Shuichi Tsutsumi: Practical Core Bluetooth in IoT & Wearable projects

In recent years, "IoT" or "Wearable" are one of buzzwords, so you might have interests in building hardware products. But learning how to develop electric circuits, mechanical systems or embedded systems etc. from zero is so difficult.

However, iOS developers can contribute to projects of hardware products with the knowledge of Core Bluetooth / Bluetooth Low Energy (BLE), even if they are not familiar with hardware layer.

In this session, you can learn the basics of Core Bluetooth / BLE (what it is, why we use it, and how it works), and practical knowledges to build apps for hardware products (how to design the apps, how to test without actual hardware prototypes, troubleshooting tips, and how the apps can be reviewed by Apple) which I learned through actual IoT/Wearable projects.

This would be interesting & understandable even if you are not familiar with or have no interests in Core Bluetooth because of the actual examples.

Bio: Shuichi is an iOS Freelancer who has developed many IoT related apps using Bluetooth Low Energy. He co-authored "iOS x BLE Core Bluetooth Programming" (2015) and authored "iOS Programming - Advanced 100 Recipes" (2013). He is the owner of popular OSS repositories such as iOS-9-Sampler, AnimatedTransitionGallery, and many more, ultimately totaling 15,000 stars.
Twitter: https://twitter.com/shu223

Transcript

1. Practical Core Bluetooth in IoT & Wearable projects Shuichi Tsutsumi @shu223 AltConf 2016 - San Francisco
5. iOS-10-Sampler IUUQTHJUIVCDPNTIV
7. Overview • Basics of Core Bluetooth • Practical Core Bluetooth Based on my experience!
8. Bluetooth Low Energy?
9. Bluetooth Low Energy (BLE)
10. Bluetooth Low Energy (BLE) • Wireless technology
11. Bluetooth Low Energy (BLE) • Wireless technology - no network infrastructure required
12. Bluetooth Low Energy (BLE) • Wireless technology - no network infrastructure required Wi-Fi
13. Bluetooth Low Energy (BLE) • Wireless technology - no network infrastructure required BLE
14. • Low energy
15. • Low energy • NOT compatible with Classic BT
16. • Low energy • NOT compatible with Classic BT • Uses 2.4 GHz radio frequencies
17. • Low energy • NOT compatible with Classic BT • Uses 2.4 GHz radio frequencies • Marketed by the Bluetooth SIG
18. • Low energy • NOT compatible with Classic BT • Uses 2.4 GHz radio frequencies • Marketed by the Bluetooth SIG • etc…
19. • Low energy • NOT compatible with Classic BT • Uses 2.4 GHz radio frequencies • Marketed by the Bluetooth SIG • etc…
20. The most important thing for iOS developers
21. The API ‘Core Bluetooth’ is open for developers
22. The API ‘Core Bluetooth’ is open for developers • API for Classic BT is NOT open. - Requires MFi certification.
23. BLE is almost the ONLY way to enable iOS apps to communicate with external hardware without infrastructure or MFi.
24. Basics of Core Bluetooth
26. Moff Band Moff App
27. Moff Band Moff App BLE Connection
28. Moff Band Moff App BLE Connection Sensors - Gyroscope - Accelerometer
29. Moff Band Moff App Sensor Data BLE Connection Sensors - Gyroscope - Accelerometer
30. Moff Band Moff App Sensor Data BLE Connection Sensors - Gyroscope - Accelerometer Analyze sensor data
31. Moff Band Moff App Sensor Data BLE Connection Sensors - Gyroscope - Accelerometer Analyze sensor data Recognize - Gesture - Posture
32. Moff Band Moff App Sensor Data BLE Connection Sensors - Gyroscope - Accelerometer Analyze sensor data Recognize - Gesture - Posture Play sounds
