Wearables at ScaleDeploying OSGi on an army of Cubie Trucks

Frank Lyaruu

About me

Frank Lyaruu

CTO at

Senior Technology Architect at

@lyaruu

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About Dexels

• Est. 2001 based in Amsterdam

• Enterprise software for large companies

• Heavily invested in OSGi

• Focused on sports and entertainment11/17/14

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About Dexels

• Est. 2013

• Joint venture with Dexels

• Custom hardware for large events

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• Case study

• Hardware stack

• Software stack

• Development chain

• DEMO!

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Tomorrowland

Tomorrowland

Tomorrowland 2014

Electronic music festival near Antwerp, Belgium

• 2 weekends

• 8 stages

• ~100 hectares

• ~100k visitors a weekend

• ~ € 250 per ticket

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Requirements

Requirements

Design a wristband to do:

• Access control

• Location

• Profiling / feedback

• Crowd monitoring

• Integrate with 3rd party applications

• Something that adds to the UX

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Access control

• Should always work

• Should be secure

…simplicity is essential: Passive RFID

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Location

• Ability to locate individuals

• Ability to locate security personnel

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Profiling / feedback

• How do the visitors behave?

• What acts are popular?

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Crowd monitoring

• Find hotspots in the flow of people

• Dashboard for security personnel

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UX

• UX is key

• Comfortable

• Match the festival

• Suitable for non-nerds

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The plan

The setup

• Set up base stations around the terrain

• Wristbands will report status

• The base stations triangulate and consolidate the data

• Visualize and push the data to other applications

• Use regular passive RFID for access control11/17/14

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Something cool

• LED lights on the wristbands, integrated with the light show

• A button to send Facebook friend requests

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The protocol

• Time slotted protocol

• All base stations synchronise with each other

• Visitor bracelets send every few minutes

• Staff bracelets send every few seconds

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Hardware

Hardware

• One 3V battery for 3 days

• Leather

• Branded for the festival

• < $10 per bracelet

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Base station hardware

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Base station

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Hardware challenges

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Base stations

• Heat

• Rain

• Unreliable power

• Unreliable network

• Unstable mount points

• Electromagnetic interference

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Base station deployment

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Base stations

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Local “datacentre”Local “datacentre”

Hazelcast clusterHazelcast cluster

Sendrato Infrastructure

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CubieTruckCubieTruck CubieTruckCubieTruckCubieTruckCubieTruck

CloudCloud

Salt MasterSalt Master

Log serverLog server

MongoDbMongoDb MongoDbMongoDb

Super coordinatorSuper coordinator

Management UIManagement UI

3rd party3rd party

Base station software stack

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Fedora 20Fedora 20

JavaJava

Apache FelixApache Felix

Salt

age

ntSa

lt a

gent

Sendrato ApplicationSendrato Application

Base stationBase station

Basestation software

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Radio DriverRadio Driver OSGi eventOSGi event

Log locally?Log locally?

Publish in clusterPublish in clusterFilter eventFilter event

Radio Radio

WristbandsWristbands

Logging

• Custom Logback appender to Redis queue

• ElasticSearch analytics

• Kibana web interface

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Salt Stack

• Configuration manager

• Remote execution

• Agent based

• Versatile & Fast

• Master running in the cloud

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“Testing in production”

Development cycle

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EclipseEclipse Maven buildMaven build GitGit SaltSalt FileInstallFileInstall

• Pretty crude but effective:

Future work

• Distributed OSGi

• More mature deployment model

• Apache Karaf + Cellar

• Pluggable network / clustering

• Proper 3rd party API

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Demo

• http://youtu.be/eDZaea7OCd0 39

Thank you!@Sendrato

sendrato.com

info@sendrato.com

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