Everything About Bluetooth (淺談藍牙 4.0) - Central 篇

講解 Bluetooth 的 GATT 的概念，並以 Android 實作
Example code:
Peripheral - BLE CPU Temp
https://github.com/j796160836/Ble-CPUTemp-Android
Central - BLE Temperature Receiver
https://github.com/j796160836/BleTemperatureReceiver-Android

Transcript

1. EVERYTHING ABOUT BLUETOOTH Johnny Sung
2. https://fb.com/j796160836 Johnny Sung Mobile devices Developer https://plus.google.com/+JohnnySung http://about.me/j796160836
4. MessageHorn https://play.google.com/store/apps/details?id=com.JohnnyWorks.messagehorn https://itunes.apple.com/tw/app/messagehorn/id994783068 iOS Server Android Client iOS Server Android Client
6. #-6&5005)
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7. http://www.redicecreations.com/article.php?id=31630 ⚆私儘⚸띋涸㕜桬ㆁ䬘晋♧⚆ )BSBME
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   #M¤UBOE涸껷㶶嫢չ)#պ涸ざ㻨 http://www.ettoday.net/dalemon/post/3250
9. 2.0 2.0 + 4.0 Dual Mode 4.0 Bluetooth SMART READY Bluetooth Bluetooth SMART
10. #-&
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11. Bluetooth low energy Protocol Stack
12. • Peripheral
    
    ヰ鼹酤縨 • Central • Broadcaster • Observer GAP Roles
13. Peripheral Central
14. Peripheral Central
15. Peripheral Central
16. GATT
17. • Service • Characteristic • Data • Descriptor GATT
18. • Heart Rate Service • Heart Rate Measurement • Data • Descriptor 00002A37-0000-1000-8000-00805F9B34FB GATT Heart Rate Monitor 0000180D-0000-1000-8000-00805F9B34FB Property: Notify
19. Property: Indicate • Health Thermometer • Temperature Measurement • Data • Descriptor GATT Health Thermometer 00001809-0000-1000-8000-00805F9B34FB 00002A1C-0000-1000-8000-00805F9B34FB
20. • Read • Write • Notify • Indicate Characteristic Properties
21. UUID 00002A37-0000-1000-8000-00805F9B34FB 0x2A37 Heart Rate Measurement
22. • an indicate operation is identical to a notify operation except that indications are acknowledged, while notifications are not. Notify vs Indicate http://mbientlab.com/blog/bluetooth-low-energy-introduction/
23. https://developer.bluetooth.org/gatt/services/Pages/ServiceViewer.aspx? u=org.bluetooth.service.health_thermometer.xml
28. Property: Indicate • Health Thermometer • Temperature Measurement • Data • Descriptor GATT Health Thermometer 00001809-0000-1000-8000-00805F9B34FB 00002A1C-0000-1000-8000-00805F9B34FB
29. "/%30*%
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30. • Central • Android 4.3 (API Level 18) • Peripheral • Android 5.0 (API Level 21) • Specific BLE chip Requirement in Android
31. CENTRAL
32. • Discover • Connect • Explore • Interact Central
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33. <uses-permission android:name="android.permission.BLUETOOTH"/>
 <uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>
 