33. Sensor Data BLE Connection How is sensor data sent with Core Bluetooth?
34. Step 1. Scan
35. Step 1. Scan: Search for nearby BLE devices
36. Step 1. Scan: Search for nearby BLE devices
37. Step 1. Scan Advertise : Search for nearby BLE devices
38. Scan Step 1. Scan Advertise : Search for nearby BLE devices
39. Scan Step 1. Scan Advertise : Search for nearby BLE devices centralManager.scanForPeripheralsWithServices(nil, options: nil)
40. Scan Step 1. Scan Advertise Discover : Search for nearby BLE devices
41. Scan Step 1. Scan Advertise Discover : Search for nearby BLE devices func centralManager(central: CBCentralManager, didDiscoverPeripheral peripheral: CBPeripheral, advertisementData: [String : AnyObject], RSSI: NSNumber!) { print(“Discovered a BLE device!”) }
42. Scan Step 1. Scan Advertise Discover : Search for nearby BLE devices func centralManager(central: CBCentralManager, didDiscoverPeripheral peripheral: CBPeripheral, advertisementData: [String : AnyObject], RSSI: NSNumber!) { print(“Discovered a BLE device!”) } Central
43. Scan Step 1. Scan Advertise Discover : Search for nearby BLE devices func centralManager(central: CBCentralManager, didDiscoverPeripheral peripheral: CBPeripheral, advertisementData: [String : AnyObject], RSSI: NSNumber!) { print(“Discovered a BLE device!”) } Peripheral Central
44. Step 2. Connect
45. Connect Step 2. Connect
46. Connect Step 2. Connect centralManager.connectPeripheral(peripheral, options: nil)
47. Connect Step 2. Connect centralManager.connectPeripheral(peripheral, options: nil) func centralManager(central: CBCentralManager, didConnectPeripheral peripheral: CBPeripheral) { print(“Connected!”) }
48. Step 3. Subscribe
49. Step 3. Subscribe: Ready to receive data
50. Step 3. Subscribe: Ready to receive data GATT = Generic Attribute Profile
51. Moff Service xx Service Step 3. Subscribe: Ready to receive data GATT = Generic Attribute Profile
52. Moff Service xx Service Button Characteristic xx Characteristic Sensor Characteristic Step 3. Subscribe: Ready to receive data GATT = Generic Attribute Profile
53. Moff Service xx Service Button Characteristic xx Characteristic Sensor Characteristic Subscribe (Request to be notified) Step 3. Subscribe: Ready to receive data GATT = Generic Attribute Profile
54. Moff Service xx Service Button Characteristic xx Characteristic Sensor Characteristic Subscribe (Request to be notified) Step 3. Subscribe: Ready to receive data GATT = Generic Attribute Profile peripheral.setNotifyValue(true, forCharacteristic: c)
55. Step 4. Notify Moff Service Sensor Characteristic xxxx Characteristic
56. Step 4. Notify Moff Service Sensor Characteristic xxxx Characteristic Update the value
57. Step 4. Notify Notify subscribers Moff Service Sensor Characteristic xxxx Characteristic Update the value
58. Step 4. Notify Notify subscribers Moff Service Sensor Characteristic xxxx Characteristic Update the value func peripheral(peripheral: CBPeripheral, didUpdateValueForCharacteristic characteristic: CBCharacteristic, error: NSError?) { print(“Received sensor data!”) }
59. Step 4. Notify Notify subscribers Moff Service Sensor Characteristic xxxx Characteristic Update the value func peripheral(peripheral: CBPeripheral, didUpdateValueForCharacteristic characteristic: CBCharacteristic, error: NSError?) { print(“Received sensor data!”) }
60. Hardware Side?
61. Hardware Side? I’m sorry, I don’t know…
62. BLE
63. BLE iOS Engineer
64. BLE iOS Engineer
65. BLE Firmware Engineer iOS Engineer
66. BLE Firmware Engineer iOS Engineer
67. Hardware Projects I’ve worked on as an iOS engineer
68. Wheelchair ‘WHILL’
69. Wheelchair ‘WHILL’
70. Wearable Walkie-Talkie ‘BONX’
71. Wearable Walkie-Talkie ‘BONX’
72. Wearable Walkie-Talkie ‘BONX’
74. Group conversation system with VoIP
75. Group conversation system with VoIP - Detects the human voice
76. Group conversation system with VoIP - Detects the human voice - Cuts out all background noise
77. Group conversation system with VoIP - Detects the human voice - Cuts out all background noise → Can be used even in areas with poor coverage!
