Watch your Bluetooth! - Singapore iOS Dev Scout May 2018 Meetup

This talk is definitely not about hacking Bluetooth. Core Bluetooth has arrived to Apple Watch. Just watch what your Watch can do!

https://engineers.sg/video/watch-your-bluetooth-ios-dev-scout--2640

Transcript

1. Watch Your Bluetooth! Maciej Piotrowski Singapore iOS Dev Scout Meetup
4. WWDC 2017 watchOS 4 + CoreBluetooth = ❤
5. let's get back to the 10th century
7. Bluetooth Low Energy (BLE) • low energy consump0on • client - server architecture • services and characteris0cs
8. Core Bluetooth
14. Core Bluetooth class CBCentral {} class CBPeripheral {} class CBCentralManager {} class CBPeripheralManager {} class CBService {} class CBCharacteristic {} class CBUUID {}
15. Bird Central & Bird Service • CBService - Bird • CBCharacteristic - name • CBCharacteristic - color • CBCharacteristic - alpha
16. Bird Values • CBService - Bird • UTF-8 String • #hex as UTF-8 String • Int as UTF-8 String
17. Bird Service UUIDs enum BirdService { static let uuid = CBUUID(string: "B7AC06DC-09FF-40ED-B03A-55D09B08EB4A") static let colorUUID = CBUUID(string: ! " #) static let nameUUID = CBUUID(string: ! " #) static let alphaUUID = CBUUID(string: ! " #) static let characteristics: [CBUUID] = [ colorUUID, nameUUID, alphaUUID ] }
18. Bird Peripheral • ADVERTISE Bird Service • respond to READ requests • NOTIFY subscribers - value updates
19. Bird Central • SCAN for BirdService • DISCOVER its characteris7cs • READ their values • SUBSCRIBE for updates of values
20. let's write some code! TDD = red ⛔ , green , refactor
21. note to self / /TODO: Implement in Xcode... !
22. Recap • watchOS 4 + CoreBluetooth (CBCentralManager) = • ✅ unit tests - helped with design • BirdCentral - portable code • iOS # • watchOS ⌚ • macOS % • tvOS &
23. Thanks!
25. Quiz
26. How can you create a UUID on macOS (tool) and iOS (class framework) ?
27. Links • Watch your Bluetooth - demo source code on Github • Core Bluetooth - documenta8on changes • WWDC 2017 - 712 - What's New in Core Bluetooth • WWDC 2017 - 205 - What's New in watchOS • Apple - Bluetooth for Developers • swiIing.io - #Core Bluetooth • Bluetooth - official website
28. Core Bluetooth on watchOS • central mode only • peripherals disconnected on app suspension • connect 2 peripherals simultaneously