 <uses-feature
 android:name="android.hardware.bluetooth_le"
 android:required="true"/> Bluetooth
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34. Bluetooth
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    #-& getPackageManager().hasSystemFeature(PackageManager.FEATURE_BLUETOOTH_LE) @Override
 public void onActivityResult(int requestCode , int resultCode, Intent data) {
 if (requestCode == REQUEST_ENABLE_BT) {
 if (resultCode == Activity.RESULT_OK) {
 // Bluetooth has turned on
 } else {
 // User did not enable Bluetooth or an error occurred
 }
 }
 } Intent enableIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
 startActivityForResult(enableIntent, REQUEST_ENABLE_BT); ေ౰յῘῴ࿩
35. Discover
    ෆ⇨⊬ᇂ BluetoothManager manager = (BluetoothManager) getSystemService(Context.BLUETOOTH_SERVICE);
 BluetoothAdapter adapter = manager.getAdapter(); adapter.startLeScan(scanCallback); adapter.stopLeScan(scanCallback); ଦ֞
    #MVFUPPUI"EBQUFS Ῐ൓ෆ⇨ ᾵ඏෆ⇨ This method was deprecated in API level 21 API level 18
36. Discover
    ෆ⇨⊬ᇂ BluetoothAdapter.LeScanCallback scanCallback =
 new BluetoothAdapter.LeScanCallback() {
 @Override
 public void onLeScan(final BluetoothDevice device , final int rssi , byte[] scanRecord) {
 addDevice(device, rssi);
 // Add device to list
 }
 }; ෆ⇨֥
    $BMMCBDL This method was deprecated in API level 21 API level 18
37. scanner.stopScan(scanCallback); scanner.startScan(filters, settings, scanCallback); Ῐ൓ෆ⇨ ᾵ඏෆ⇨ Discover
    ෆ⇨⊬ᇂ ڿႨ
    #MVFUPPUI-F4DBOOFS API level 21 BluetoothManager manager = (BluetoothManager) getSystemService(Context.BLUETOOTH_SERVICE);
 BluetoothAdapter adapter = manager.getAdapter(); BluetoothLeScanner scanner = adapter.getBluetoothLeScanner(); // Setting ScanFilter and ScanSettings
38. Discover
    ෆ⇨⊬ᇂ ArrayList<ScanFilter> filters = new ArrayList<>();
 ScanFilter.Builder fb = new ScanFilter.Builder();
 fb.setServiceUuid(new ParcelUuid(UUID.fromString("...")));
 filters.add(fb.build()); 
 ScanSettings.Builder sb = new ScanSettings.Builder();
 ScanSettings settings = sb.build(); ෆ⇨⇢⇊ API level 21
39. Discover
    ෆ⇨⊬ᇂ ෆ⇨⇢⇊ • ScanFilter • ServiceUuid • ServiceData • DeviceAddress • DeviceName • ManufacturerData API level 21
40. Discover
    ෆ⇨⊬ᇂ ෆ⇨⇢⇊ • ScanSettings • CallbackType (All matches / First match / Match lost) • MatchMode • NumOfMatches • ScanMode (Low latency / Balanced / Low power) API level 21
41. ScanCallback scanCallback = new ScanCallback() {
 @Override
 public void onScanResult(int callbackType , ScanResult result) {
 if (callbackType == ScanSettings.CALLBACK_TYPE_ALL_MATCHES) {
 // Add device to list
 }
 }
 
 @Override
 public void onScanFailed(int errorCode) {
 Log.e("Scan Failed", "Error Code: " + errorCode);
 } @Override
 public void onBatchScanResults(List<ScanResult> results) { }
 }; Discover
    ෆ⇨⊬ᇂ ෆ⇨
    $BMMCBDL API level 21
42. Discover
    ෆ⇨⊬ᇂ ਙԛෆ⇨֥֞⊬ᇂ
43. Connect
    ’ࢤ⊬ᇂ ’ࢤ⊬ᇂ String deviceAddress = "0A:0B:0C:0D:0F:10";
 BluetoothDevice device = BluetoothAdapter.getDefaultAdapter().getRemoteDevice(address); BluetoothGatt mBluetoothGatt = device.connectGatt(this, false, mGattCallback); API level 18
44. private final BluetoothGattCallback mGattCallback = new BluetoothGattCallback() {
 @Override
 public void onConnectionStateChange(BluetoothGatt gatt , int status, int newState) {
 switch (newState) {
 case BluetoothProfile.STATE_CONNECTED: // do discoverServices
 break;
 case BluetoothProfile.STATE_DISCONNECTED:
 break;
 
 case BluetoothProfile.STATE_CONNECTING:
 case BluetoothProfile.STATE_DISCONNECTING:
 break;
 }
 }
 