78. BLE for BONX
79. BLE for BONX
80. BLE for BONX
81. BLE for BONX
82. IoT for Cars ‘SmartDrive’
83. Printable Open-Source Humanoid “PLEN2”
84. Music for the Deaf %BJUP
    .BOBCF.PUPJ
    *TIJCBTIJ5FSVPLB
    .BTBLJ4IVJDIJ
    5TVUTVNJ
    Y
    406-
    '".*-:
85. Music for the Deaf %BJUP
    .BOBCF.PUPJ
    *TIJCBTIJ5FSVPLB
    .BTBLJ4IVJDIJ
    5TVUTVNJ
    Y
    406-
    '".*-: iPhone
86. Music for the Deaf %BJUP
    .BOBCF.PUPJ
    *TIJCBTIJ5FSVPLB
    .BTBLJ4IVJDIJ
    5TVUTVNJ
    Y
    406-
    '".*-: Electronic Stimulation Device iPhone
87. Music for the Deaf %BJUP
    .BOBCF.PUPJ
    *TIJCBTIJ5FSVPLB
    .BTBLJ4IVJDIJ
    5TVUTVNJ
    Y
    406-
    '".*-: Commands Electronic Stimulation Device iPhone
88. Music for the Deaf %BJUP
    .BOBCF.PUPJ
    *TIJCBTIJ5FSVPLB
    .BTBLJ4IVJDIJ
    5TVUTVNJ
    Y
    406-
    '".*-:
89. Practical Core Bluetooth
90. Defining GATT
91. GATT to send sensor data Foo Service Sensor Data Characteristic UUID: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx Bar Service xx Characteristic UUID: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx Properties: Notify Value: acc x, acc y, acc z, gyro x, gyro y, gyro z (2bytes for each) xx Characteristic
92. GATT to send sensor data Foo Service Sensor Data Characteristic UUID: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx Bar Service xx Characteristic UUID: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx Properties: Notify Value: acc x, acc y, acc z, gyro x, gyro y, gyro z (2bytes for each) xx Characteristic
93. GATT to send sensor data Foo Service Sensor Data Characteristic UUID: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx Bar Service xx Characteristic UUID: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx Properties: Notify Value: acc x, acc y, acc z, gyro x, gyro y, gyro z (2bytes for each) xx Characteristic
94. GATT to send sensor data Foo Service Sensor Data Characteristic UUID: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx Bar Service xx Characteristic UUID: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx Properties: Notify Value: acc x, acc y, acc z, gyro x, gyro y, gyro z (2bytes for each) xx Characteristic
95. GATT to send sensor data Foo Service Sensor Data Characteristic UUID: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx Bar Service xx Characteristic UUID: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx Properties: Notify Value: acc x, acc y, acc z, gyro x, gyro y, gyro z (2bytes for each) xx Characteristic
96. GATT to send sensor data Foo Service Sensor Data Characteristic UUID: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx Bar Service xx Characteristic UUID: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx Properties: Notify Value: acc x, acc y, acc z, gyro x, gyro y, gyro z (2bytes for each) xx Characteristic
97. GATT to send button interactions Foo Service Button Control Characteristic UUID: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx UUID: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx Properties: Notify Value: 0x01 or 0x00
98. GATT to send button interactions Foo Service Button Control Characteristic UUID: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx UUID: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx Properties: Notify Value: 0x01 or 0x00
99. GATT to send button interactions Foo Service Button Control Characteristic UUID: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx UUID: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx Properties: Notify Value: 0x01 or 0x00
100. GATT to send button interactions Foo Service Button Control Characteristic UUID: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx UUID: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx Properties: Notify Value: 0x01 or 0x00 Button interactions
101. GATT to send button interactions Foo Service Button Control Characteristic UUID: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx UUID: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx Properties: Notify Value: 0x01 or 0x00 Button interactions
102. GATT to send button interactions Foo Service Button Control Characteristic UUID: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx UUID: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx Properties: Notify Value: 0x01 or 0x00 Button interactions
103. GATT to send button interactions Foo Service Button Control Characteristic UUID: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx UUID: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx Properties: Notify Value: 0x01 or 0x00 Button interactions Y
     1VTIFE
     Y
     3FMFBTFE
104. GATT for remote control Foo Service Remote Control Characteristic UUID: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx UUID: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx Properties: Write Value: Horizontal (-100 ~ 100), Vertical (-100 ~ 100)
105. GATT for remote control Foo Service Remote Control Characteristic UUID: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx UUID: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx Properties: Write Value: Horizontal (-100 ~ 100), Vertical (-100 ~ 100)
106. GATT for remote control Foo Service Remote Control Characteristic UUID: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx UUID: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx Properties: Write Value: Horizontal (-100 ~ 100), Vertical (-100 ~ 100) values
107. GATT for remote control Foo Service Remote Control Characteristic UUID: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx UUID: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx Properties: Write Value: Horizontal (-100 ~ 100), Vertical (-100 ~ 100) values
