 3, 5) Slave 1 Slave 2 Slave N...

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

1-Wire

Single-wire communication protocol

Half-duplex bidirectional communication (master-slave)

Slower data transfer but longer range than I2C

DS18B20 temperature sensor

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

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

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 TDC 2017

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

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

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/

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

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

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

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

Communication between IoT

HTTP/HTTPS

MQTT

CoAP

IoTivity

Other

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

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/

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

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

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

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

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

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

Thank you!