Using iBeacons in iOS with Swift

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Using iBeacons in iOS with Swift M AT T N E D R I C H

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ABOUT ME AT O M I C O B J E C T M AT T N E D R I C H @ M AT T N E D R I C H M AT T. N E D R I C H @ AT O M I C O B J E C T. C O M

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What is an iBeacon?

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Bluetooth Low Energy (BTLE) device Broadcasts a ﬁxed one-way message at a regular time interval Devices can listen for messages and react appropriately WHAT IS AN IBEACON?

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One-way is important! No “connection” is made Repeated BTLE advertising packet WHAT IS AN IBEACON?

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WHAT IS AN IBEACON? B

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WHAT IS AN IBEACON? B !

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What can you do with them?

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GPS works well outside, but doesn’t work well indoors iBeacons can pick up this slack Applications Context aware content delivery (advertising) Passive Tracking INDOOR LOCATION SENSING

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Museum Place an iBeacon at each exhibit Store (e.g., Walmart) Detect when a customer is in a certain aisle, and deliver an advertisement to them CONTEXT AWARE CONTENT DELIVERY

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Detect when users walk past houses for sale, or apartments for rent Detect when users walk past your business CONTEXT AWARE CONTENT DELIVERY

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Stores can place beacons throughout and monitor customers as they move Traffic analysis, detect common routes Help detect over and underutilized areas PASSIVE TRACKING

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http://blog.mowowstudios.com/2015/02/100-use-cases- examples-ibeacon-technology/ MANY MORE APPLICATIONS

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CONFIDENTIAL IDENTIFIED BY THREE NUMBERS U U I D M A J O R N U M B E R 2 1 M I N O R N U M B E R 3

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UUID, MAJOR, MINOR Broadcast in every packet Conﬁgurable Allow for nice addressing schemes

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Who makes iBeacons?

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Apple Makes iBeacons? T R U E O R FA L S E

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False

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Apple deﬁned protocol Many beacon manufacturers Usually offer a companion app to connect to and conﬁgure their iBeacons BEACON MANUFACTURERS

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Each manufacturers beacons vary Battery life Battery replaceability Range Conﬁgurability Other protocols in addition to iBeacon BEACON MANUFACTURERS

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Some manufacturers offer an SDK Can simplify high level operations However, you do not need to use this BEACON MANUFACTURERS

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BEACON MANUFACTURERS E S T I M O T E R A D I U S N E T W O R K S B L U E S E N S E B L U E C AT S

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BEACON MANUFACTURERS E S T I M O T E R A D I U S N E T W O R K S

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Apps allow for conﬁguration UUID Major Number Minor Number BEACON CONFIGURATION

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Advertising Interval and broadcast strength are also conﬁgurable (usually) BEACON CONFIGURATION

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iOS Programming Model

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CoreLocation framework Hides the BTLE nature of beacons Some abstraction overlaps other location mechanisms (e.g., geo fencing) IOS PROGRAMMING MODEL

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Step 0 - Permission

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NSLocationWhenInUseUsageDescription Monitor or range when the user has the app open NSLocationAlwaysUsageDescription Monitoring when the app is in the background PERMISSION - INFO.PLIST

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CLLocationManager requestWhenInUserAuthorization() requestAlwaysAuthorization() Must call one before you start monitoring or ranging PERMISSION - CODE

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CONFIDENTIAL TWO USAGE MODELS M O N I T O R I N G R A N G I N G 2 1

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Monitoring

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Passive Receive ENTER and EXIT events Works in the background Can only monitor 20 iBeacons at a time MONITORING

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MONITORING B ! E N T E R ! E X I T

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CLRegion

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Ranging

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Active Continuous callbacks with beacon info (e.g., proximity) No beacon limit Foreground only (kind of) RANGING

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RANGING B ! R A N G E ( FA R ) R A N G E ( N E A R ) R A N G E ( I M M E D I AT E )

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CLBeacon

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CLPROXIMITY

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CLPROXIMITY

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CLLOCATIONACCURACY

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RSSI

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Is the Distance Accurate?

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HTTP://STACKOVERFLOW.COM/QUESTIONS/20416218/UNDERSTANDING-IBEACON-DISTANCING

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HTTPS://SHINESOLUTIONS.COM/2014/02/17/THE-BEACON-EXPERIMENTS-LOW-ENERGY-BLUETOOTH-DEVICES-IN-ACTION/

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HTTPS://SHINESOLUTIONS.COM/2014/02/17/THE-BEACON-EXPERIMENTS-LOW-ENERGY-BLUETOOTH-DEVICES-IN-ACTION/ DISTANCE EXPERIMENT BLOG POST Looked at two beacon manufacturers Estimate Kontakt Found that accuracy varies between manufacturers and also beacons within a given manufacturer, but distance measures can be decent under certain situations

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How can I get some iBeacons?

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HOW MUCH DO THEY COST? E S T I M O T E R A D I U S N E T W O R K S B L U E C AT S 3 F O R $ 5 9 $ 1 4 3 F O R $ 8 7

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Other Tips

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Monitoring is allowed Ranging is not However, you can use monitoring to wake your app up, and then range periodically BACKGROUND

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BEACON IDENTIFICATION If you can’t turn off your beacons, it is good to have some way of disabling them Faraday cage - exist on Amazon

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MONITORING MORE THAN 20 BEACONS HTTPS://SPIN.ATOMICOBJECT.COM/2016/04/18/MONITORING-OVER-20-IBEACON-REGIONS/