108. GATT for remote control Foo Service Remote Control Characteristic UUID: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx UUID: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx Properties: Write Value: Horizontal (-100 ~ 100), Vertical (-100 ~ 100) values
109. GATT for generic commands
110. GATT for generic commands Electronic Stimulation Control Characteristic UUID: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx Properties: Write Value: 1 byte
111. GATT for generic commands Electronic Stimulation Control Characteristic UUID: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx Properties: Write Value: 1 byte
112. GATT for generic commands Electronic Stimulation Control Characteristic UUID: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx Properties: Write Value: 1 byte 4 Commands: - Change the pulse frequency - Change the electric current - Right channels on/off - Left channels on/off
113. GATT for generic commands Electronic Stimulation Control Characteristic UUID: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx Properties: Write Value: 1 byte 4 Commands: - Change the pulse frequency - Change the electric current - Right channels on/off - Left channels on/off
114. GATT for generic commands Electronic Stimulation Control Characteristic UUID: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx Properties: Write Value: 1 byte High-order 2 bits - 00: Change the pulse frequency - 01: Change the electric current - 10: Left channels on/off - 11: Right channels on/off
115. GATT for generic commands Electronic Stimulation Control Characteristic UUID: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx Properties: Write Value: 1 byte High-order 2 bits - 00: Change the pulse frequency - 01: Change the electric current - 10: Left channels on/off - 11: Right channels on/off
116. How to define GATT
117. How to define GATT 1. Create UUID for the service & characteristic
118. How to define GATT 1. Create UUID for the service & characteristic $ uuidgen CEEA31BC-BEAC-4A78-B7ED-FC96B6254D4C
119. How to define GATT 1. Create UUID for the service & characteristic 2. Define the properties (Read, Notify, Write, etc.) $ uuidgen CEEA31BC-BEAC-4A78-B7ED-FC96B6254D4C
120. How to define GATT 1. Create UUID for the service & characteristic 2. Define the properties (Read, Notify, Write, etc.) Peripheral → Central: Notify 
 Central → Peripheral: Write $ uuidgen CEEA31BC-BEAC-4A78-B7ED-FC96B6254D4C
121. How to define GATT 1. Create UUID for the service & characteristic 2. Define the properties (Read, Notify, Write, etc.) Peripheral → Central: Notify 
 Central → Peripheral: Write 3. Define the value format $ uuidgen CEEA31BC-BEAC-4A78-B7ED-FC96B6254D4C
122. How to define GATT 1. Create UUID for the service & characteristic 2. Define the properties (Read, Notify, Write, etc.) Peripheral → Central: Notify 
 Central → Peripheral: Write 3. Define the value format Usually limited to 20 bytes $ uuidgen CEEA31BC-BEAC-4A78-B7ED-FC96B6254D4C
123. Reference: GATT profiles by Bluetooth SIG
124. Defining background behaviors
125. Background behaviors on iOS • Very limited - Listening to music - Getting location data - Downloading data
126. Imagine
127. If BLE didn’t work in the background…
129. You would have to always keep the app in the foreground, while snowboarding!
131. You would have to launch the app whenever you go driving!
132. What functions can be used in the background?
133. What functions can be used in the background? • Scanning peripherals
134. What functions can be used in the background? • Scanning peripherals • Connecting with peripherals
135. What functions can be used in the background? • Scanning peripherals • Connecting with peripherals • Reading characteristics’ value
136. What functions can be used in the background? • Scanning peripherals • Connecting with peripherals • Reading characteristics’ value • Writing characteristics’ value
137. What functions can be used in the background? • Scanning peripherals • Connecting with peripherals • Reading characteristics’ value • Writing characteristics’ value • Receiving notifications
138. What functions can be used in the background? • Scanning peripherals • Connecting with peripherals • Reading characteristics’ value • Writing characteristics’ value • Receiving notifications Almost all functions can be used even in the background!
139. How to support background mode
141. Just check this box!
142. Limitations
143. Limitations • Longer intervals for scanning
144. Limitations • Longer intervals for scanning • Must explicitly specify one or more services to scan
145. Limitations • Longer intervals for scanning • Must explicitly specify one or more services to scan • CBCentralManagerOptionShowPowerAlertKey option is ignored
146. Limitations • Longer intervals for scanning • Must explicitly specify one or more services to scan • CBCentralManagerOptionShowPowerAlertKey option is ignored Resources - Core Bluetooth Programming Guide - Core Bluetooth Framework Reference (also in headers)
147. If the app in the background is killed by the system…
149. State Preservation and Restoration
150. State Preservation and Restoration The system takes over the BLE tasks even after the app is killed.
151. State Preservation and Restoration The system takes over the BLE tasks even after the app is killed. - Preserves the state of the app’s central managers and continues the BLE tasks on their behalf.