 // More ...
 }; Connect
    ’ࢤ⊬ᇂ (BUU$BMMCBDL API level 18
45. Explore
    ฐ෬⊷ਘ᾵ἧ ෆ⇨
    4FSWJDFT API level 18 mBluetoothGatt.discoverServices(); private final BluetoothGattCallback mGattCallback = new BluetoothGattCallback() {
 // ... Continued 
 @Override
 public void onServicesDiscovered(BluetoothGatt gatt , int status) {
 if (status == BluetoothGatt.GATT_SUCCESS) {
 // Do Something
 }
 } // More ...
 }; (BUU$BMMCBDL
    ⇟
46. Explore
    ฐ෬⊷ਘ᾵ἧ ౼֤
    4FSWJDFT API level 18 BluetoothGattService gattService = mBluetoothGatt.getService(UUID.fromString("..."));
 BluetoothGattCharacteristic characteristic = gattService.getCharacteristic(UUID.fromString("..."));
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47. Explore
    ฐ෬᾵ἧ ਙԛ෮Ⴕ֥
    4FSWJDFT
48. Explore
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    $IBSBDUFSJTUJDT
49. Interact
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    ֥ᆴ API level 18 byte[] bytes = characteristic.getValue(); private final BluetoothGattCallback mGattCallback = new BluetoothGattCallback() { // ... Continued
 @Override
 public void onCharacteristicRead(BluetoothGatt gatt,
 BluetoothGattCharacteristic characteristic, int status) {
 if (status == BluetoothGatt.GATT_SUCCESS) {
 // Do Something
 }
 } // More ...
 }; (BUU$BMMCBDL
    ⇟
50. Interact
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    ֥ᆴ API level 18 byte[] bytes = characteristic.getValue(); float floatValue = characteristic.getFloatValue( BluetoothGattCharacteristic.FORMAT_FLOAT, 0); 
 int intValue = characteristic.getIntValue( BluetoothGattCharacteristic.FORMAT_SINT8, 0); 
 int uintValue = characteristic.getIntValue( BluetoothGattCharacteristic.FORMAT_UINT8, 0); 
 String stringValue = characteristic.getStringValue(0); ὕॖၛ≾∄ồ౼ mBluetoothGatt.setCharacteristicNotification(characteristic, true);
 UUID CCCD = UUID.fromString("00002902-0000-1000-8000-00805f9b34fb");
 BluetoothGattDescriptor descriptor = characteristic.getDescriptor(CCCD);
 descriptor.setValue(BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE);
 mBluetoothGatt.writeDescriptor(descriptor);
51. Interact
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    ۷ྍ API level 18 mBluetoothGatt.setCharacteristicNotification(characteristic, true);
 UUID CCCD = UUID.fromString("00002902-0000-1000-8000-00805f9b34fb");
 BluetoothGattDescriptor descriptor = characteristic.getDescriptor(CCCD);
 descriptor.setValue( BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE);
 mBluetoothGatt.writeDescriptor(descriptor); private final BluetoothGattCallback mGattCallback = new BluetoothGattCallback() { // ... Continued
 @Override
 public void onCharacteristicChanged(BluetoothGatt gatt,
 BluetoothGattCharacteristic characteristic) {
 // Do Something
 }
 }; (BUU$BMMCBDL
    ⇟
52. Interact
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    $IBSBDUFSJTUJDT
53. Samples https://github.com/j796160836/nRFSample_uCXpresso-Android nRFSample-Android https://github.com/j796160836/nRFSample_uCXpresso-iOS nRFSample-iOS https://github.com/googlesamples/android-BluetoothLeGatt android-BluetoothLeGatt
54. Develop tools https://play.google.com/store/apps/details?id=no.nordicsemi.android.nrftoolbox nRF Toolbox https://itunes.apple.com/tw/app/id557428110 LightBlue Explorer (iOS) https://itunes.apple.com/us/app/id820906058 nRF Toolbox (iOS) https://play.google.com/store/apps/details?id=com.kyriakosalexandrou.bluetoothsupportcheck BLE Central,Peripheral Check https://play.google.com/store/apps/details?id=com.macdom.ble.blescanner BLE Scanner: Read,Write,Notify Andorid
55. Develop tools https://itunes.apple.com/tw/app/id557428110 LightBlue Explorer https://itunes.apple.com/us/app/id820906058 nRF Toolbox iOS https://itunes.apple.com/tw/app/lightblue/id639944780?mt=12 Mac LightBlue
56. MessageHorn
57. MessageHorn for iOS https://itunes.apple.com/tw/app/messagehorn/id994783068
58. MessageHorn for Android Wear When messaging Connected to device Device selection Main https://play.google.com/store/apps/details?id=com.JohnnyWorks.messagehorn
60. MessageHorn https://play.google.com/store/apps/details?id=com.JohnnyWorks.messagehorn https://itunes.apple.com/tw/app/messagehorn/id994783068 iOS Server Android Client iOS Server Android Client
61. AndroidWear
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62. Q&A
63. • https://developer.bluetooth.org/gatt/services/Pages/ ServicesHome.aspx • https://www.safaribooksonline.com/library/view/getting-started- with/9781491900550/ch04.html • http://gogoprivateryan.blogspot.tw/2014/09/cc2540-bluetooth-low- energy-3.html • http://www.redicecreations.com/article.php?id=31630 • http://mbientlab.com/blog/bluetooth-low-energy-introduction/ References
64. https://www.facebook.com/groups/353660298163446/ 穿戴式裝置開發者社群 歡迎您的加⼊入