從App developer角度來介紹BLE

Aug 23, 2014Download as PPTX, PDF9 likes3,424 views

This document discusses Bluetooth Low Energy (BLE) and its growing importance for wearable devices and the Internet of Things. It provides an overview of BLE specifications and roles, how devices communicate using advertising and connections, and how to implement BLE on Android. Examples of real-world BLE applications are given, including smart locks, beacons, smart plugs, and baby monitors. Code examples are also provided for scanning, connecting to, and reading data from BLE devices using Android APIs.

在穿戴式裝置與物聯網正夯的時代
身為App Developer你不能不了解的BLE
Sam Lee (misgod.tw@gmail.com)

lBLE (Bluetooth Low Energy)
lBluetooth Smart
lBluetooth 4.0 (June 2010)
lBluetooth 4.1 (Dec 2013)
l低成本 (?)
l範圍: ~ 100m
l省電: 鈕扣電池可以撐1年以上
l速度: 理論上限(1Mbit/s), App (270Kbit/s)

Overview
lBroadcast & connection
lShort packets
lClient/Server 架構
lEverything has STATE
l非同步傳送資料

Device Classic Bluetooth BLE support
Pre-4.0 Bluetooth Yes No
4.x Single-Mode No Yes
4.x Dual-Mode Yes Yes

l2.4G Hz
l40 channels
l3 advertising channel
lFixed rate: 1 Mbit/s
l高斯頻移鍵控(GFSK)
lFrequency Hopping (AFH)

lBluetooth Device Address
l48-bit (Public/Random)
l4 roles
lAdvertiser & Scanner
lMaster & Slave
l1 format 2 types packets
lAdvertising & Data
lConnection (7.5ms~4s)
l 27bytes, but ~20 bytes
lAdvertising (20ms ~ 10.24s)
l31 bytes data payload
lActive/Passive scanning

l協定多工器
l封包重組與分配
lData payload: 23 bytes
lSimilar to TCP

lInitiator → Responder
lCentral → Peripheral (GAP)
lSecurity Procedures
lPairing
lBonding
lEncryption Re-establishment
lPairing Algorithms
lJust Works
lPasskey Display
lOut Of Band

lClient->Server
lRequest → Response
lStrict Sequencing
lServer Initiated
lIndication/Confirmation
lNotfiication
l Handle lType
l(UUID)
lAttribute Value l
Permissio
ns
l2B 2/4/16B l0~512B

lControl layer
lRoles
lBroascaster & Observer
lCentral & Peripheral
lGAP Service(GATT)
lDevice name
lApprearance
lPPCP

lData Layer
lRoles
lClient & Server
lBluetoothBaseUUID
lxxxxxxxx-0000-1000-8000-
00805F9B34FB
lShortened UUID(16 or 32 bit)

lFirst Release
lJellyBean MR 4.3 (API 18)
lPeripheral Mode
lAndroid L (Coming Soon)

http://developer.android.com/guide/topics/connectivity/bluetooth-

搭配: TI SensorTag CC2541
l 兩顆按鈕
l 陀螺儀
l 加速計
l 溫濕感測
l 氣壓計
l 磁力計
l IR溫度感測器

Coding Steps
1. Use BLE Permissions
2. Setup BLE
3. Scan LE device
4. Connect to GATT Server
5. Discovery Services
6. Read Data
l Read Characteristic(Attrubutes)
l Receiving notification

http://shopping.pchome.com.tw/prod/CBAFJ0-

August Smart Lock
http://www.august.com/

Zuli
https://www.kickstarter.com/projects/zuli/zuli-smartplugs

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從App developer角度來介紹BLE

3. 在穿戴式裝置與物聯網正夯的時代身為App Developer你不能不了解的BLE Sam Lee (misgod.tw@gmail.com)

5. lInternet

6. lBLE (Bluetooth Low Energy) lBluetooth Smart lBluetooth 4.0 (June 2010) lBluetooth 4.1 (Dec 2013) l低成本 (?) l範圍: ~ 100m l省電: 鈕扣電池可以撐1年以上 l速度: 理論上限(1Mbit/s), App (270Kbit/s)

7. Overview lBroadcast & connection lShort packets lClient/Server 架構 lEverything has STATE l非同步傳送資料

8. Device Classic Bluetooth BLE support Pre-4.0 Bluetooth Yes No 4.x Single-Mode No Yes 4.x Dual-Mode Yes Yes

9. 广播

10. 连线

11. 如何省电

13. Protocol ?? Profile ?? lGATT Based Profiles

14. l2.4G Hz l40 channels l3 advertising channel lFixed rate: 1 Mbit/s l高斯頻移鍵控(GFSK) lFrequency Hopping (AFH)

16. lBluetooth Device Address l48-bit (Public/Random) l4 roles lAdvertiser & Scanner lMaster & Slave l1 format 2 types packets lAdvertising & Data lConnection (7.5ms~4s) l 27bytes, but ~20 bytes lAdvertising (20ms ~ 10.24s) l31 bytes data payload lActive/Passive scanning

17. 濒搭起友谊的桥樑

18. l協定多工器 l封包重組與分配 lData payload: 23 bytes lSimilar to TCP

19. lInitiator → Responder lCentral → Peripheral (GAP) lSecurity Procedures lPairing lBonding lEncryption Re-establishment lPairing Algorithms lJust Works lPasskey Display lOut Of Band

20. lClient->Server lRequest → Response lStrict Sequencing lServer Initiated lIndication/Confirmation lNotfiication l Handle lType l(UUID) lAttribute Value l Permissio ns l2B 2/4/16B l0~512B

21. lControl layer lRoles lBroascaster & Observer lCentral & Peripheral lGAP Service(GATT) lDevice name lApprearance lPPCP

22. lData Layer lRoles lClient & Server lBluetoothBaseUUID lxxxxxxxx-0000-1000-8000- 00805F9B34FB lShortened UUID(16 or 32 bit)

25. lFirst Release lJellyBean MR 4.3 (API 18) lPeripheral Mode lAndroid L (Coming Soon)

26. http://developer.android.com/guide/topics/connectivity/bluetooth-

27. 搭配: TI SensorTag CC2541 l 兩顆按鈕 l 陀螺儀 l 加速計 l 溫濕感測 l 氣壓計 l 磁力計 l IR溫度感測器

28. Coding Steps 1. Use BLE Permissions 2. Setup BLE 3. Scan LE device 4. Connect to GATT Server 5. Discovery Services 6. Read Data l Read Characteristic(Attrubutes) l Receiving notification

29. 简易型简报器

30. 实际的应用案例

31. http://shopping.pchome.com.tw/prod/CBAFJ0-

32. http://24h.pchome.com.tw/prod/DGBT4W-

33. Oral-B

34. August Smart Lock http://www.august.com/

35. iBeacon

36. Zuli https://www.kickstarter.com/projects/zuli/zuli-smartplugs

37. https://www.youtube.com/watch?v=g8h_i8qv1FY

38. Mimo Kimono http://mimobaby.com/