152. State Preservation and Restoration The system takes over the BLE tasks even after the app is killed. - Preserves the state of the app’s central managers and continues the BLE tasks on their behalf. - Relaunches the app into the background and calls the corresponding delegate method.
153. State Preservation and Restoration The system takes over the BLE tasks even after the app is killed. - Preserves the state of the app’s central managers and continues the BLE tasks on their behalf. - Relaunches the app into the background and calls the corresponding delegate method. → The app can handle BLE events!
155. • The app is killed by the system
156. • The app is killed by the system • The user pushes the button on the peripheral device
157. • The app is killed by the system • The user pushes the button on the peripheral device • The system receives the notification
158. • The app is killed by the system • The user pushes the button on the peripheral device • The system receives the notification • The app is relaunched in the BG and the delegate method is called.
159. func peripheral(peripheral: CBPeripheral, didUpdateValueForCharacteristic characteristic: CBCharacteristic, error: NSError?) { print(“Received the characteristic data!”) } • The app is killed by the system • The user pushes the button on the peripheral device • The system receives the notification • The app is relaunched in the BG and the delegate method is called.
160. func peripheral(peripheral: CBPeripheral, didUpdateValueForCharacteristic characteristic: CBCharacteristic, error: NSError?) { print(“Received the characteristic data!”) } • The app is killed by the system • The user pushes the button on the peripheral device • The system receives the notification • The app is relaunched in the BG and the delegate method is called. The app can process the button interaction!
161. Implementation
162. Implementation • Add an option when initializing the CBCentralManager object. let options = [ CBCentralManagerOptionRestoreIdentifierKey: "somekey" ] centralManager = CBCentralManager( delegate: self, queue: queue, options: options)
163. Implementation • Implement the delegate method which is called when the app is restored. func centralManager(central: CBCentralManager, willRestoreState dict: [String : AnyObject]) { print("Restored") }
164. Testing the restoration
165. Testing the restoration • Kill the app as if it was killed by the iOS kill(getpid(), SIGKILL);
166. How to test without HW prototypes
167. Did the HW prototypes exist when develop the apps? Projects HW prototypes existed? Moff YES WHILL NO BONX NO SmartDrive YES PLEN2 NO Music for the Deaf NO
168. Development Kit
169. Development Kit BLE Module
170. Development Kit BLE Module Display
171. Development Kit BLE Module Display USB interface
172. Development Kit BLE Module Display USB interface Battery box
173. Development Kit Can start development without creating a circuit ourselves BLE Module Display USB interface Battery box
175. Development Kit
176. Development Kit App
177. Development Kit App BLE
178. Horizontal (-100~100) / Vertical (-100~100) Development Kit App BLE
180. Emulator App
181. Emulator App • Develop another iOS app as the alternative to the peripheral device
182. Emulator App • Develop another iOS app as the alternative to the peripheral device • Use CBPeripheralManager
183. Emulator App • Develop another iOS app as the alternative to the peripheral device • Use CBPeripheralManager • Easier for iOS engineers
187. =
188. Multi-Function Control • Single Tap • Double Tap • Long Press • Very Long Press =
189. Troubleshooting
190. Can’t find the peripheral Scan ?
191. Can’t connect Find
192. Can’t connect Connect ×
193. • Connection dropped
194. • Connection dropped • Can’t discover services or characteristics
195. • Connection dropped • Can’t discover services or characteristics • Fail to write
196. • Connection dropped • Can’t discover services or characteristics • Fail to write • Incorrect characteristic values
197. • Connection dropped • Can’t discover services or characteristics • Fail to write • Incorrect characteristic values • Incorrect behaviors in the background
198. • Connection dropped • Can’t discover services or characteristics • Fail to write • Incorrect characteristic values • Incorrect behaviors in the background • etc…
199. Identify which side the problem is on Is the problem on the central side or on the peripheral side? → Compare with another iOS app like ‘LightBlue’
200. Can’t find the peripheral • Scanning, but can’t find the peripheral device
201. Can’t find the peripheral • Scanning, but can’t find the peripheral device Scan
202. Can’t find the peripheral • Scanning, but can’t find the peripheral device Scan but ‘didDiscover’ method isn’t called
203. Can’t find the peripheral • Scan with another iOS app Scan
204. Can’t find the peripheral • Scan with another iOS app Scan Discovered peripherals
205. Can’t connect, etc. Connect
206. Can’t connect, etc. Connect Services & Characteristics
207. Other debugging tools
208. Bluetooth Explorer macOS app made by Apple
210. Low Energy Devices
211. Low Energy Devices Scan, Connect
212. Low Energy Devices Scan, Connect Details of services and characteristics
213. Low Energy Devices Scan, Connect Details of services and characteristics Write, Read, Subscribe
214. func centralManager( central: CBCentralManager, didDiscoverPeripheral peripheral: CBPeripheral, advertisementData: [String : AnyObject], RSSI: NSNumber!) { print(advertisementData) }
215. func centralManager( central: CBCentralManager, didDiscoverPeripheral peripheral: CBPeripheral, advertisementData: [String : AnyObject], RSSI: NSNumber!) { print(advertisementData) } Filtered by iOS!
216. func centralManager( central: CBCentralManager, didDiscoverPeripheral peripheral: CBPeripheral, advertisementData: [String : AnyObject], RSSI: NSNumber!) { print(advertisementData) } Filtered by iOS! → Can’t see all of the advertisement data
217. func centralManager( central: CBCentralManager, didDiscoverPeripheral peripheral: CBPeripheral, advertisementData: [String : AnyObject], RSSI: NSNumber!) { print(advertisementData) } Filtered by iOS! → Can’t see all of the advertisement data e.g. Can’t see the ‘Manufacture Data’ field of iBeacon
219. Not filtered →Can see the ‘Manufacture Data’ field of iBeacon
220. Packet Logger macOS app made by Apple
223. How to get
224. How to get Download ‘Hardware IO Tools for Xcode’
225. How to get Download ‘Hardware IO Tools for Xcode’
226. How to get Download ‘Hardware IO Tools for Xcode’
227. How to get Download ‘Hardware IO Tools for Xcode’
228. App Review
230. MSRP $13,995
231. Costing too much
232. Not enough devices when submitting
233. Videos for review
234. Videos for review • Show how the app works with the peripheral device
235. Videos for review • Show how the app works with the peripheral device • Not need to be cool!
237. • Shoot with iPhone
238. • Shoot with iPhone • Edit with iMovie
239. Recap
240. Recap • What is Bluetooth Low Energy?
241. Recap • What is Bluetooth Low Energy? • Basics of Core Bluetooth with an actual product
242. Recap • What is Bluetooth Low Energy? • Basics of Core Bluetooth with an actual product • Practical Core Bluetooth with specific examples
243. Recap • What is Bluetooth Low Energy? • Basics of Core Bluetooth with an actual product • Practical Core Bluetooth with specific examples - Defining GATT
244. Recap • What is Bluetooth Low Energy? • Basics of Core Bluetooth with an actual product • Practical Core Bluetooth with specific examples - Defining GATT - Defining background behaviors
245. Recap • What is Bluetooth Low Energy? • Basics of Core Bluetooth with an actual product • Practical Core Bluetooth with specific examples - Defining GATT - Defining background behaviors - Testing without HW prototypes
246. Recap • What is Bluetooth Low Energy? • Basics of Core Bluetooth with an actual product • Practical Core Bluetooth with specific examples - Defining GATT - Defining background behaviors - Testing without HW prototypes - Troubleshooting
247. Recap • What is Bluetooth Low Energy? • Basics of Core Bluetooth with an actual product • Practical Core Bluetooth with specific examples - Defining GATT - Defining background behaviors - Testing without HW prototypes - Troubleshooting - App Review
248. Core Bluetooth in iOS 10
249. Nothing special
252. CBManager
254. func centralManagerDidUpdateState(_ central: CBCentralManager) { print("state: \(central.state)") }
255. Initializer without arguments
256. private var centralManager: CBCentralManager! override func viewDidLoad() { super.viewDidLoad() centralManager = CBCentralManager(delegate: self, queue: nil) } From
257. private let centralManager = CBCentralManager() override func viewDidLoad() { super.viewDidLoad() centralManager.delegate = self } private var centralManager: CBCentralManager! override func viewDidLoad() { super.viewDidLoad() centralManager = CBCentralManager(delegate: self, queue: nil) } From To
259. Thank you! Shuichi Tsutsumi - iOS Freelancer • Twitter: @shu223 • GitHub: shu223 • Blog: https://medium.com/@shu223/ • Email: shuichi0526@gmail.com